Krill may be small, but their role in carbon storage is monumental. Beneath Antarctica's icy waters, these tiny crustaceans are emerging as unexpected heroes in the fight against atmospheric carbon.



While the significance of blue carbon habitats like mangroves, seagrasses, and saltmarshes is well-known, recent research highlights the vital contribution of Antarctic krill and their impressive carbon storage capacity.



<h2 class="wp-block-heading" id="h-the-unsung-heroes-of-carbon-capture">The unsung heroes of carbon capture</h2>



When we think of <a href="https://www.earth.com/news/mountains-both-carbon-sinks-and-carbon-sources/" target="_blank" rel="noreferrer noopener">carbon sinks</a> - the vital natural systems that absorb and store carbon from the atmosphere - we might not consider the role of small crustaceans.



The new findings reveal that Antarctic krill store amounts of carbon that are comparable to critical blue carbon habitats like mangroves, seagrasses, and saltmarshes.



Despite <a href="https://www.earth.com/wp-content/uploads/2024/09/antarctic-krill_store-huge-amounts-carbon_credit-Imperial-College_1m.jpg" target="_blank" rel="noreferrer noopener">their minute size</a>, these krill contribute significantly to carbon cycling, thanks to their enormous combined populations.



"A key player in the biological carbon pump is the Antarctic krill,&nbsp;Euphausia superba, whose faecal pellets, moults and carcasses can completely dominate Southern Ocean carbon fluxes to the ocean’s interior in the Austral growth season," wrote the researchers.



<h2 class="wp-block-heading" id="h-the-role-of-krill-in-carbon-cycling">The role of krill in carbon cycling</h2>



Krill are often viewed as merely being food for larger animals. Whales, seals, and penguins relish these <a href="https://www.earth.com/news/new-deep-sea-crustacean-species-discovered-in-the-bahamas/" target="_blank" rel="noreferrer noopener">crustaceans</a>, and humans also fish them for bait, aquaculture, and dietary supplements. 



However, the value of krill extends far beyond the food chain.



“For the past decade we have been piecing together the role krill have in carbon cycling, finally resulting in this amazing finding that krill, and their poo, store similar amounts of carbon as some coastal marine plants," explained Dr. Emma Cavan, one of the lead authors from <a href="https://www.imperial.ac.uk/" target="_blank" rel="noreferrer noopener">Imperial College London</a>.



Protection for these vital creatures is an urgent matter. 



"I hope this means we can now work towards conserving krill and their valuable Southern Ocean ecosystem with the same gumption as we are seagrasses and mangroves," Cavan continued.



<h2 class="wp-block-heading" id="h-carbon-storage-in-ocean-systems">Carbon storage in ocean systems</h2>



<a href="https://www.earth.com/news/climate-change-is-impacting-marine-life-more-than-we-realized/" target="_blank" rel="noreferrer noopener">Marine life</a> plays a pivotal role in locking carbon away from the atmosphere in ocean systems. The term "blue carbon" was coined over a decade ago to describe the crucial role <a href="https://www.earth.com/news/native-aquatic-plants-could-help-clean-coastal-waters/" target="_blank" rel="noreferrer noopener">coastal marine plants</a> play in this process. 



Yet, the ocean has other storage methods far from the coast through animals like krill. These creatures feed on phytoplankton - microscopic <a href="https://www.earth.com/news/good-news-plants-are-absorbing-more-human-produced-co2-than-expected/" target="_blank" rel="noreferrer noopener">plants that absorb carbon</a> during photosynthesis.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/09/antarctic-krill_store-huge-amounts-carbon_illustration_credit-Imperial-College_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/09/antarctic-krill_store-huge-amounts-carbon_illustration_credit-Imperial-College_1s.webp" alt="Illustration of Antarctic krill in the Southern Ocean ecosystem. Credit: Glynn Gorick/Imperial College" class="wp-image-1945051"/></a><figcaption class="wp-element-caption">Illustration of Antarctic krill in the Southern Ocean ecosystem. Credit: Glynn Gorick/Imperial College</figcaption></figure>



When krill excrete or shed their exoskeletons, the carbon they've consumed sinks to the ocean depths, where it remains for a long time. 



This process could lock away at least 20 million tons of carbon annually, which is the equivalent of up to $46 billion worth of carbon storage.



“Antarctic krill are well known for being at the center of the unique Southern Ocean ecosystem and supporting an important fishery. But this study paints another picture of krill -- on their key role in storing carbon," noted study co-author Professor Angus Atkinson from <a href="https://pml.ac.uk/" target="_blank" rel="noreferrer noopener">Plymouth Marine Laboratory</a>.



<h2 class="wp-block-heading" id="h-the-power-of-krill-swarms">The power of krill swarms</h2>



The massive populations of krill make them effective carbon storers. Swarms can contain up to 30 trillion individuals, producing a deluge of carbon-rich waste products.



“One of the amazing things about krill is that they form massive swarms, which can be over a kilometer in length," said Dr. Anna Belcher, a co-author from the <a href="https://www.ceh.ac.uk/" target="_blank" rel="noreferrer noopener">UK Centre for Ecology &amp; Hydrology</a>. 



"This drives a huge 'rain' of krill poo after feeding, making krill globally important for locking carbon away from the atmosphere."



The study also reveals that the depth needed to secure carbon storage effectively is surprisingly shallow, with an average of 381 meters.



<h2 class="wp-block-heading" id="h-protecting-krill-for-carbon-storage">Protecting krill for carbon storage </h2>



Antarctic krill are under increasing threat from rapid polar climate change, which is drastically altering their habitat. These krill are also targeted by an expanding fishery that further depletes their populations.



The combined pressures make the carbon storage capacity of krill an urgent and vital area for protection. 



Preserving this crucial carbon sink is essential for maintaining the delicate balance of the Southern Ocean ecosystem, and for meeting global climate goals.



The research highlights the need to integrate carbon considerations into broader conservation policies.



The study is published in the journal <a href="https://www.nature.com/articles/s41467-024-52135-6" target="_blank" rel="noreferrer noopener">Nature Communications</a>.



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Tiny Antarctic krill store enormous amounts of carbon

Krill may be small, but their role in carbon storage is monumental. Beneath Antarctica's icy waters, these tiny crustaceans are emerging as unexpected heroes in the fight against atmospheric carbon. While the significance of blue carbon habitats like mangroves, seagrasses, and saltmarshes is well-known, recent research highlights the vital contribution of Antarctic krill and their impressive carbon storage capacity. The unsung heroes of carbon capture When we think of carbon sinks - the vital natural systems that absorb and store carbon from the atmosphere - we might...

A new study led by <a href="https://www.northwestern.edu/">Northwestern University</a> has found that <a href="https://www.earth.com/news/electric-fish-large-brains/">fish</a> look downward when they swim. By combining simulations of zebrafish’s brain, native environment, and spatially-varying swimming behavior into a comprehensive computational model, the experts discovered that looking down while swimming forward is an adaptive behavior that evolved to help fish self-stabilize, for instance when swimming against a current.



As water moves, fish are continuously trying to self-stabilize in order to remain in place rather than getting swept away in a moving stream. While focusing on other fish, plants, or pieces of debris could give fish a false sensation that they are moving, looking at the stable riverbed below offers them more reliable information about their swimming direction and speed.



“It’s similar to sitting on a train car that isn’t moving. If the train next to yours starts to pull to away from the station, it can trick you into thinking you are moving too,” said study lea author Emma Alexander, an assistant professor of Computer Science at Northwestern.&nbsp;



“The visual cue from the other train is so strong that it overrides the fact that all of your other senses are telling you that you are sitting still. That’s exactly the same phenomenon that we are studying in fish. There are many misleading motion cues above them, but the most abundant and reliable signals are from the bottom of the river.”



These findings could inform groundbreaking designs for artificial vision systems and sophisticated bio-inspired robots. “If you were making a fish-inspired robot and you just looked at its anatomy, you might think ‘the eyes are pointing sideways, so I’m going to point my cameras sideways. But it turns out that the eyes are pointing sideways because they are balancing several tasks. We think they point sideways because it’s a compromise — they look upward to hunt and downward to swim,” Alexander concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1016/j.cub.2022.10.009">Current Biology</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Why do fish look down when they swim?

A new study led by Northwestern University has found that...

Australia is the fourth-worse country in the world in terms of species extinctions, and is in the top three globally for critically endangered animals. Although this week’s Federal Budget included a $224 million allocation to help protecting these species, a new study led by the <a href="https://www.unisa.edu.au/">University of South Australia</a> (UniSA) has revealed an overwhelming public ignorance of Australia’s most threatened species, a factor that is most likely significantly contributing to the current extinction crisis.



