Spaghetti, a word that evokes thoughts of delicious Italian cuisine and hearty meals, has taken on an entirely new meaning in the realm of science.



Imagine strands so impossibly thin they are 200 times slimmer than a human hair -- not destined for marinara sauce but poised to revolutionize fields as diverse as medicine and advanced materials science.



Recently, a team of scientists from University College London (<a href="https://www.ucl.ac.uk/" target="_blank" rel="noreferrer noopener">UCL</a>) has crafted the world’s thinnest strands of material, daintily dubbed "spaghetti" in an attempt to blend the familiar with the extraordinary.



Beatrice Britton, the study's lead author, carried out the work as part of her master’s degree in chemistry at UCL.



“To make spaghetti, you push a mixture of water and flour through metal holes. In our study, we did the same except we pulled our flour mixture through with an electrical charge. It’s literally spaghetti but much smaller,” explained co-author Dr. Adam Clancy from the UCL Department of Chemistry.



However, this remarkable creation isn’t for your dinner plate. Its potential lies in novel applications for wound healing, tissue <a href="https://www.earth.com/news/secrets-of-killifish-regeneration-may-help-us-heal-humans/" target="_blank" rel="noreferrer noopener">regeneration</a>, and drug delivery, thereby setting a new benchmark in nanotechnology.



<h2 class="wp-block-heading" id="h-healing-power-of-spaghetti-nanopasta">Healing power of "spaghetti" nanopasta</h2>



The secret lies in its base material - starch. This <a href="https://www.earth.com/news/eating-refined-carbs-can-make-you-less-attractive/" target="_blank" rel="noreferrer noopener">carbohydrate</a>, accumulated in abundance by green plants, provides us with fascinating prospects for creating nanofibers.



The microscopic mats of nanofibers are permeable enough to permit the passage of water and moisture, while acting as a protective barrier against harmful <a href="https://www.earth.com/news/bacteria-form-memories-and-pass-them-on-to-future-generations/" target="_blank" rel="noreferrer noopener">bacteria</a>. 



“Nanofibers, such as those made of starch, show potential for use in wound dressings as they are very porous,” said Professor Gareth Williams from UCL School of Pharmacy. 



“In addition, nanofibers are being explored for use as a scaffold to regrow tissue, as they mimic the extra-cellular matrix – a network of proteins and other molecules that cells build to support themselves.”



<h2 class="wp-block-heading" id="h-making-spaghetti-nanopasta">Making spaghetti nanopasta</h2>



Nanofibers made from starch offer remarkable potential for applications in <a href="https://www.earth.com/news/increasing-plant-extinction-threatens-the-future-of-medicine-and-human-health/" target="_blank" rel="noreferrer noopener">medicine</a> and industry. 



However, traditional methods for producing these materials rely on extracting and purifying starch from plant cells - a process that demands significant energy and water and raises environmental concerns.



The UCL team has devised an innovative alternative: creating nanofibers directly from starch-rich flour, a widely available and sustainable resource.



<figure class="wp-block-image aligncenter size-full"><a href="https://www.earth.com/wp-content/uploads/2024/11/spaghetti_worlds-thinnest_nanopasta_single-strand_credit-UCL_1m.jpg" target="_blank" rel="noreferrer noopener"><img src="https://www.earth.com/wp-content/uploads/2024/11/spaghetti_worlds-thinnest_nanopasta_single-strand_credit-UCL_1s.webp" alt="Each individual strand is too narrow to be clearly captured by any form of visible light camera or microscope, so the team used a scanning electron microscope, scanning the mat with a focused beam of electrons and creating an image based on the pattern of electrons that are deflected or knocked-off. Credit: Beatrice Britton / Adam Clancy" class="wp-image-1951309"/></a><figcaption class="wp-element-caption">Each individual strand is too narrow to be clearly captured by any form of visible light camera or microscope, so the team used a scanning electron microscope, scanning the mat with a focused beam of electrons and creating an image based on the pattern of electrons that are deflected or knocked-off. Credit: Beatrice Britton / Adam Clancy</figcaption></figure>



Bypassing the need for intensive purification, this approach not only reduces resource consumption but also leverages a common food ingredient in an unexpected and transformative way.



This method represents a shift towards greener nanotechnology, aligning material science innovation with environmental responsibility.



<h2 class="wp-block-heading" id="h-future-of-spaghetti-nanopasta">Future of spaghetti nanopasta</h2>



The researchers are optimistic about the future of these ultra-thin nanofibers, especially when they are made using starch-rich flour as a starting material.



“Starch is a promising material to use as it is abundant and renewable -- it is the second largest source of biomass on Earth, behind cellulose -- and it is biodegradable, meaning it can be broken down in the body,” said Dr. Clancy.



However, the process of creating nanofibers from flour is not without challenges. Impurities such as proteins and cellulose increase the mixture’s viscosity, making fiber formation more difficult.



The study highlights how using formic acid instead of water effectively breaks down the giant starch helices, allowing the creation of nanofibers. 



The researchers also carefully controlled the mixture’s temperature during preparation to achieve the right consistency. 



This novel approach not only simplifies the process but also opens the door to sustainable and scalable production methods.



<h2 class="wp-block-heading" id="h-why-does-any-of-this-matter">Why does any of this matter?</h2>



While the team has made significant progress, much work remains to fully explore the potential of this "healing spaghetti." 



“We’ve shown that a simpler way to make nanofibers using flour is possible. The next step would be to investigate the properties of this product. We would want to know, for instance, how quickly it disintegrates, how it interacts with cells, and if you could produce it at scale,” explained Dr. Clancy.



The versatility of these nanofibers opens the door to applications beyond medicine, potentially transforming areas such as environmental engineering and biodegradable materials.



Despite the promise of starch-based nanofibers in medicine and industry, their culinary applications remain out of reach. 



“I don’t think it’s useful as pasta, sadly, as it would overcook in less than a second, before you could take it out of the pan,” Professor Williams stated humorously.



The researchers plan to continue refining the electrospinning process and exploring the properties of their nanofibers to determine their viability for practical applications. 



For now, the world's thinnest "spaghetti" stands as a remarkable example of the creativity and ingenuity of modern <a href="https://www.earth.com/video/astronauts-are-studying-materials-science-in-space/" target="_blank" rel="noreferrer noopener">materials science</a>.



The study is published in the journal <a href="https://pubs.rsc.org/en/content/articlelanding/2024/na/d4na00601a">Nanoscale Advances</a>.



Image Credit: Beatrice Britton / Adam Clancy



-----



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World’s thinnest spaghetti 'nanopasta' could heal wounds and regrow tissues

Spaghetti, a word that evokes thoughts of delicious Italian cuisine and hearty meals, has taken on an entirely new meaning in the realm of science. Imagine strands so impossibly thin they are 200 times slimmer than a human hair -- not destined for marinara sauce but poised to revolutionize fields as diverse as medicine and advanced materials science. Recently, a team of scientists from University College London (UCL) has crafted the world’s thinnest strands of material, daintily dubbed "spaghetti" in an attempt to blend the familiar with...

Fate of primeval Bialowieza Forest hangs in the balance. It is the last remaining relic of an ancient forest that stretched for millennia across the lowlands of Europe and Russia, a shadowy, mossy woodland where bison and lynx roam beneath towering oak trees up to 600 years old.
Conservationists believe the fate of the Bialowieza Forest, which straddles Poland and Belarus, is more threatened that at any time since the communist era due to a new Polish government plan for extensive logging in parts of the forest. The plan has pitted the government against environmentalists and many scientists, who are fighting to save the UNESCO world heritage site.
Seven environmental groups, including Greenpeace and WWF, have lodged a complaint with the European Commission hoping to prevent the largescale felling of trees, which is due to begin within days. Bialowieza has been declared a Natura 2000 site, meaning it is a protected area under European law. EU officials say they are working with the Polish authorities to ensure that any new interventions in the forest are in line with their regulations, but it's not yet clear what the result will be.
The preservation of Bialowieza is such a sensitive matter that IKEA, which relies on Polish timber for 25 percent of its global furniture production, vowed years ago not to buy any wood from Bialowieza.
"This forest is a Polish treasure but it is also the world's treasure, and we could lose it," said Katarzyna Kosciesza from ClientEarth, one of the groups that filed the complaint. "The logging would really threaten it."
The forest plan is one of many controversial changes that have come with the election last year of a conservative populist party, Law and Justice. The new authorities have been accused by the European Union and human rights groups of eroding democracy and the rule of law.
The party's powerful leader, Jaroslaw Kaczynski, says he's on a mission to remake the country from top to bottom in line with the party's conservative Catholic and patriotic ideology. Since taking power in November, Poland's government has moved quickly to push broad changes in everything from cultural institutions to horse breeding farms and forestry management.
The government argues they are fixing the country by removing the corrupt influences of former communists and pro-Europeans who have held power in recent years.
In the case of Bialowieza, government officials are blaming their predecessors for financial losses from the strict limits on logging. The environment minister, Jan Szyszko, also faulted them for getting the UNESCO world heritage designation, which brings some international oversight.
About 35 percent of the forest on the Polish side includes a national park and reserves, strictly protected zones that the government does not plan to touch. Officials argue the planned logging is not harmful because it will take part only in "managed" parts of the forest that have already been subject to logging in the past. But environmentalists say the logging plan is so extensive it would inevitably lead to the destruction of old-growth areas.
About half of the forest is still considered pristine, meaning those areas have never faced significant intervention since the forest's formation some 8,000 to 9,000 years ago after the end of the last ice age. That has left it with a complex diversity of species unknown in the second-growth forests elsewhere in Europe's lowlands.
That so much has survived is thanks to past Polish and Lithuanian monarchs and Russian czars, who kept it as a royal hunting preserve. Only in the last 100 years has it begun to face logging and human encroachment.
Szyszko last week dismissed 32 of 39 scientific experts on the State Council for Nature Conservation after they criticized the logging plan. They have since been replaced by people who mainly come from the forestry and hunting sectors that favor greater wood extraction. They council's new leader, Wanda Olech-Piasecka, also supports limited commercial hunting of bison, an endangered species.
Szyszko said the new council "will work effectively for the use of natural resources for the benefit of man, which is consistent with the concept of sustainable development."
The Environment Ministry argues the logging is needed to stop the spread of bark beetle, which has killed off 10 percent of the spruce trees in the park - 3 percent of the trees overall - in an outbreak that began in 2013.
However, scientists believe that is merely a pretext, and that what officials really want are the profits from felling such old-growth wood.
Scientists and environmentalists who oppose the logging plan say removing the dead wood upsets the ecosystem. The dead spruces host thousands of other species, worms and insects and fungi, which then become food for birds, while hollow dying trunks create nesting spaces. Among those who rely on the dead spruces are the pygmy owl, the smallest owl species in Europe, and the three-toed woodpecker, which has a precarious existence in Bialowieza.
Thanks to the bark beetle outbreak, the numbers of the three-toed woodpecker have doubled or possibly tripled, said Rafal Kowalczyk, director of the Mammal Research Institute with the Polish Academy of Sciences.
Scientists fighting the logging say the death of some spruce trees is making way for an increase of other species like hornbeam and lime and is part of the forest's natural adaptation to climate change, as conditions grow warmer and drier. They also say that it would be necessary to kill 80 percent of infected trees simply to slow the outbreak, which is not logistically possible.
Kowalczyk says the bark beetle outbreaks, which have long been a part of the forest cycle, have never threatened its existence before and won't now. Fate of primeval Bialowieza Forest hangs in the balance
"This forest has been shaped for thousands of years by nature," Kowalczyk added. "It is really unique and we should not turn it into a managed forest. There are many other managed forests but this relic of an ancient forest, with its high diversity, shows us what <a href="http://www.earth.com/news/mangrove-forests-face-a-triple-threat-to-their-survival/">forests</a> looked like hundreds, even thousands, of years ago."
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Fate of primeval Bialowieza Forest hangs in the balance

Fate of primeval Bialowieza Forest hangs in the balance. It...