By polling over 300 zoo visitors and other community members to assess their awareness of seven <a href="https://www.earth.com/earthpedia-articles/endangered-species/">endangered species</a> at risk of extinction within the next decade – the Tasmanian devil, the Leadbeater’s possum, the eastern barred bandicoot, the helmeted honeyeater, the southern corroboree frog, the Lord Howe Island (LHI) stick insect, and the orange-bellied parrot – the researchers found that over 90 percent of people failed to recognize six of these seven species, the exception being the iconic Tasmanian devil.



“There are huge gaps in community knowledge regarding native Australian wildlife, with less than eight per cent of people able to correctly name six of seven endangered species when shown photographs,” said study lead author Elisa Pearson, a conservation psychologist at UniSA.



“Apart from the Tasmanian devil, which 86 percent of people recognized, the level of familiarity and knowledge of our vulnerable species is limited. Misidentification is also common, particularly the eastern barred bandicoot which is often mistaken for a bilby.”



The researchers highlight a clear link between species recognition, likeability, and conservation support, arguing that people are far more likely to donate toward the conservation of Australia’s iconic kangaroo, koala, and wombat species, despite them being in fact not endangered. The most likable Australian animals - the koala and the kangaroo – also reflect the “similarity principle,” which suggests that people tend to prefer animals that are more similar to them, and that when only a limited number of species can be conserved, mammals are always favored over other species, regardless of their endangered status.



“Apart from the likeability factor, our study showed that being able to recognize species increased people’s willingness to support their conservation, so that is a starting point we need to address,” Dr. Pearson said.



Endangered insects are unfortunately disliked by nearly 85 percent of people, a factor putting their survival at great risk. However, as the scientists argue, these perceptions could be changed through clever marketing initiatives.



“The LHI stick insect has some exceptional qualities, such as their resilience and survival against all odds, their ability to reproduce without males, their tendency to form large social groups during the day, or even the fact that their foot pads are heart shaped. If people knew these facts the likeability factor would likely shoot up,” Dr. Pearson concluded.



The study is published in the <a href="http://dx.doi.org/10.1016/j.jnc.2022.126257">Journal for Nature Conservation</a>.&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Australians are unaware of their most endangered species

Australia is the fourth-worse country in the world in terms...

The evolutionary clade and biodiversity of green <a href="https://www.earth.com/news/lizards-and-other-squamates-rapidly-diversified-during-the-jurassic/">lizards</a> of the genera Lacerta and Timon - which are frequently found in the Mediterranean basin and surrounding regions of Europe, North Africa, and Asia - have not been studied extensively from the perspective of historical biogeography. Now, a research team led by the <a href="https://www.ub.edu/web/portal/en/">University of Barcelona</a> (UB) has analyzed the potential evolutionary processes that gave rise to the biodiversity of species in this group in Mediterranean ecosystems.&nbsp;



While previous studies have argued that the evolution of green lizards was a result of a combination of evolution and the conservatism of ecological niches, the relative role of geological history and niche dynamics has not yet been assessed. In the new study, researchers combined cutting-edge analytical tools to investigate the evolution of phenotypes and the biogeographic history of green lizard phylogeny, and to infer their relative contribution to species diversification. By integrating comprehensive data on changes in terrestrial ecosystem configuration and connectivity in the Mediterranean, the scientists assessed the importance of dispersal and vicariance in determining historical range dynamics.



“[Previous] inferences usually focus on a single aspect of diversification: either cladogenesis, geographic dynamics, climatic niche properties, or phenotypic trait evolution. Our study is innovative in bringing together evidence that has allowed us to contrast hypotheses about different potential evolutionary processes that might act separately or in combination to shape species diversity in the Mediterranean hotspot,” explained study senior author Antigoni Kaliontzopoulou, an expert in Evolutionary Biology at UB.&nbsp;



The analyses revealed that the biogeographic history of this group of lizards is the result of a combination of range expansions linked to dispersal events and rapid evolution of ecological niche characteristics within specific clades.&nbsp;



“As a whole, the group has diversified in a relatively steady rhythm, without changes in lineage diversification rates associated to major climatic events of the Mediterranean region, and without an apparent link to functional morphological or climatic niche divergence,” said Kaliontzopolou. “Rather, the colonization of previously empty areas promoted the diversification of new lineages through their isolation from their relatives and was facilitated, in some groups, by an increased tolerance to lower temperatures.”



The scientists provided evidence of a combined role of higher-scale niche conservatism and rapid niche evolution underlying the evolutionary history of these lizards, with several examples supporting the idea that, while niche conservatism is a common mechanism favoring the buildup of diversity, transition away from several hotspots is related to events of accelerated niche evolution – which contrasts with the situation in other geographic areas, such as the tropics, where structural niche partitioning is a crucial process of lineage diversification.



“In Mediterranean ecosystems, instead, it seems that lineage diversification is rather driven by geological events and through allopatric divergence after the colonization of new environments. In such environments, morphological divergence seems to occur in much more recent times and within already diversified groups, possibly as a response to ecological-scale events or processes such as sexual selection, not investigated in our study,” Kaliontzopolou concluded.



The study is published in the <a href="http://dx.doi.org/10.1111/jbi.14497">Journal of Biogeography</a>.&nbsp;&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

How did green lizards evolve in the Mediterranean?

The evolutionary clade and biodiversity of green lizards of the...

The elusive platypus is perhaps the most unusual mammal alive today. Apart from having a duck-like bill that senses the presence of prey using electrical currents in the water, it lays eggs like a <a href="https://www.earth.com/news/songbirds-are-crossbreeding-in-human-altered-landscapes/">bird</a> but suckles its young on milk that seeps from a mammary patch. It is a monotreme, one of the most ancient branches of mammals, and is found only in eastern Australia where it inhabits fresh water creeks, slow-moving rivers, lakes joined by rivers, and artificial water storage sites, such as farm dams.&nbsp;



The species is listed as "near threatened" by the IUCN, and is thought to have undergone significant population declines in recent years due to several different human-mediated threats. Although platypuses spend most of their time in or near water, they do move over land in order to disperse and find more suitable habitats. In light of this, it has been proposed that the presence of large dams on rivers may have a detrimental effect on platypus populations because this may limit their movements, both upstream and downstream.



In Australia, 77 percent of all major dams are situated in regions where platypuses occur. These dams are predicted to represent barriers to dispersal, which then has potential long-term implications for gene flow, genetic variation and the ability to adapt to changing conditions. However, the extent to which dams actually restrict movements, and the genetic consequences of this, remain largely unquantified at present.&nbsp;



In a new study, published in&nbsp;<a href="http://dx.doi.org/10.1038/s42003-022-04038-9">Communications Biology</a>, researchers from universities in Australia and the U.S. have examined the genetic makeup of platypuses in nine river systems in eastern Australia. In five of the rivers, major dams regulate the flow of water, whereas the remaining four rivers are free flowing and are not fragmented by large dams. These included the free-flowing Ovens River, along with the dammed Mitta-Mitta River, and the free-flowing Tenterfield Creek, along with the nearby Severn River regulated by a large dam.



The researchers used DNA analysis to examine the relationships between intergroup genetic differentiation in platypus populations, and the geographic distance separating the populations. They tested whether populations separated by dams were more genetically differentiated than populations in landscapes lacking such barriers but separated by a similar distance. The experts also used genetic-based methods to infer patterns of dispersal and gene flow between platypus populations.&nbsp;



The study found that large dams are significant barriers to platypus movements. This was reflected in the greater genetic differentiation between platypus populations above and below large dams than between populations along rivers without dams. Importantly, the extent of this genetic differentiation was greater where dams had been in existence for longer, reflecting the long-term impacts of restricting gene flow between populations.&nbsp;



“We extracted the DNA from the blood collected by our Platypus Conservation Initiative researchers at UNSW. By using thousands of molecular markers, we were able to identify a strong signal indicating that genetic differentiation increased rapidly between platypuses below and above these large dams,” said study lead author Dr. Luis Mijangos, who is now at the University of Canberra.



“This is a profound result with significant implications for platypus conservation. We've long suspected that prey can restrict platypus movements, but this is the ‘smoking gun.’ These animals just can't get around big dams," said study co-author Professor&nbsp;<a href="https://www.unsw.edu.au/staff/richard-kingsford">Richard Kingsford</a>, Director of the&nbsp;<a href="https://www.unsw.edu.au/research/ecosystem">UNSW Centre for Ecosystem Science</a>.



Despite the fact that platypuses can walk substantial distances over land, the results of this study indicate that they cannot overcome high dam walls. In addition, large, open water bodies typically found above dam walls, as well as regulated water flow areas below dam walls, are not suitable habitats for platypuses. Major dams thus restrict the movements of individuals along waterways and act as barriers separating populations.&nbsp;



As a consequence, major dams restrict the gene flow between platypus groups and therefore increase the possibility of inbreeding and the loss of adaptive genetic variation, reduce the chances of recolonizing areas where local extinctions have occurred and the likelihood of dispersing to areas with more suitable conditions. All these factors, along with reduced habitat quality due to climate change, are expected to lower the long-term viability of platypus populations.



“We know that platypuses are declining in many parts of their range in eastern Australia, affected by many threats. This study identifies one of the main threats to this iconic species,” said study co-author Dr. Gilad Bino, leader of the Platypus Conservation Initiative at UNSW Sydney. “There is still much we don’t know about the ecology of the platypus, but given its international status as a monotreme, it is increasingly vital that we understand and manage the threats to this unique species.”



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Large dams are significant barriers to platypus survival

The elusive platypus is perhaps the most unusual mammal alive...

Madagascar is the world’s fifth largest island and is situated in the southern Indian Ocean, around 250 miles (400 kilometers) off the east coast of southern Africa. Although it is thought to be one of the last large land masses to have been colonized by humans, details of its settlement remain sketchy and enigmatic.&nbsp;



Today, this fascinating island is home to a unique assemblage of fauna, such as lemurs, tenrecs and fossas, that are found nowhere else on earth. The paleontological evidence, however, reveals that there were once impressive giant birds and <a href="https://www.earth.com/news/mammals-fight-over-scarce-resources-in-brutal-environments/">mammals</a> present, but that these megavertebrates disappeared from the face of the island around 1,000 years ago. Some scientists have suggested that human activities may have been implicated in their demise but, without knowing the history of human occupation of the island, it is impossible to ascertain the impact that colonizers may have had on the island’s biodiversity.



A new study, published in the journal <a href="http://dx.doi.org/10.1016/j.cub.2022.09.060">Current Biology</a>, has now used genetic techniques, local ancestry information and simulated genetic data to understand more about the origins of the Malagasy people and to retrace the history of human settlement on the island. During a 10-year period starting in 2007, Malagasy and international researchers from the Madagascar Genetic and Ethnolignuistic (MAGE) project visited more than 250 villages across the island to sample human cultural and genetic diversity.&nbsp;



Previous linguistic studies have suggested that the Malagasy language evolved from an Austronesian background and shares similarities with languages spoken in Indonesia, more than 4,000 miles away. In addition, there are contributions from Bantu and Arab-Swahili languages, indicating possible influences from the African mainland. The people who live on Madagascar today are known to trace their roots back to two small populations: one Bantu-speaking from Africa and another Austronesian-speaking from Asia. But, beyond that, the history remained rather murky.&nbsp;



Researchers in the current study used data on shared genomic fragments to understand the demographic history of the Malagasy population. The number and length of shared chromosomal fragments, called Identity-By-Descent haplotypes (IBD), are markers of fluctuations in population size over time. Data on the prevalence and structure of shared segments of DNA were thus analyzed from 700 Malagasy people, and were compared with data from 3,464 individuals sampled in other populations.



The results of the study indicated that the present-day Malagasy population carries genetic evidence of an admixture event between Bantu-speaking African and Austronesian-speaking Asian populations. This event occurred around 1,000 years ago when Bantu-speaking Africans arrived on the island.&nbsp;



Although the results could not elucidate the time of arrival of the Asian population, it did show that this group of people underwent at least 1,000 years of isolation and genetic bottleneck before the arrival of the African peoples. It also showed that, at the time of the admixture event, the Asian inhabitants of the island numbered no more than a few hundred individuals and there had been no significant genetic exchange with any other groups of people over the previous 1,000 years.&nbsp;



The authors of the study say their results cannot show whether the Asian population was isolated once it arrived in Madagascar, or whether it arrived subsequent to having been isolated for between 30 and 70 generations somewhere else. Both scenarios are possible, they say. What is clear, however, is that after gene flow from the African colonizers commenced, the Malagasy population experienced rapid expansion and growth. In addition, the time of admixture and population expansion coincides with a time during which all the island’s megafauna became extinct.&nbsp;



“This human demographic expansion was simultaneous with a cultural and ecological transition on the island,” says Denis Pierron, French National Centre for Scientific Research (CNRS) researcher in Toulouse, France. “Around the same period, cities appeared in Madagascar and all the vertebrates of more than 10 kilograms disappeared.”



The findings have important implications that may now be applied to studies of other human populations. For instance, it shows it’s possible to untangle the demographic history of ancient populations even well after two or more groups have mixed, by using genetic data and computer simulations to test the likelihood of different scenarios. The findings also offer new insights into how past changes in human populations led to changes in whole ecosystems.



“Our study supports the theory that it was not directly the arrival of humans on the island that caused the disappearance of the megafauna, but rather a change in lifestyle that caused both a human population expansion and a reduction in biodiversity in Madagascar,” Pierron says.



While these efforts have led to much better understanding of Madagascar’s history, many intriguing questions remain. For instance, Pierron asks, “If the ancestral Asian population was isolated for more than a millennium before mixing with the African population, where was this population? Already in Madagascar or in Asia? Why did the Asian population isolate itself over 2,000 years ago? Around 1,000 years ago, what triggered the observed cultural and demographic transition?”&nbsp;



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Madagascar extinctions linked to human expansion 1,000 years ago

Madagascar is the world’s fifth largest island and is situated...

For many years, scientists have considered enhanced photosynthesis as one of the possible beneficial effects of increasing levels of atmospheric <a href="https://www.earth.com/news/new-tech-can-capture-carbon-dioxide-from-the-atmosphere/">carbon dioxide</a>: since plants use CO2 for photosynthesis, higher levels of this gas were thought to lead to more productive plants.&nbsp;



However, a new study led by the <a href="https://www.umontpellier.fr/en/recherche/unites-de-recherche/institut-des-sciences-des-plantes-de-montpellier">Institute of Plant Sciences</a> in Montpellier, France (IPSiM), has found that this effect may be less than expected because elevated carbon dioxide levels could make it difficult for plants to obtain minerals necessary to properly grow and provide nutritious food.



“There are many reports in the literature showing that the CO2&nbsp;levels expected at the end of the twenty-first century will lead to a lower concentration of nitrogen in most plants, mainly affecting the protein content in plant products,” explained study first author Alain Gojon, the research director of France’s <a href="https://www.inrae.fr/en/about-us">National Research Institute for Agriculture, Food and the Environment</a>. “It is very important to understand why growing plants at elevated CO2&nbsp;has such a negative effect on the protein content of most staple crops and the future of food.”



Although plants use photosynthesis to incorporate carbon dioxide into sugars that they derive their energy from, this process does not provide them with the key minerals they need to grow, such as nitrogen, phosphorous, and iron, which are instead collected from the soils through their root systems.&nbsp;



Among these minerals, nitrogen is particularly important not only as a key building block for the amino acids that plants use to make proteins, but also for providing proper nutrition for humans. “What is clear is that the nutrient composition of the main crops used worldwide, such as rice and wheat, is negatively impacted by the elevation of CO2. This will have a strong impact on food quality and global food security,” said study senior author Antoine Martin, a research scientist at IPSiM.



“Two main nutrients that are essential for human nutrition may be affected by this phenomenon,” Gojon added. “The first one is proteins built from nitrogen. In developing countries this can be a big issue, because many diets in these countries aren’t rich in proteins and plants grown at elevated CO2&nbsp;can have twenty to thirty percent less protein. The second one is iron. Iron deficiency already affects an estimated two billion people worldwide.”



Besides impacting global food systems, mineral deficiencies due to increased CO2&nbsp; levels may lead to a negative feedback loop for climate change mitigation. “The terrestrial carbon sink associated with enhanced photosynthesis may be limited if most of the vegetation is deficient in nitrogen and other minerals, which may prevent any additional increase of CO2&nbsp;capture from the atmosphere,” Gojon concluded.



The study is published in the journal <a href="https://doi.org/10.1016/j.tplants.2022.09.002">Trends in Plant Science</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Elevated CO2 levels will make crops less nutritious

For many years, scientists have considered enhanced photosynthesis as one...

On January 15, 2022, <a href="https://www.earth.com/news/new-clues-about-the-hunga-tonga-hunga-haapai-eruption/">Hunga Tonga–Hunga Haʻapai</a> - an underwater volcano in the Tongan archipelago in the southern Pacific Ocean - violently erupted, sending powerful shockwaves around the world and triggering devastating tsunamis. Until recently, scientists have been unable to reliably measure how tall the towering column of ash and water (the volcanic plume) that was ejected into atmosphere was. 



Now, by using satellite-based images, a team of researchers from the <a href="https://www.ox.ac.uk/">University of Oxford</a> has discovered that this volcano produced the highest-ever recorded plume, which has broken through to the mesosphere layer of the atmosphere. 