Explaining sea ice cover differences at<a href="http://www.earth.com/news/hurricanes-are-getting-stronger-as-earth-gets-warmer/"> Earth'</a>s pole Why has the sea ice cover surrounding Antarctica been increasing slightly, in sharp contrast to the drastic loss of sea ice occurring in the Arctic Ocean? A new NASA-led study finds the geology of Antarctica and the Southern Ocean are responsible.

A NASA/NOAA/university team led by Son Nghiem of <a href="https://en.wikipedia.org/wiki/NASA">NASA's</a> Jet Propulsion Laboratory, Pasadena, California, used satellite radar, sea surface temperature, land form and bathymetry (ocean depth) data to study the physical processes and properties affecting Antarctic sea ice. They found that two persistent geological factors -- the topography of Antarctica and the depth of the ocean surrounding it -- are influencing winds and ocean currents, respectively, to drive the formation and evolution of Antarctica's sea ice cover and help sustain it.

"Our study provides strong evidence that the behavior of Antarctic sea ice is entirely consistent with the geophysical characteristics found in the southern polar region, which differ sharply from those present in the Arctic," said Nghiem.

Antarctic sea ice cover is dominated by first-year (seasonal) sea ice. Each year, the sea ice reaches its maximum extent around the frozen continent in September and retreats to about 17 percent of that extent in February. Since the late 1970s, its extent has been relatively stable, increasing just slightly; however, regional differences are observed.

[caption id="attachment_2391593" align="alignleft" width="150"]<img class="size-thumbnail wp-image-2391593" src="http://cff1.greenatom.net/uploads/2016/05/23090915/antarctic-sea-ice-depth-2014_1big_nasa-150x150.jpg" alt="Location of the southern Antarctic Circumpolar Current front (white contour)" width="150" height="150" /> Location of the southern Antarctic Circumpolar Current front (white contour)[/caption]

Over the years, scientists have floated various hypotheses to explain the behavior of Antarctic sea ice, particularly in light of observed global temperature increases. Are changes in the ozone hole involved? Could fresh meltwater from Antarctic ice shelves be making the ocean surface less salty and more conducive to ice formation, since salt inhibits freezing? Are increases in the strength of Antarctic winds causing the ice to thicken? Something is protecting Antarctic sea ice, but a definitive answer has remained elusive.

To tackle this cryospheric conundrum, Nghiem and his team adopted a novel approach. They analyzed radar data from NASA's QuikScat satellite from 1999 to 2009 to trace the paths of Antarctic sea ice movements and map its different types. They focused on the 2008 growth season, a year of exceptional seasonal variability in Antarctic sea ice coverage.

Their analyses revealed that as sea ice forms and builds up early in the sea ice growth season, it gets pushed offshore and northward by winds, forming a protective shield of older, thicker ice that circulates around the continent. The persistent winds, which flow downslope off the continent and are shaped by Antarctica's topography, pile ice up against the massive ice shield, enhancing its thickness. This band of ice, which varies in width from roughly 62 to 620 miles (100 to 1,000 kilometers), encapsulates and protects younger, thinner ice in the ice pack behind it from being reduced by winds and waves.

The team also used QuikScat radar data to classify the different types of Antarctic sea ice. Older, thicker sea ice returns a stronger radar signal than younger, thinner ice does. They found the sea ice within the protective shield was older and rougher (due to longer exposure to wind and waves), and thicker (due to more ice growth and snow accumulation). As the sea ice cover expands and ice drifts away from the continent, areas of open water form behind it on the sea surface, creating "ice factories" conducive to rapid sea ice growth.

[caption id="attachment_2391592" align="alignleft" width="150"]<img class="size-thumbnail wp-image-2391592" src="http://cff1.greenatom.net/uploads/2016/05/23090908/antarctic-sea-ice-depth-2009_2big_nasa-150x150.jpg" alt="Map of sea surface temperatures in Antarctica" width="150" height="150" /> Map of sea surface temperatures in Antarctica[/caption]

To address the question of how the Southern Ocean maintains this great sea ice shield, the team combined sea surface temperature data from multiple satellites with a recently available bathymetric chart of the depth of the world's oceans. Sea surface temperature data reveal that at the peak of ice growth season, the boundary of the ice shield remains behind a 30-degree Fahrenheit (-1 degree Celsius) temperature line surrounding Antarctica. This temperature line corresponds with the southern Antarctic Circumpolar Current front, a boundary that separates the circulation of cold and warm waters around Antarctica. The team theorized that the location of this front follows the underwater bathymetry.

When they plotted the bathymetric data against the ocean temperatures, the pieces fit together like a jigsaw puzzle. Pronounced seafloor features strongly guide the ocean current and correspond closely with observed regional Antarctic sea ice patterns. For example, the current stays near Bouvet Island, located 1,000 miles (1,600 kilometers) from the nearest land, where three tectonic plates join to form seafloor ridges. Off the coast of East Antarctica, the -1 degree Celsius sea surface temperature lines closely bundle together as they cross the Kerguelen Plateau (a submerged microcontinent that broke out of the ancient Gondwana supercontinent), through a deep channel called the Fawn Trough. But those lines spread apart over adjacent deep ocean basins, where seafloor features are not pronounced. Off the West Antarctica coast, the deep, smooth seafloor loses its grip over the current, allowing sea ice extent to decrease and resulting in large year-to-year variations.

Study results are published in the journal Remote Sensing of Environment. Other participating institutions include the Joint Institute for Regional Earth System Science and Engineering at UCLA; the Applied Physics Laboratory at the University of Washington in Seattle; and the U.S. National/Naval Ice Center, NOAA Satellite Operations Facility in Suitland, Maryland. Additional funding was provided by the National Science Foundation.

NASA uses the vantage point of space to increase our understanding of our home planet, improve lives and safeguard our future. NASA develops new ways to observe and study Earth's interconnected natural systems with long-term data records. The agency freely shares this unique knowledge and works with institutions around the world to gain new insights into how our planet is changing.