Usually, since in the troposphere (the atmosphere’s lowest layer), temperature decreases with height, how tall a volcanic plume is can be estimated by measuring the temperature recorded at its top and comparing it to a reference vertical temperature profile. However, if the eruption is so large that that the plume penetrates into the next atmospheric layer (the stratosphere), this method becomes unreliable because the temperature begins again to increase with height, due to the ozone layer absorbing UV solar radiation.



To overcome this problem, the scientists used a new method based on a phenomenon called “the parallax effect” (the apparent difference in an object’s position when viewed from multiple perspectives). Since the location of the Tonga volcano is covered by three geostationary weather satellites, the researchers were able to apply the parallax effect to the aerial images these satellites captured. 



The analysis revealed that the plume reached an altitude of 57 kilometers, which is significantly higher than previously documented eruptions, such as the 1991 eruption of Mount Pinatubo in the Philippines (40 km), and the 1982 eruption of El Chichón in Mexico (31 km). 



“It’s an extraordinary result as we have never seen a cloud of any type this tall before. Furthermore, the ability to estimate the height in the way we did (using the parallax method) is only possible now that we have good satellite coverage. It wouldn’t have been possible a decade or so ago,” said study lead author Simon Proud, a research fellow in Satellite Data Analysis at Oxford.



“We’d also like to apply this technique to other eruptions and develop a dataset of plume heights that can be used by volcanologists and atmospheric scientists to model the dispersion of volcanic ash in the atmosphere,” added study co-author Andrew Prata, a postdoctoral fellow in Atmospheric Physics at the same university. “Further science questions that we would like to understand are: Why did the Tonga plume go so high? What will be the climate impacts of this eruption? And what exactly was the plume composed of?”



The study is published in the journal <a href="http://dx.doi.org/10.1126/science.abo4076">Science</a>.



Image Credit: Simon Proud / Uni Oxford, RALSpace NCEO / Japan Meteorological Agency



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Tonga eruption released the highest known volcanic plume

On January 15, 2022, Hunga Tonga–Hunga Haʻapai - an underwater...

In 2019 and 2020, the Siberian Arctic experienced an unusual number of devastating fires, raising concerns in the scientific community, as the Arctic has vast areas of <a href="https://www.earth.com/news/permafrost-could-release-much-more-carbon-than-expected/">permafrost</a> – a permanently frozen layer of subsoil which accumulates large amounts of carbon. The fires significantly damage the permafrost and contribute to the release of carbon emissions in the atmosphere. But was this increase in fires in 2019-2020 an exceptional case or a trend that will become worse as the Arctic warms?



By analyzing satellite observations between 1982 and 2020, a team of researchers led by the <a href="https://www.csic.es/en/csic">Spanish Council for Scientific Research</a> (CSIC) has found that, although these fires were indeed exceptional, global warming will most likely drive increasingly more megafires over the following decades, releasing massive amounts of carbon.



“In 2020 alone, 423 fires were detected in the Siberian Arctic, which burned around three million hectares (an area almost as big as the whole Belgium) and caused the emission of 256 million tons of CO2&nbsp;equivalent [similar to the annual emissions of CO2&nbsp;in Spain]. With future warming, these megafires will be recurrent at the end of the century and will have different implications, both for the Arctic and for the global climate,” said study lead author Adrià Descals, a research scientist at CSIC.



“We detected fires above the 72nd&nbsp;parallel north, more than 600 km north of the Arctic Circle, where fires are unusual and where winter ice was still visible at the time of burning. Many fires were detected with a few days of difference, so we hypothesize that increases in thunderstorms and lightning are the main cause of the fires, although further investigations would be required to demonstrate how much human activities may influence the fire season in this remote region.”



According to the scientists, the concatenation of several factors related to rising temperatures, such as drier weather conditions, longer summers, and more vegetation, is what generated the fire rate increase, and will likely increase the frequency of such events in the future.



“The fact that there is more and earlier vegetation reduces the availability of water in the soil, and plants suffer greater water stress,” said Aleixandre Verger, a researcher at CSIC. In turn, “extreme heat waves, such as in 2020 in the Siberian Arctic, increase vulnerability to drought, as they can desiccate plants and reduce peat moisture, and therefore increase the intensity of fires and carbon emissions.”



“Climate warming therefore has a double effect on fire risk: it increases the susceptibility of vegetation and peatlands to fire and, on the other hand, it increases the number of ignitions caused by thunderstorms,”&nbsp;added Descals.



“The areas burned in 2019 and 2020 could be exceptional events, but recent temperature trends and projected scenarios indicate that, by the end of the century, large fires such as those in 2019 and 2020 will be frequent if temperatures continue to increase at the current rate,” the scientists concluded.



The study is published in the journal <a href="http://dx.doi.org/10.1126/science.abn9768">Science</a>.



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Arctic warming will increase permafrost megafires

In 2019 and 2020, the Siberian Arctic experienced an unusual...

Gut microbes have received an increasing amount of attention in research literature recently, as scientists begin to understand the link between their diversity and the health of their host. Most of this research has focused on humans, where a functional gut <a href="https://www.earth.com/news/covid-disrupts-gut-health-increasing-risk-of-other-infections/">microbiome</a> has been associated with enhanced nutrition, immunity and mental health, among others. In contrast, not much research has investigated gut microbes in wild animals, despite the fact that microbial diversity may be an indicator of the health of wild animals and even of the environments in which they live.



A new study has now analyzed the microbial communities present in the guts of wild American pine marten (Martes americana) living in two different areas. Pine marten are carnivorous mammals of the family Mustelidae, related to weasels, ferrets and mink. They are found throughout Canada, Alaska and the northern United States. In the study, the gut microbiomes of marten living in a pristine habitat were compared with those of marten from a natural habitat that was more heavily influenced by human activity.&nbsp;



The researchers collected gut microbiome data from 21 marten for this study. Sixteen individuals were harvested during a legal trapping season, in an area that was closer to human habitation and influence. The remaining five were trapped safely and released in the Huron Mountain Club, which is a pristine forest area located in Michigan’s Upper Peninsula. The results, published <a href="https://journals.plos.org/plosone/">PLoS ONE</a>, identified distinct differences between the two groups of marten sampled.



“Our goal here was to determine how, if at all, human disturbance of a landscape affects the gut microbiome of American marten that live in that landscape,” says Diana Lafferty, co-lead author of the paper and an assistant professor of biology at Northern Michigan University. “And the answers here were pretty clear.”



“Specifically, we found that wild marten in relatively undisturbed environments have more carnivorous diets than martens in human-affected areas,” says Erin McKenney, co-lead author of a paper on the work and an assistant professor of applied ecology at <a href="https://www.ncsu.edu/">North Carolina State University</a>.&nbsp;



Previous studies on gut microbiomes have focused largely on the variation exhibited in humans and laboratory organisms. Only recently has interest grown in the host-gut bacterial associations in wildlife species, and very little research has been conducted comparing the gut microbes of conspecifics that inhabit different natural environments. Several factors have been implicated in shaping the gut microbial communities in animals, including host genotype, life history traits and behavior, social organization, health status, diet and the environment itself.



“In conjunction with our other work on carnivore microbiomes, this finding tells us the microbial ecosystems in carnivore guts can vary significantly, reflecting a carnivore’s environment,” McKenney says. “Among other things, this means we can tell how much humans are impacting an area by assessing the gut microbiomes of carnivores that live in that area – which can be done by testing wild animal feces. In practical terms, this work is revealing a valuable tool for assessing the health of wild ecosystems.”



The researchers found that the gut microbiomes of marten in the pristine forest of the Huron Mountain Club were clearly distinct from those of the marten harvested in other areas. The finding highlights an emerging tool that will allow researchers and wildlife managers to assess the health of wild ecosystems.



“The Huron Mountain Club is particularly important for this study, because it’s relatively pristine – one of the largest, primeval forests in the eastern United States,” Lafferty says. “That makes it an excellent juxtaposition to the 16 marten that were harvested, since those were collected in regions that are more impacted by human activity.”



“This reflects the fact that marten in relatively pristine forest are able to forage at a higher trophic level, meaning they occupy a higher place in the food web,” Lafferty says. “In other words, the marten in relatively pristine forest have a more carnivorous diet, whereas marten in areas where there are more people were more omnivorous. Basically, the findings tell us a disturbed landscape results in a significantly different diet, which is reflected in their gut microbiomes.”



“It’s also worth noting that we were able to trap and release the marten in Huron Mountain Club during the dead of winter because we designed and built custom box traps to protect them from the elements,” says Chris Kailing, a co-author of the paper who worked on the project while at Northern Michigan University. “That’s of interest because it makes winter sampling possible for future wildlife research even in harsh winter conditions.”



“This is the latest chapter in an ongoing body of research that is helping us understand carnivore gut microbiomes,” McKenney says. “Carnivore gut microbiomes are inherently more variable than the gut microbiomes of other animals. This study lends nuance to the emerging picture that all of this variability is not just noise. Rather, this variability stems from the nutritional landscape carnivores have access to – and that, in turn, reflects the health of the ecosystem carnivores inhabit. And that means that monitoring the gut microbiome of wild carnivores can offer us real insight into the ecosystems those carnivores live in.”



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Carnivore gut microbes reflect the health of wild ecosystems

Gut microbes have received an increasing amount of attention in...

According to the latest<a href="https://ipbes.net/global-assessment">&nbsp;Global Assessment Report on Biodiversity and Ecosystem Services</a>, climate change is currently emerging as a major threat for biodiversity, with plant and animal species facing greater risks of thermal stress as global warming pushes temperatures beyond their usual thermal tolerance. 



Now, a team of researchers led by the <a href="http://english.iap.cas.cn/">Institute of Atmospheric Physics of the Chinese Academy of Sciences</a> (IAP) has found that terrestrial <a href="https://www.earth.com/news/climate-change-impacts-biodiversity-in-protected-areas-worldwide/">protected areas</a> not only offer habitat, but also provide a thermal buffer against climate change, thus serving as refugia for biodiversity.&nbsp;



The scientists discovered that, when compared to nonprotected areas which are often disturbed or even converted to other land uses, protected areas of natural and semi-natural vegetation can effectively cool the land surface temperature. For instance, such areas cool the local daily maximum temperature in the tropics, and reduce diurnal and seasonal temperature ranges in temperate and boreal regions. 



Moreover, vegetation in these areas has a higher amount of foliage in the canopy than in nonprotected areas (even of the same vegetation type), thus modulating local temperatures through physiological and biophysical processes.



“The cooling effect of protected areas on daily and seasonal maximum temperatures is particularly important because it can protect species in the wild from episodes of extreme heat,”&nbsp;explained study senior author Gensuo Jia, an expert in the impact of climate change on ecosystems at IAP. “Under a warming climate, as heatwaves are becoming more frequent and more intense, protected areas create thermal refugia.”



According to the researchers, biodiversity responses to climate change are determined by microclimate – the local set of atmospheric conditions near the ground that is modulated by habitats and landscape features at the local scale. Thus, protected areas provide shaded habitats which can moderate biotic responses to macroclimate warming.



While nature conservation has long been recognized as a nature-based solution to climate change, helping prevent carbon emissions from land-use change and enhancing carbon removal from the atmosphere, this study shows that the effectiveness of nature protection in stabilizing local climates cannot be ignored. According to the scientists, protected forests effectively slow the rate of warming, with a warming rate in protected boreal forests up to 20 percent lower than in surrounding regions.



“The slowed rate of warming is particularly important for species in the boreal regions because the northern high latitudes have warmed faster than the rest of the world,”&nbsp;said lead author Dr. Xiyan Xu, an expert in climate change at IAP. “Protected areas provide a home for threatened species, and the home is air-conditioned naturally!”



The findings suggest that protected areas can significantly contribute to climate change mitigation and highlight the need to tackle the climate and biodiversity crises simultaneously.



The study is published in the journal <a href="http://dx.doi.org/10.1126/sciadv.abo0119">Science Advances</a>.&nbsp;



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By <a href="mailto:andrei.ionescu5891@gmail.com">Andrei Ionescu</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Protected areas provide a thermal buffer against climate change

According to the latest&nbsp;Global Assessment Report on Biodiversity and Ecosystem...

Aerial,View,Of,Amazon,Rainforest,,South,America

The central Congo Basin is home to the world’s largest tropical <a href="https://www.earth.com/news/sea-level-rise-can-increase-fires-in-tropical-peatlands/">peatland</a> complex, covering an area of around 16.7 million hectares, which is bigger than the area of England and Wales combined. Unlike temperate peat bogs that mostly accumulate carbon in the form of mosses, these peatlands underlie lush tropical forests and contain organic matter from the fall of leaves and forest debris. In addition, they are influenced by the movement of water from rivers and have been a source of food and resources for local people for thousands of years.&nbsp;&nbsp;



The Congo Basin spans across six central African countries, but the peatlands occur mostly within the Republic of Congo (ROC) and the Democratic Republic of Congo (DRC). Due to the remote and inaccessible location of these peatlands, little research has been done on how the ecosystems function, although a previous study estimated that 29 Pg of carbon is stored below ground in peat across the region. (A Petagram is equivalent to a Gigaton and equals one billion metric tons.)&nbsp;



With the uncertainties surrounding the effects of climate change, scientists are concerned that this massive amount of stored carbon may be released into the atmosphere and contribute further to greenhouse gas concentrations. In order to understand the history of the Congo Basin peatlands, Congolese and European researchers have now taken samples of peat from beneath the remote swamp forests in the region. The results of their analysis, published in the journal Nature, carry a sober warning for the entire world, particularly as environmental leaders gather at the COP27 climate talks next week.



The research, led by scientists from the <a href="https://www.leeds.ac.uk/">University of Leeds</a>, involved analyzing plant remains in samples taken at depths beneath the surface of the peat. The scientists used waxes from plant leaves preserved in the samples to calculate the rainfall levels at the time that the plants were living. This enabled them to reconstruct a record of the vegetation and rainfall in the central Congo Basin over the last 17,500 years, from when the peat began to form.&nbsp;



The record showed that peat was accumulated gradually in the region up to around 7,500 years ago. During this time, the peat acted as a store of carbon. However, between 7,500 and 2,000 years ago, the peat layers either decomposed or never accumulated. The researchers described this as the “ghost interval." This same ghost interval was found in peat samples from hundreds of kilometers away in the DRC indicating it happened across the whole peatland region.&nbsp;



“The peat samples show us that there was a period of around 5,000 years when there was almost no build-up of peat, less than 0.1 mm per year.&nbsp;The samples also reveal what the rainfall and vegetation was like when the peat was formed. Together they give a picture of a drying climate that got progressively drier until about 2,000 years ago," explained study lead author Dr. Yannick Garcin of the National Research Institute for Sustainable Development of France.



At the height of this drought, rainfall was reduced by at least 800 mm a year. This caused the water table in the Congo peatlands to drop, exposing older layers of peat to the air, which led to decomposition and the release of carbon dioxide.&nbsp;The peatlands&nbsp;only&nbsp;stopped releasing carbon and reverted back to&nbsp;taking carbon out of the atmosphere when the&nbsp;climate&nbsp;got wetter&nbsp;again&nbsp;in the past 2,000 years, according to the results of the study.&nbsp; &nbsp;



“This drought led to a huge loss of peat, at least 2 meters,” said Dr. Garcin. “The drought flipped the peatland to a huge carbon source as the peat decomposed. This decomposition only stopped when the drought stopped, allowing peat to start accumulating again.”&nbsp;



The scientists warn&nbsp;that, while the peatlands are&nbsp;currently largely intact and managed sustainably by local people, they are vulnerable.&nbsp;If current global warming produces drying effects in the Congo region, history could repeat itself and 30 billion tons of carbon from decomposing peat could end up in the atmosphere. This is equivalent to all the emissions from burning fossil fuel globally over a three-year period, and the impact on climate change could be catastrophic.&nbsp;



“Our study brings a brutal warning from the past. If the peatlands dry beyond a certain threshold they will release colossal quantities of carbon to the atmosphere, further accelerating climate change," said study senior author Professor Simon Lewis. “There is some evidence that dry seasons are lengthening in the Congo Basin, but it is unclear if these will continue. But evidence from our study shows that drier conditions have existed in the past and did trigger a breakdown of the peatlands as a store of carbon.”&nbsp;



“This is an important message for world leaders gathering at the COP27 climate talks next week. If greenhouse gas emissions drive the central Congo peatlands to become too dry, then the peatlands will contribute to the climate crisis rather than protect us," emphasized Professor Lewis.



In addition to the threat of the peatlands getting drier&nbsp;from climate change, the region is subject to additional pressures which could cause damage to the fragile peatland ecosystem. These include draining the peatlands for industrial-scale agriculture, logging, and oil exploration.&nbsp;The central Congo peatlands are home to a rich biodiversity, including forest elephants, lowland gorillas, chimpanzees and bonobos, all of which form part of this globally important but threatened ecosystem.



Professor Corneille Ewango from the University of Kisangani in the Democratic Republic of the Congo, led the expeditions to collect the peat samples from the DRC.&nbsp;



“This is another astonishing finding about the peatlands. They are more vulnerable than we thought, and everyone must play their role in protecting them," said Professor Ewango. “Polluting countries must cut their carbon emissions fast, to limit the possibility of droughts pushing the peatlands past their tipping point. The DRC will also need to strengthen protection of the peatlands. At stake is one of the most wildlife and carbon-rich ecosystems on Earth."