QuikScat was built and is managed by JPL. For more information, visit:

<a href="http://winds.jpl.nasa.gov/missions/quikscat/" target="_blank" rel="noopener noreferrer">http://winds.jpl.nasa.gov/missions/quikscat/</a>

For more information about NASA's Earth science activities, visit:

<a href="http://www.nasa.gov/earth" target="_blank" rel="noopener noreferrer">http://www.nasa.gov/earth</a>

Explaining sea ice cover differences at Earth's pole

Explaining sea ice cover differences at Earth's pole Why has...

UN alarmed by 12th straight global monthly heat record. The United Nations has expressed alarm after scientists recorded the 12th straight <a href="https://www.bing.com/search?q=gobal&amp;cvid=8191859b3cee430eb198e0b4e1b1430f&amp;FORM=ANAB01&amp;PC=HCTS">global</a> monthly heat record.
The data from the U.S. National Oceanic and Atmospheric Administration released Thursday confirmed earlier readings taken by NASA and the Japan Meteorological Agency. They showed that Earth's average temperature in April was 1.1 degrees Celsius (2 degrees Fahrenheit) higher than the 20th-century average.
A spokeswoman for the World Meteorological Organization said Friday "what's particularly concerning is the margin at which these records are being broken. They are not being broken, they are being smashed and on a fairly consistent basis." UN alarmed by 12th straight global monthly heat record
Spokeswoman Clare Nullis told reporters in<a href="http://www.earth.com/image/the-rhone-river-flowing-into-lake-geneva/"> Geneva</a> that while the records set last year were already alarming, "the heat that we're seeing in 2016 makes 2015 pale by comparison."
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The United Nations (UN) is an <a title="Intergovernmental organization" href="https://en.wikipedia.org/wiki/Intergovernmental_organization">intergovernmental organization</a> that aims to maintain <a class="mw-redirect" title="International peace" href="https://en.wikipedia.org/wiki/International_peace">international peace</a> and <a title="International security" href="https://en.wikipedia.org/wiki/International_security">security</a>, develop friendly relations among nations, achieve international cooperation, and be a centre for harmonizing the actions of nations. It is the largest, most familiar, most internationally represented and most powerful intergovernmental organization in the world.The UN is <a title="Headquarters of the United Nations" href="https://en.wikipedia.org/wiki/Headquarters_of_the_United_Nations">headquartered</a> on <a title="Extraterritoriality" href="https://en.wikipedia.org/wiki/Extraterritoriality">international territory</a> in <a title="New York City" href="https://en.wikipedia.org/wiki/New_York_City">New York City</a>, with its other main offices in <a title="United Nations Office at Geneva" href="https://en.wikipedia.org/wiki/United_Nations_Office_at_Geneva">Geneva</a>, <a title="United Nations Office at Nairobi" href="https://en.wikipedia.org/wiki/United_Nations_Office_at_Nairobi">Nairobi</a>, <a title="United Nations Office at Vienna" href="https://en.wikipedia.org/wiki/United_Nations_Office_at_Vienna">Vienna</a> and <a title="The Hague" href="https://en.wikipedia.org/wiki/The_Hague">The Hague</a>.

UN alarmed by 12th straight global monthly heat record

UN alarmed by 12th straight global monthly heat record. The...

Relationship between healthy environment and healthy people is critical. The most worrying environmental threats facing the world today range from the rise in diseases transmitted from animals to humans to the increasing accumulation of toxic chemicals in food crops as a result of drought and high temperatures, according to a U.N. report released Friday.
The U.N. Environment Agency's Frontiers report also highlighted the threat to human health posed by the alarming amount of plastic waste in the oceans, and scientific evidence suggesting that losses and damage from climate change are inevitable, with "profound consequences" for ecosystems, people, assets and<a href="https://www.bing.com/search?q=economies&amp;cvid=800c4bf8c1e84a15b8d1afbf39e5cc93&amp;FORM=ANAB01&amp;PC=HCTS"> economies</a>.
The report emphasizes "the critical relationship between a healthy environment and healthy people," and stresses the importance of combatting global warming by moving to a low-carbon future.
According to the report, the 20th century saw dramatic reductions in ecosystems and biodiversity - and equally dramatic increases in the numbers of people and domestic animals inhabiting the Earth.
This increased the opportunity for viruses, bacteria and other pathogenic agents to pass from wild and domestic animals through the environment to cause diseases in people, the report said.
These diseases - called "zoonotic" or "zoonoses" diseases - include Ebola, bird flu, Middle East respiratory syndrome (MERS), sudden acute respiratory syndrome (SARS), Rift Valley fever, West Nile virus and Zika virus, it said.
In the last two decades these emerging diseases have had direct costs of more than $100 billion, the report said, and "if these outbreaks had become human pandemics, the losses would have amounted to several trillion dollars." Relationship between healthy environment and healthy people is critical
According to the report, "around 60 per cent of all infectious diseases in humans are zoonotic as are 75 per cent of all emerging infectious diseases." And "on average, one new infectious disease emerges in humans every four months," it said.
While many zoonotic diseases originate in wildlife, livestock often serve as a bridge, the report said, citing the case of bird flu which first circulated in wild birds, then infected domestic poultry which in turn passed the virus to humans.
As for toxic chemicals in crops, normally plants convert nitrate into amino acids and protein but drought slows the conversion causing nitrates to accumulate and become toxic to animals, the report said.
Worldwide, over 80 plant species are known to cause poisoning from accumulation of nitrates and wheat, barley, maize, millet, sorghum and soybeans are among the crops most susceptible, it said.
"Acute nitrate poisoning in animals can lead to miscarriage, asphyxiation and death," the report said, and it can ruin the livelihoods of small farmers and herders.
Another toxin associated with climate change is hydrogen cyanide or prussic acid that can accumulate in plants such as cassava, flax, maize and sorghum, it said.
Mycotoxins, which are chemical by-products of the growth of mushrooms and other fungi, "can cause severe damage to the health of animals and humans, even at small concentration," the report said. And "mycotoxin-producing fungi infect many crops such as coffee, groundnut, maize, oilseeds, peanut, sorghum, tree nuts and wheat."
Aflatoxins, which are fungal toxins that can cause cancer and stunt fetal growth, are another emerging problem in crops, the report said.
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Relationship between healthy environment and healthy people is critical

Relationship between healthy environment and healthy people is critical. The...