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By <a href="mailto:bosman@truewan.co.za">Alison Bosman</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

The Congo Basin could release billions of tons of carbon

The central Congo Basin is home to the world’s largest...

Experts have identified a new method of using compost that could boost global crop production and help mitigate climate change. Professor Susanne Schmidt of the <a href="https://www.uq.edu.au/">University of Queensland</a> explained that adopting a Precision Compost Strategy (PCS) in large-scale <a href="https://www.earth.com/news/agriculture-could-play-a-key-role-in-limiting-global-warming/">agriculture</a> could improve crop yield and soil health, and would keep biowaste from ending up in the landfill where it releases harmful greenhouse gases.



“Instead of relying just on mineral fertilisers, PCS involves supplementing the right type of compost with nutrients to match the needs of soils and crops,” said Professor Schmidt.



“Soils that have become compacted and acidic are then aerated and neutralized. The result is they can retain more water, facilitate root growth and nourish the organisms that keep soils and crops healthy.”



According to Professor Schmidt, soil plays a crucial role in ensuring global food security. “But currently 30 percent of the world’s agricultural soil is classified as degraded, with projections that this could rise to 90 percent by 2050."



The researchers estimate that precision compost could boost the annual global production of major cereal crops by 96 million tons. “This has flow-on effects for consumers by addressing food shortages and price hikes," said Professor Schmidt.



The study also suggests that applying a precision compost strategy to large-scale agriculture could help mitigate climate change.



“In Australia alone, more than 7 million tons of biowaste ends up in landfill every year where it generates huge amounts of avoidable greenhouse gases and other undesirable effects,” said Professor Schmidt.



“If we repurpose it, we can restore crucial carbon in cropland topsoil. There are cost benefits too - diverting just 15,000 tons of biowaste could save a local council as much as $2-3 million a year.”



Tony Rossi is a sugarcane farmer in North Queensland. His family's company V. Rossi &amp; Sons has been using precision compost for seven years. “We’ve been able to almost halve our fertilizer use which is so much better for the environment, and our crop yield is the same,” said Rossi.



The research was supported by Fight Food Waste CRC and is published in the journal <a href="http://dx.doi.org/10.1038/s43016-022-00584-x">Nature Food</a>.



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Compost could boost crop yields by millions of tons

Experts have identified a new method of using compost that...

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Today’s Video of the Day from <a href="https://www.igb.illinois.edu/">Carl R. Woese Institute for Genomic Biology</a> reveals how scientists can modify common crops like soybean, rice, and wheat to protect them from heat stress.



“We need to double crop production by 2050 to feed a growing global population, and not only are we not on track to do that, but climate change is further complicating things,” said Amanda Cavanagh, a lecturer at the University of Essex. 



The study is part of Realizing Increased Photosynthetic Efficiency (RIPE), an international research project that aims to develop food crops that turn the sun’s energy into food more efficiently.



“Using an engineering approach we designed multiple alternative metabolic pathways to photorespiration. Testing them in the field showed increases in productivity which led Amanda to significantly move the project forward by showing our engineered plants can withstand pretty extreme temperature stress,” said study co-author and RIPE researcher Paul South.&nbsp;



“As the climate changes and temperature stresses increase the pressure on our global food supply, farmers will need every tool available including engineering approaches like the synthetic biology used here to maintain safe and productive harvests.”



The experts tested plants modified to have more efficient photorespiration to see if they were better adapted to warmer temperatures.&nbsp;



The team found that the engineered plants produced 26 percent more biomass than the wild-type plants exposed to the same temperatures, and had 15 percent less yield loss under the higher temperatures.



Video Credit: Amanda Nguyen/University of Illinois



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Designing crops that can beat the heat

[sendtonews key="QGPzYnXEtN-1712599-12187" type="single"] Today’s Video of the Day from Carl...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes the first comprehensive estimate of carbon density in the Saharan, Sahel, and Sudanian zones of Africa. In an effort to measure the amount of carbon stored across these drylands, a team of scientists used high-resolution satellite images and artificial intelligence to map nearly 10 billion individual trees. 



"The high spatial resolution (50 cm) combined with AI and field measurements used in this study is key to improving tree inventories in drylands," said Pierre Hiernaux, a French researcher working for NASA. "The ever-increasing availability of very high-resolution satellite imagery will make it possible to assess carbon pools and their dynamics at the individual tree level on a global scale."



"This study is exceptional because it is pioneering a type of approach that will revolutionize the monitoring of trees and forests on a global scale: in the short term, it will be possible to map the world's trees from the centre of the Amazon to our schoolyards," said <a href="https://www.inrae.fr/en">INRAE</a> researcher Jean-Pierre Wigneron.



"Many fields of application will become much more efficient and accurate, such as tracking carbon stocks, biodiversity, monitoring logging and protection against illegal forest degradation, in near real time.”



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



Check us out on <a href="https://www.earth.com/earthsnap/">EarthSnap</a>, a free app brought to you by Eric Ralls and Earth.com.

Remote sensing will revolutionize the way we monitor trees

[sendtonews key="EjmSP20gQK-2593093-12187" type="single"] Today's Video of the Day from NASA...

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Lesotho: Africa's "Kingdom in the Sky" Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features northwest Lesotho in South Africa.



According to ESA, Lesotho is the only nation in the world that lies completely above 1,000 m in elevation. The country is famous for its tall mountains and narrow valleys, and is known as Africa's "Kingdom in the Sky."



Out of a population of around two million people, about 80 percent live in rural areas. More than 75 percent of these people are engaged in <a href="https://www.earth.com/news/climate-change-will-have-a-global-impact-on-agriculture/">agriculture</a>, including rainfed cereal production and animal grazing.&nbsp;



ESA reports that the country’s agricultural system faces a growing number of issues, with climate-related vulnerabilities such as drought, floods and extreme temperatures occurring more frequently. 



Diamonds are amongst the minerals found in the mountains. Indeed, Lesotho can truly be called the Kingdom in the Sky. Beautiful, culturally rich, safe, affordable, and easily accessible from Durban and Johannesburg, mountainous Lesotho is a vastly underrated travel destination. the Kingdom of Lesotho (Sotho: 'Muso oa Lesotho) is an enclaved country in southern Africa. It is just over 30,000 km2 (11,583 sq mi) in size and has a population of around 2 million.



Video Credit: ESA&nbsp;&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer 



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Lesotho: Africa's "Kingdom in the Sky"

[sendtonews key="uV9Lh2fQbV-1760058-12187" type="single"] Lesotho: Africa's "Kingdom in the Sky" Today’s...

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> features a visual dataset of.methane emissions from wetlands across the globe. Atmospheric methane levels have reached record highs in recent years, and wetlands are a major source of these emissions.&nbsp;



"Methane is an important greenhouse gas that contributes substantially to global warming. On a molecule by molecule basis, methane is much more efficient at trapping heat than carbon dioxide, the main driver of warming," says NASA.



"Though human activities, including agriculture, oil and natural gas production and use, and waste disposal, collectively contribute the majority of methane to the atmosphere, about a third of total methane emissions comes from wetlands."&nbsp;



According to NASA, understanding methane emissions from wetlands and other natural sources is critically important for scientists and policymakers who are working to combat climate change by reducing emissions from human activities.



Video Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Wetlands are a major source of methane emissions

[sendtonews key="f8fukm28Vz-2491833-12187" type="single"] Today's Video of the Day from NASA...

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Today’s Video of the Day from <a href="https://earthobservatory.nasa.gov/">NASA Earth Observatory</a> reveals the evolution of the Columbia Glacier in southeastern Alaska. Columbia is among the fastest shrinking glaciers in the world, and the video documents its rapid retreat over the years.&nbsp;



Columbia Glacier is a large, multi-branched calving glacier that flows out of the Chugach Mountains to the Prince William Sound.&nbsp;



According to USGS, Columbia had a long history of stability prior to 1980, with a length 41 miles, and small, short-lived advances or retreats.



In the years since 1980, however, satellite images have captured Columbia’s alarming retreat. By using false-color images, scientists can distinguish between snow and ice, open water, vegetation, and rocky debris on the glacier’s surface.



The series of false-color images featured in today's video were acquired over the span of 35 years. You can see that by 2021, the glacier’s main branch had retreated about 15 miles from its initial position.



The Columbia Glacier has also lost more than 50 percent of its volume, mostly due to calving. <a href="https://www.earth.com/video/nasa-reveals-3d-visual-of-an-atmospheric-river/">NASA</a> reports that while climate change likely started the retreat, mechanical processes kept the disintegration going.



The NASA images are provided by Jesse Allen, Robert Simmon, Joshua Stevens, and Lauren Dauphin using data from Landsat satellites, from the U.S. Geological Survey, and data from MODIS on NASA’s Terra satellite. The structure of Columbia’s moraine played a large role in the stability of the glacier before 1980. 



Like other tidewater glaciers, the Columbia built up a moraine over time, and the mixture of ice and rock functioned like a dam keeping out the sea. It was supported on one end by the shoreline and by the underwater terminal moraine at the other.



Video Credit: NASA Earth Observatory/&nbsp; NASA’s Scientific Visualization Studio



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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The rapid retreat of the Columbia Glacier

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes how record-breaking heat expressed itself around the world in 2022.



Scientists have determined that 2022 was the 5th warmest year since 1880. Furthermore, the last nine consecutive years have been the warmest on record.



From devastating floods and wildfires to natural disasters like Hurricane Ian, 2022 showed us yet again how a warming climate affects people across the globe.&nbsp;



"As we look back at 20:22 and years past, we see that each year we better understand the challenges we face and how important it is to meet them," says NASA.



Video/ Image Credit: NASA Goddard



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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2022 illustrated the consequences of a warming climate

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Satellites reveal how Earth's systems are interconnected Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes Earth’s interconnected systems, and how this network is affected by rising temperatures.&nbsp;



During 2020, average global temperatures matched the hottest year on record. The hurricane season was also record-breaking, with many of the storms intensifying at extraordinary speeds. Hot water in the ocean is fuel for hurricanes. The satellite data shows that it's all one interconnected system showing how Satellites reveal how Earth's systems are interconnected.



According to NASA, dust swept up from Northern Africa plays a major role in the formation of hurricanes, and is also a key source of fertilization in the Amazon rainforest. As a result of<a href="https://www.earth.com/news/seagrass-wasting-disease-is-fueled-by-climate-change/"> climate</a> change, dust plumes are expected to decline, which will have an effect on vegetation far away.&nbsp;



Images from Earth-observing satellites show how the world’s plant life is affected by natural disasters, fires, and deforestation. Satellites also reveal how widespread changes in vegetation impact waterways,&nbsp; the climate, air quality. Satellites communicate by using radio waves to send signals to the antennas on the Earth. "Earth From Space" is a groundbreaking two-hour special that reveals a spectacular new space-based vision of our planet. 



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Satellites reveal how Earth's systems are interconnected

[sendtonews key="JbW4VsY53O-1632195-12187" type="single"] Satellites reveal how Earth's systems are interconnected...

Today’s Video of the Day from the <a href="https://welcome.miami.edu/">University of Miami</a> Rosenstiel School of Marine and Atmospheric Science explores how changes in water temperatures have affected tiger shark habitats and movements in the North Atlantic Ocean. The study reveals that rising temperatures have caused the sharks to shift toward the poles over the past 40 years.



“Tiger shark annual migrations have expanded poleward, paralleling rising water temperatures,” explained study lead author Neil Hammerschlag. “These results have consequences for tiger shark conservation, since shifts in their movements outside of marine protected areas may leave them more vulnerable to commercial fishing.”



The researchers analyzed nine years of tracking data from satellite-tagged tiger sharks, combined with four decades of conventional tag and recapture data provided by National Oceanic and Atmospheric Administration (NOAA) Cooperative Shark Tagging Program.



The experts found that during the last decade of record heat, for every one-degree Celsius increase in water temperatures, tiger sharks migrated further poleward by over 400 kilometers. They also migrated two weeks earlier than usual to waters off the northeastern coast of the United States.



“Given their role as apex predators, these changes to tiger shark movements may alter predator-prey interactions, leading to ecological imbalances, and more frequent encounters with humans,” concluded Professor Hammerschlag.



Video Credit: University of Miami Rosenstiel School of Marine and Atmospheric Science



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tiger sharks are shifting poleward as temperatures rise

Today’s Video of the Day from the University of Miami...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> is focused on the melt ponds that emerge during the spring and summer on the Greenland Ice Sheet, which is the largest ice mass in the northern hemisphere.



"Melt ponds are vast pools of open water that form on both sea ice and ice sheets and are visible as turquoise-blue pools of water in this Copernicus Sentinel-2 image," says ESA.



"When snow and ice melts atop glaciers, water flows in channels and streams and collects in depressions on the surface. These melt ponds can speed up the melting of the surrounding ice since they greatly reduce the ice’s ability to reflect sunlight."



"This can create a positive feedback where an increasing number of melt ponds absorb more heat which causes ice cover to melt even faster."



According to ESA, Greenland has been hit with a late-season heatwave that began in early September. This caused the type of melt event that usually occurs in the middle of summer.



"In a recent paper published in Nature Climate Change, scientists found that major sea-level rise from the melting of the Greenland ice cap is now ‘inevitable’ even if the burning of fossil fuels were to halt overnight," says ESA. "Using satellite observations of Greenland ice loss and ice cap from 2000 to 2019, the team found the losses will lead to a minimum rise of 27 cm regardless of climate change."



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Melt ponds on the Greenland Ice Sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes how Earth is unique in our solar system for its ability to sustain liquid water on its surface. But now, the water cycle is shifting as the climate warms, and scientists must find ways to predict how these changes will affect water availability.



Overall, 96 percent of Earth's water is saltwater, and nearly all of freshwater is found in ice and groundwater. These sources of water are linked as it passes through solid, liquid and gas phases.



In a warmer climate, the water cycle will be transformed. It will be easier for water to evaporate and form clouds, and storms will become more frequent and intense. Some regions will get too much water, while others will be left without enough water. In addition, soil moisture will be lost - which threatens food security.



Scientists are using satellite data from over the last 40 years to track changes that are happening in the water cycle. This will ultimately help us prepare for extreme events and better manage our water resources, according to ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Tracking changes in Earth's water cycle

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Saturn,-,High,Resolution,3d,Images,Presents,Planets,Of,The

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard Space Flight Center</a> features images of Saturn from NASA’s Hubble Space Telescope. The photographs capture the start of the mysterious "spoke season" on Saturn - when unexplained features appear on its rings. 



According to NASA, both the cause of the spokes and their seasonal variability have yet to be fully explained by planetary scientists.



"Like Earth, Saturn is tilted on its axis and therefore has four seasons, though because of Saturn's much larger orbit, each season lasts approximately seven Earth years. Equinox occurs when the rings are tilted edge-on to the Sun," explains NASA.



"The spokes disappear when it is near summer or winter solstice on Saturn. (When the Sun appears to reach either its highest or lowest latitude in the northern or southern hemisphere of a planet.) As the autumnal equinox of Saturn's northern hemisphere on May 6, 2025, draws near, the spokes are expected to become increasingly prominent and observable."



Experts believe that the spokes may be a product of the planet's variable magnetic field. When magnetic fields interact with solar wind, an electrically charged environment is created. This phenomenon is visible on Earth as the northern lights.&nbsp;



"Scientists think that the smallest, dust-sized icy ring particles can become charged as well, which temporarily levitates those particles above the rest of the larger icy particles and boulders in the rings," says NASA.



The spokes were first observed in the early 1980s by NASA's Voyager mission. Depending on the angle of the rings, the spokes can appear dark or light.



"Thanks to Hubble's OPAL program, which is building an archive of data on the outer solar system planets, we will have longer dedicated time to study Saturn’s spokes this season than ever before," said NASA senior planetary scientist Amy Simon, head of the Hubble Outer Planet Atmospheres Legacy (OPAL) program.



"Despite years of excellent observations by the Cassini mission, the precise beginning and duration of the spoke season is still unpredictable, rather like predicting the first storm during hurricane season."



Video Credit: NASA Goddard&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Mysterious "spoke season" captured on Saturn

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Closeup,Of,Fresh,Green,The,Napier,Bush,Grass,As,Animal

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Today’s Video of the Day from <a href="http://www.ntu.edu.sg/">NTU Singapore</a> reveals that some plants can remove toxic heavy metals from soil.&nbsp;



The researchers analyzed samples of various tropical plant species to test for levels of heavy metals and metalloids. The study showed that there are existing plants with high levels of these contaminants, which means that these species are great candidates for drawing pollutants out of the soil.&nbsp;



Among the plants examined in the study, 12 species had accumulated several types of heavy metals and metalloids. These plants are widely available, including species that are native to Singapore.



“In a small nation like Singapore, land may be repurposed to support new development plans, so it is important that we have a green and sustainable way to remediate land that is contaminated," said Professor Lam Yeng Ming.



"We set out to uncover how to better make use of tropical plants to do phytoremediation and through advanced characterization techniques, we showed how some of these tropical plant species can be an environmentally friendly and literally a 'green' way to remove contaminants in soil."&nbsp;



"Phytoremediation also has benefits of cost effectiveness, simplicity of management, aesthetic advantages, and long-term applicability and sustainability. The strategy prevents erosion and metal leaching by stabilizing or accumulating heavy metals, so that helps reduce the risk of contaminant spread.”