<div>

Barium leaches directly from fracked rocks. HANOVER, N.H. - Dartmouth College researchers are shedding light on the early chemical reactions in the organic sediments that would ultimately become the Marcellus Shale, a major source of natural gas and petroleum.

The <a href="http://www.sciencedirect.com/science/article/pii/S0016703716300965" target="_blank" rel="noopener noreferrer">findings</a> appear in the journal Geochimica et Cosmochimica Acta. The research extends an earlier <a href="http://www.sciencedirect.com/science/article/pii/S088329271530069X" target="_blank" rel="noopener noreferrer">study</a> by the Dartmouth team. Both PDFs are available on request.

Water injected into shale formations in hydraulic fracturing returns with extraordinarily high total-dissolved-solids and high concentrations of the toxic metal barium. The hazardous wastewater is assumed to be partly due to chemicals introduced into injected freshwater when it mixes with highly saline brine naturally present in the rock. But in their earlier study, the researchers found that chemical reactions between injected freshwater and the fractured shale itself caused barium to leach directly from the fractured rock. Barium leaches directly from fracked rocks

In the new study, the researchers addressed the basic question of when, why and how the Marcellus Shale became enriched in barium in the first place. They studied in detail the chemistry, mineralogy and sulfur isotope composition of a two-inch thick core. It was a special sample as it contains about 5,000 micrograms of barium per gram of rock. Such samples are concentrated only at a few depth intervals in the Marcellus Shale. The sample provided the researchers with insight into how, when and where a barium bearing mineral (barite) altered into iron sulfide (pyrite) during the transformation of organic rich marine sediment into shale in Devonian times.

The researchers discovered barite grains being "bitten" by pyrite as the latter replaced the former through a complex set of reactions that could occur only at a very specific depth interval where both sulfate (barite) and sulfide (pyrite) are present. This interval is called the sulfate-methane transition zone, which has been identified in relatively recent sediments but not in 400 million year old sediments.

"Our new study provides insights into the generalized nature of barium mobilization as barite is dissolved in organic rich sediments and its redistribution in clay minerals," says senior author <a href="http://earthsciences.dartmouth.edu/people/mukul-sharma" target="_blank" rel="noopener noreferrer">Mukul Sharma</a>, a professor of earth sciences.
###
Professor Mukul Sharma is available to comment at <a href="mailto:Mukul.Sharma@dartmouth.edu">Mukul.Sharma@dartmouth.edu</a>.

Broadcast studios: Dartmouth has TV and radio studios available for interviews. For more information, visit: <a href="http://communications.dartmouth.edu/media/broadcast-studios" target="_blank" rel="noopener noreferrer">http://communications. dartmouth. edu/ media/ broadcast-studios</a>.

</div>

Barium leaches directly from fracked rocks

Barium leaches directly from fracked rocks. HANOVER, N.H. - Dartmouth...

<div>

Can legumes solve environmental issues?. It's a win-win situation for the environment and the economy when it comes to introducing legumes into agricultural systems, says new research published in Frontiers in Plant Science, carried out by an <a href="https://www.bing.com/search?q=international&amp;cvid=b027780e95f844259d8bd6b5c0625e3a&amp;FORM=ANAB01&amp;PC=HCTS">international</a> team of scientists as part of the European Union project, Legume Futures.

Currently Europe's crop production is highly specialized in only a small number of plant species, to the detriment of the environment. Cereal crops dominate, meaning Europe imports over 70% of its protein feed stocks to support the meat industry. Can legumes solve environmental issues?

"The introduction of legumes such as clovers, lupins, lucerne and faba beans can increase the sustainability of agriculture and the supply of protein in Europe," stated Moritz Reckling of the Leibniz Centre for Agriculture Research (ZALF) in Germany and lead author of this study. Legumes are protein-rich and would provide relief for the deficit; they also increase the amount of nitrogen available to plants through biological nitrogen fixation, reducing the need for fertilisers.

With less than 2% of European arable land currently used to grow grain legumes, Reckling and co-workers created a model to determine the effects of integrating legumes into cropping systems. The team set out to evaluate the trade-offs between <a href="http://www.earth.com/news/environmental-era-of-pandemics/">environmental</a> and economic effects of legume integration.

To demonstrate applicability in different regions, they used five case study areas in Europe with contrasting climatic conditions and cropping systems. Reckling explained: "legumes are seen to be generally beneficial to the environment, but they are not economically attractive to farmers when compared as single crops, so we wanted to look at the gross margins of crop rotations when legumes are integrated".

The team confirmed the environmental benefits to introducing legumes and found that in such cropping systems, overall nitrous oxide emissions reduced by approximately 20-30% and fertilizer use was down by 25% to almost 40% in some cases. The systems developed did not show increased nitrate leaching into groundwater supplies, and in some systems with forage legumes leaching was even reduced.

Most significantly, the gross margins evaluated show an increase in all of the forage agriculture systems modelled, and in two out of the five arable systems. "When comparing the trade-offs between environmental and economic effects, the study shows that positive environmental effects do not necessarily mean that gross margins go down," concluded Reckling.

Contrary to popular belief, these findings show that the benefits of diversifying cropping systems through the inclusion of legumes can be both environmental and economic. Based on real case-study regions, the results demonstrate great potential for implementation.

The study also supports the recent reforms to the European Union's Common Agricultural Policy that promote the reintroduction of legumes into cropping systems. Through the effects of these incentives and increased awareness, the percentage of legumes grown on arable land is already beginning to rise. To provide further recommendations and support for farmers, research into the high variability of legume yields in the context of climate change adaptation is currently underway as part of the European project, Climate-CAFE.


</div>
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Can legumes solve environmental issues?

Can legumes solve environmental issues?. It's a win-win situation for...

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A history of snowfall on Greenland. The history of snowfall in Greenland is chronicled in an unlikely place: the remains of aquatic plants that died long ago, collecting at the bottom of lakes in horizontal layers that document the passing years.

Using this ancient record, scientists are attempting to reconstruct how Arctic precipitation fluctuated over the past several millennia, potentially influencing the size of the Greenland Ice Sheet as the Earth warmed and cooled.A history of snowfall on Greenland

An early study in this field finds that snowfall at one key location in western Greenland may have intensified from 6,000 to 4,000 years ago, a period when the planet's Northern Hemisphere was warmer than it is today.

While more research needs to be done to draw conclusions about ancient precipitation patterns across Greenland, the new results are consistent with the hypothesis that global warming could drive increasing <a href="https://www.bing.com/search?q=arctic+snowfall&amp;cvid=dd12b985fa8f4ee7bb16a04bc78f7e95&amp;FORM=ANAB01&amp;PC=HCTS">Arctic snowfall</a> -- a trend that would slow the shrinkage of the Greenland Ice Sheet and, ultimately, affect the pace at which sea levels rise.

"As the Arctic gets warmer, there is a vigorous scientific debate about how stable the Greenland Ice Sheet will be. How quickly will it lose mass?" says lead researcher Elizabeth Thomas, PhD, an assistant professor of geology in the University at Buffalo College of Arts and Sciences who completed much of the study as a postdoctoral fellow at the University of Massachusetts Amherst.

"Climate models and observations suggest that as temperatures rise, snowfall over Greenland could increase as sea ice melts and larger areas of the ocean are exposed for evaporation. This would slow the decline of the ice sheet, because snow would add to its mass," Thomas says. "Our findings are consistent with this hypothesis. We see evidence that the ratio of snow to rain was unusually high from 6,000 to 4,000 years ago, which is what you would expect to see if sea ice loss causes snowfall to increase in the region."

The research was published on May 23 in Geophysical Research Letters, a journal of the American Geophysical Union.

Aquatic plant leaf waxes as a record of snowfall

Thomas' research looks to understand how precipitation changed in the past, with an eye toward better predicting how modern warming will affect the Earth.

"We are using the past to see what might happen in the future," she says.

Aquatic leaf waxes are a relatively new tool for completing this work. They reveal information about the seasonality of precipitation -- how amounts of ancient summer rain compared to amounts of ancient winter snow.

To understand how aquatic leaf waxes function as a historical record, you need to know a little about aquatic plants. In the Arctic, these organisms survive on lake water, and use hydrogen atoms from this water to produce wax coatings on leaves.

These hydrogen atoms are the key to studying precipitation: In years when the ratio of summer rain to winter snow in a region is high, lake water and aquatic leaf waxes end up containing high levels of a rare form of hydrogen called deuterium, which is heavier than "normal" hydrogen. (This is because summer rain holds more deuterium than winter snowfall.)

In contrast, in years when snow is relatively abundant, aquatic plants start producing waxes with less deuterium.

This is what Thomas and her colleagues saw when they extracted a long, cylindrical sediment sample from a lake bottom in western Greenland. The mud contains ancient leaf waxes, with the oldest at the base of the column and the youngest at the top.

By dating and analyzing thin slices of the sample, the team determined that aquatic leaf waxes had low levels of deuterium from 6,000 to 4,000 years ago.

This is exactly what researchers would expect to see if the warm temperatures of that time had fueled sea ice loss, leading to increased Arctic snowfall and a decline in deuterium in lakes, Thomas said. She acknowledged that it's possible that a drop in summer rainfall accounted for the changes in deuterium, but says a rise in winter snowfall is the more likely explanation, as scientists have found independent evidence that the region was wetter 6,000 to 4,000 years ago.
###
The research team included UB Associate Professor of Geology Jason Briner; undergraduate student John J. Ryan-Henry from Brown University, the University of Rhode Island and the Roger Williams University School of Law; and Professor Yongsong Huang from Brown University and the Chinese Academy of Sciences. The study was funded by the National Science Foundation and research grants from the Geological Society of America.

</div>

A history of snowfall on Greenland

A history of snowfall on Greenland. The history of snowfall...

'Genetic toolkit' will help shed light on which species survive climate change

Scientists create world's largest coral gene database. Coral reefs - stunning, critical habitats for an enormous array of prized fish and other species - have survived five major extinction events over the last 250 million years.

Now, an international team of scientists led by Rutgers faculty has conducted the world's most comprehensive analysis of coral genes, focusing on how their <a href="https://www.bing.com/search?q=evolution&amp;cvid=80d3c79a0cf248edb249db76d90cc852&amp;FORM=ANAB01&amp;PC=HCTS">evolution</a> has allowed corals to interact with and adapt to the environment. A second study led by Rutgers researchers with colleagues at the University of Hawaii shows -- for the first time -- how stony corals create their hard skeletons, using proteins as key ingredients. Scientists create world's largest coral gene database

"There are a few key genes in corals that allow them to build this house that laid down the foundation for many, many thousands of years of corals," said Debashish Bhattacharya, a professor in the Department of Ecology, Evolution and Natural Resources in the School of Environmental and Biological Sciences at Rutgers. "It couldn't be any more fundamental to ocean ecosystems."

"I think one of the more interesting aspects of these data will be to understand which coral species may become winners or losers in the face of anthropogenic climate change - what makes them tougher and what makes them susceptible to changes in temperature, changes in ocean acidification," said Paul Falkowski, a professor who leads the Environmental <a href="http://www.earth.com/news/ion-channel-plant-communication/">Biophysics</a> and Molecular Ecology Laboratory at Rutgers.

The coral gene database study, led by Bhattacharya and Falkowski, was published today in the journal eLife. The study stems from an international coral genomics symposium and workshop held at Rutgers in February 2014 that was funded by the National Science Foundation. The stony coral study was published in the Proceedings of the Royal Society B: Biological Sciences last month.

Nearly all corals are colonial organisms that consist of as many as hundreds of thousands of animals called polyps. Types of corals include stony, shallow-water species that build reefs, soft corals and deep-water corals that live in dark cold waters, according to the National Oceanic and Atmospheric Administration.