Video Credit: NTU Singapore



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Plants help remove heavy metals from contaminated soil

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes why herbicides are not as effective in killing weeds anymore. In the 20th century, chemical companies developed thousands of herbicides. The most commonly used herbicide was glyphosate, which was introduced in 1974.



Over the past few decades, dozens of species of weeds have evolved resistance to glyphosate. Depending on the site of action, the part of the plant that an herbicide interacts with, weeds may even be resistant to herbicides that have not been developed yet.&nbsp;



With increasing resistance to glyphosate and other herbicides, weeds are - once again - becoming a major concern for farmers.&nbsp;



Video Credit: American Chemical Society&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Weeds are becoming increasingly resistant to herbicides

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Today’s Video of the Day from the <a href="https://www.jpl.nasa.gov/">NASA Jet Propulsion Laboratory</a> (JPL) describes a dust storm on Mars that was nearly twice the size of the United States. As the storm covered the southern hemisphere of the planet, some of NASA’s explorers had to delay their normal activities.



NASA’s Insight lander put itself in a "safe mode" for 11 days to conserve battery power because solar power was disrupted by the dust. The Ingenuity Mars Helicopter postponed flights until conditions improved.



"A fleet of NASA orbiters monitor Martian dust storms like this one and serve as lifelines to Earth by relaying data from the rovers and lander on the ground back to the team. This includes the Mars Reconnaissance Orbiter, MAVEN, and Odyssey," reports JPL.



"Dust storms like this recent one start close to the ground and are spread by wind as they rise – warming the cold Martian atmosphere."



The images in the video were captured by NASA’s Curiosity as the dust rolled in. A fleet of orbiters monitored the dust storm from above, relaying data from Mars’ explorers back to scientists on Earth.



Video &amp; Image Credit: NASA/JPL-Caltech/ASU/MSSS



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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NASA monitors giant dust storms on Mars

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Today's Video of the Day from the <a href="http://www.esa.int/">European Space Agency</a> features Qeshm Island in the Strait of Hormuz. This strait provides the only sea passage from the Persian Gulf to the open ocean.



Qeshm is separated from the Iranian coast by the Clarence Strait, also known as Khuran.&nbsp;The Hara Forest Protected Area is a network of shallow waterways and forest located between the island and the mainland. This protected region is home to sea turtles, snakes, and more than 150 species of migrating birds.



Qeshm is famous for its wide range of&nbsp;ecotourist&nbsp;attractions, such as the&nbsp;Hara marine forests. According to environmentalists, about 1.5 percent of the world birds and 25 percent of Iran's native <a href="https://www.earth.com/news/female-hummingbirds-avoid-sexual-harassment-by-looking-like-males/">birds</a> annually migrate to the forests, which are the first national geo park in Iran.



Tourists are also drawn to the island to see an age-old Portuguese&nbsp;fort, historic mosques, the&nbsp;Seyyed Mozaffar&nbsp;and&nbsp;Bibi Maryam&nbsp;shrines, and the "Valley of Stars."



The average temperature on the island is 81 degress and the region is often hot and humid. From June to August, the island is described as being oppressively hot. The ideal time to visit is during the winter season. 



Video Credit: ESA&nbsp;



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Qeshm Island in the Strait of Hormuz

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Inhambane Bay in southeast Mozambique.&nbsp;



"Inhambane Bay is a deep inlet into which the small Mutamba River flows," says ESA. "On one side of the bay lies the historical city of Inhambane, capital of the Inhambane Province, while the sister city of Maxixe, the economic capital of Inhambane, sits across from it. The province is the second largest grower of cashews, after Nampula, and it also produces coconut and citrus fruits."



The beaches of Barra and Tofo are popular with tourists. There are also coral reefs along the long coastline of Inhambane, making it an ideal destination for scuba diving and snorkeling.



"Mozambique’s extensive coastline heightens the country’s vulnerability to tropical cyclones that develop in the Indian Ocean as well as storm surge flooding," says ESA.



"More than half of the population lives in low lying coastal areas, putting communities at risk. Inhambane Bay was dangerously close to where Cyclone Idai made landfall in 2019 causing widespread destruction to the country."



Video/ Image Credit: ESA



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Inhambane Bay in southeast Mozambique

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency </a>&nbsp;features the Kangerlussuaq Glacier, one of the largest tidewater outlet glaciers in Greenland. The glacier is located on the east coast of the Greenland ice sheet.



As human-induced climate change continues to drive up temperatures, global ice loss is accelerating at an alarming rate. ESA reports that, over the past decade alone, 3.5 trillion tons of ice have melted from the Greenland ice sheet. This is enough to cover the UK with meltwater 15 meters deep.



Based on satellite imagery, researchers determined that Kangerlussuaq entered a new phase of rapid retreat and acceleration in 2017. In their study, published in <a href="https://www.frontiersin.org/articles/10.3389/feart.2019.00123/full">Frontiers in Earth Science</a>,&nbsp; the experts report that the glacier's ice front is now at its most retreated position since the early 20th century.



"Given Kangerlussuaq’s previous impacts on both the magnitude and pattern of ice sheet wide mass loss, we predict that its new phase of retreat, acceleration and thinning will markedly enhance the south-east region’s contribution to increasing discharge from the ice sheet," wrote the study authors.&nbsp;&nbsp;



"More broadly, accurate forecasting of the ice sheet’s contribution to sea level rise will require a deeper understanding of, and responses to, these non-linear ice dynamic processes."



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Kangerlussuaq Glacier on the Greenland ice sheet

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the complex relationship between ocean and climate. ESA's Climate Change Initiative will help us understand how oceans influence the climate and how climate change is impacting the oceans.&nbsp;



"Earth’s oceans are huge heat stores, soaking up 93% of the excess heat from human activity over the past 70 years. Ocean currents redistribute heat around the planet, from the Equator to the poles. Where this ocean heat goes influences weather patterns and regional climate," explains ESA.



"As well as absorbing heat, oceans are a natural carbon sink, absorbing a quarter of carbon dioxide emissions from human activity. This has led to the acidification of ocean water, threating marine life."



The amount of heat and carbon dioxide soaked up by the ocean depends on specific variables, including phytoplankton, temperatures, waves, salinity, and ice cover. Satellites can be used to measure these variables from space.



"From their unique vantage point, satellites provide key information for understanding the complexities of our planet and monitoring environmental issues," says ESA.



Video Credit: ESA



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By <a href="mailto:csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Editor



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Ocean heat influences regional climate

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> describes the importance of monitoring the shape of the sea surface, which is constantly changing. These observations have many applications, such as ship routing, <a href="https://www.earth.com/news/the-modem-ocean-is-a-tough-place-for-whales-to-survive/">ocean</a> current forecasting, and debris tracking.



"A project supported by the Discovery element of ESA’s Basic Activities recently investigated a new technique to measure sea surface topography very precisely," reports ESA.



"The technique involves looking at satellite navigation (GNSS) signals that have been reflected off of the sea surface at very low angles. At these so-called grazing angles, waves and surface roughness have very little impact on the reflection process; the sea surface acts as a very smooth mirror."



Estel Cardellach is the principal investigator at the Institute for Space Studies of Catalonia, who first submitted the idea for the project.



“In a mirror-like reflection the phase of the signal can be tracked – it is continuous," said Cardellach. "Different surface heights result in different phase measurements. It gives a very precise measurement of the surface altitude at a few centimetres’ precision.”



The researchers developed a GNSS receiver and set up an experiment in the Balaeric Islands to collect signals from the receiver that were reflected off the sea surface. Ultimately, these signals will provide improved measurements of the shape of the sea surface.



Image/ Video Credit: ESA



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring the dynamic shape of the sea surface

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Aerial,Photo,Of,River,In,Amazon,Rainforest,Jungle,In,Peru

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Today’s Video of the Day from <a href="https://www.nasa.gov/goddard">NASA’s Goddard Space Flight Center</a> describes how scientists are using autonomous sound sensors to monitor deforestation in the Amazon. By recording soundscapes, the experts can determine which animals are present through their distinct sounds.&nbsp;



Using this method, sounds can be used as scientific measurements to analyze the effects of deforestation. The researchers will gain a better understanding of how the acoustics of a forest can be used to measure its health.&nbsp;



"From space, parts of the Amazon rainforest that have previously been logged or burned may look lush and green, like a place buzzing with activity and full of sounds. But inside the rainforest, the animal life may tell a different story, of a harsh environment and a quieter soundscape," says NASA.



Video Credit: NASA’s Goddard Space Flight Center&nbsp;



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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Monitoring deforestation in the Amazon through sounds

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