Corals face four major threats from humans: Destruction of reefs by grenades and poison used to kill fish for food; nutrient pollution, usually from sewage or agricultural runoff, that overstimulates harmful algae; increased heat in the upper ocean, which causes most coral bleaching that can kill reefs; and acidification of the ocean, according to Falkowski.

"Corals are the most diverse marine ecosystems on the planet," he said. "But their value to marine ecosystems -- and to our own use of marine resources -- is very underappreciated."

Recent aerial and underwater surveys have found that 93 percent of the Great Barrier Reef off Queensland in Australia has endured very severe, moderate or at least some coral bleaching this year, according to the ARC Centre of Excellence for Coral Reef Studies in Australia. The reef, a world-renowned tourist attraction, is about 1,430 miles long.

Elevated sea temperatures from global warming can cause corals to expel tiny, colorful algae, according to the center. Corals turn translucent and white when they lose the algae. Mildly bleached corals can recover if the temperature drops and algae can recolonize them. If not, corals may die.

At Rutgers two years ago, leaders in the field of coral biology and genomics met to plan an analysis of 20 coral genomic datasets. The goal was to provide a comprehensive understanding of coral evolution since the organisms appeared on Earth 525 million years ago. The coral database, which includes corals in tropical waters, has been posted on the comparative.reefgenomics.org website to foster growth in this important area of research.

The eLife study's major advances include explaining the origin and evolution of the unique genes involved in the creation of hard skeletons by corals. The study also serves as a novel toolkit compared with the genes of humans, shellfish and other animals with hard skeletons.

Bhattacharya and coauthors found dozens of genes that allow corals to coordinate their response to changes in temperature, light and pH (acidity vs. alkalinity) and deal with stress triggered by the algae that live with them and exposure to high levels of light.

Surprisingly, some of these stress-related genes are of bacterial origin and were acquired to help corals survive. An intriguing theory that arose from the study is that the vast genetic repertoire of corals may help them adapt to changing ocean conditions.

The study in the Proceedings of the Royal Society B: Biological Sciences -- led by former Rutgers Department of Marine and Coastal Sciences post-doctoral fellow Tali Mass -- explains how stony corals make their hard, calcium carbonate skeletons. It also explains how this process might be affected as the oceans become more acidic due to climate change. Acidity increases as oceans are exposed to higher concentrations of carbon dioxide, the main greenhouse gas and cause of climate change, in the atmosphere.

"The aragonite (hard skeleton) is not just minerals," Bhattacharya said. "The proteins are very important for giving it shape and making it stable."

Falkowski said the study serves as a model for understanding how we can regenerate bone. "There are amazing parallels between the production of the skeleton of coral and production of bone," he said.

--

<a href="http://www.rutgers.edu" target="_blank" rel="noopener noreferrer">Rutgers University</a>

Scientists create world's largest coral gene database

'Genetic toolkit' will help shed light on which species survive...

Trump denies global warming but admits rising sea levels. Donald Trump wants to build another huge wall, this time to keep out the rising sea levels threatening to swamp his luxury golf resort in <a href="https://www.bing.com/search?q=ireland&amp;cvid=077081c2278f46eea66e66513bbdabfa&amp;FORM=ANAB01&amp;PC=HCTS">Ireland</a>.
The Republican presidential candidate has called climate change a "con job" and a "hoax." But in an application filed this month in County Clare, Ireland, the Trump International Golf Links and Hotel cites the threat of global warming in seeking a permit to build a nearly two-mile-long stone wall between it and the <a href="http://atlantic ocean">Atlantic Ocean</a>. The beach in front of the 18th green is disappearing at a rate of about a yard each year.
Trump's application, first reported Monday by Politico, cites local regulations pertaining to "rising sea levels and increased storm frequency and wave energy associated with global warming." An attached environmental impact statement says that almost all the dunes in western Ireland are retreating "due to sea level rise and increased Atlantic storminess."
Trump campaign spokesman Alan Garten did not respond Monday to messages from The Associated Press seeking comment.
Trump, who has roiled the immigration debate by proposing to build a massive wall along the Mexican border, has repeatedly taken to Twitter to express skepticism that human activity is causing the world to warm, raising sea levels as the polar ice caps melt. He has also said he would seek to "renegotiate" the global accord to cut climate-warming carbon emissions agreed to by President Barack Obama in December.
"The concept of global warming was created by and for the <a href="http://www.earth.com/image/aglaonema-chinese-evergreen/">Chinese</a> in order to make U.S. manufacturing non-competitive," Trump tweeted in 2012.
"The entire country is FREEZING - we desperately need a heavy dose of global warming, and fast! Ice caps size reaches all time high," Trump tweeted in 2014.
Environmental groups pounced on the application as evidence of hypocrisy.
"Donald Trump clearly cares more about the fate of his golf courses than the health of the millions of families already affected by the climate crisis," said Adam Beitman, a spokesman for the Sierra Club.
---
Associated Press writer Shawn Pogatchnik contributed from Dublin, Ireland.
---
Follow Michael Biesecker on Twitter at <a href="https://twitter.com/mbieseck" target="_blank" rel="noopener noreferrer">https://twitter.com/mbieseck</a>
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Trump denies global warming but admits rising sea levels

Trump denies global warming but admits rising sea levels. Donald...

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UK council approves fracking. A council has granted the first fracking license to be issued in England for five years, but environmental groups are vowing to fight on against the use of the <a href="https://www.bing.com/search?q=technology&amp;cvid=c10c329a5f114ba887ad63bff520d849&amp;FORM=ANAB01&amp;PC=HCTS">technology.</a>
Fracking was approved near the village of Kirby Misperton, 250 miles (400 kilometers) north of London, despite opposition to the controversial gas extraction technique.
Groups including Friends of the <a href="http://www.earth.com/video/earth-from-space-houston-texas/">Earth</a> said in a joint declaration Tuesday they will continue to fight to protect "our beautiful countryside" from fracking.
Activist Simon Bowens called the decision "an absolute travesty" and said the battle to prevent fracking is not over. Various appeals are being studied.
Licenses had been stalled because fracking had been judged the likely cause of minor earthquakes in England. Also UK council approves fracking because it helps fight for their country.
Earlier license applications had been rejected. The United Kingdom is a unitary parliamentary democracy and constitutional monarchy. The monarch is Queen <a title="Elizabeth II" href="https://en.wikipedia.org/wiki/Elizabeth_II">Elizabeth II</a>, who has reigned since 1952, making her the world's <a title="List of current state leaders by date of assumption of office" href="https://en.wikipedia.org/wiki/List_of_current_state_leaders_by_date_of_assumption_of_office">longest-serving current head of state</a>
© 2016 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.

UK council approves fracking

UK council approves fracking. A council has granted the first...

Glimmer of hope in battle against coral bleaching. A report commissioned by the United Nations and co-authored by the University of Sydney's UNESCO Chair in Marine Science offers a glimmer of hope to those managing the impact of bleaching on the world's <a href="https://www.bing.com/search?q=coral+reefs&amp;cvid=9760408b3ffe48c0be021d25bf586289&amp;FORM=ANAB01&amp;PC=HCTS">coral reefs</a>, including the Great Barrier Reef.

Coral bleaching has affected virtually the entire Great Barrier Reef and many other coral reef systems globally, a result of the continuing rise in global temperatures and exacerbated by the summer's major El Niño event.Glimmer of hope in battle against coral bleaching

The 35 authors of the United Nations Environmental Programme report - including the University's Professor Elaine Baker in the School of Geosciences - say as the world's surface reefs are being threatened, part of the ecosystem may survive in these barely known deeper environments, known as mesophotic coral ecosystems (MCEs).

Shallow coral reefs from the water's surface to 30-40 metres depth are the tip of the iceberg that comprises the ocean's extensive coral ecosystem. MCEs are intermediate depth reefs starting at about 40 metres depth and continuing to around 150 metres. The report being launched today - 'Mesophotic Coral Ecosystems A lifeboat for coral reefs?' - looks at the role MCEs could play in the preservation of shallower reefs.

The report asks if MCEs can provide a refuge for the species under threat in shallower reef ecosystems and whether they can provide the stock to re-populate shallow reefs if they continue to decline.

"Mesophotic coral ecosystems are a seed bank for some organisms," said Professor Baker.

"More research needs to be done to firmly establish the role of MCEs in preserving our reefs; they aren't a silver bullet but they may be able to resist the most immediate impacts of climate change -- thereby providing a refuge for some species and potentially helping to replenish destroyed surface reef and fish populations.

"It may be that the cooler, deeper water in MCEs could be more hospitable to many species than the warmer surface water," she said. "They also are less prone to waves and turbulence, therefore potentially offering a more stable environment."

The review brought together information on the geology, biology, distribution and socio-economic aspects of mesophotic reefs in order to examine their potential resilience.

The report found some deep mesophotic coral ecosystems may be less vulnerable to the most extreme ocean warming, but others may be just as vulnerable as their shallow counterparts and cannot be relied on to act as "life boats".

The report was set to be launched at the second session of the United Nations Environment Assembly UNEA-2 in Nairobi, coral reef media roundtable, on Tuesday 24 May from 15:30 to 16:15 Kenyan time / by 11.15pm Australian Eastern Standard time.

The full report and UN media release will be available via UNEP/UNEA-2 as well as from the University of Sydney.

--

<a href="http://www.usyd.edu.au/" target="_blank" rel="noopener noreferrer">University of Sydney</a>

Glimmer of hope in battle against coral bleaching

Glimmer of hope in battle against coral bleaching. A report...

People power crucial for low-carbon future. Policy makers must harness people power if society is to transition to a low-carbon energy future, argues a leading technology historian.

New research by Johan Schot, Director of <a href="https://www.bing.com/search?q=SPRU&amp;cvid=51e8f431c9c543cf826584f574dc5ff0&amp;FORM=ANAB01&amp;PC=HCTS">SPRU</a> (Science Policy Research Unit) at the University of Sussex, shows that viewing people as mere energy consumers means we risk losing a vast amount of potential in altering society and bringing about the substantive change we need to our existing energy system.

Published in the May edition of the journal Nature Energy, the research puts into sharp focus the crucial role different types of 'user-groups' play in helping shift society to a low-carbon system.People power crucial for low-carbon future

The paper -- 'The Roles of Users in Shaping Transitions to New Energy Systems' -- synthesises findings to outline five key types of users that interplay to create and change technology and society's application of it. Along with his co-authors, Assistant Professor Laur Kanger (University of Tartu) and Professor Geert Verbong (Eindhoven University of Technology), Schot urges Government and policy-shapers to understand this central dynamic and the opportunity it affords. Users are not just consumers -- they are creators, influencers and game-changers.

The five main sets that influence change are: User-Producer, User-Legitimator, User-Citizen, User-Intermediary and User-Consumer. Crucially, everyday actions and routines shared by these types, create collective beliefs and expectations that pave the way to shaping a new story for energy, taking what is often a novel niche in society through to its overarching energy regime. Taking the long view, the research shows that utilising user power is fundamental to long term change. The onus on Government should be to create incentives, initiatives and a system that is receptive.

Professor Schot said: "Consumers are often overlooked as important actors that are driving a transition towards a low carbon and highly energy-efficient future. In this process they develop new collective routines which shape further consumer choices on a routine basis. Taking this perspective means that government policies should not only focus on providing more information and raising awareness but also on mobilising the power of users for combating climate change and reducing energy use."

The User-Producers -- construct, tinker, amend, exploit, modify and improve technologies by engaging in extensive thinking and learning around the product, process or system. User-Producers are key to the innovation and start-ups.

The User-Legitimators -- These types are intrinsic in creating belief in the fresh technology, system, product or method. They positively inform and affect wider societal beliefs. They help provide knowledge to aid cultural acceptance.

The User-Citizens -- They are the activists, challengers and agents of social change against the current system. They mobilise and contest to carve out the existing structure fuelling the appetite and adoption of the new methods.

The User-Intermediaries -- create, influence and nurture the necessary networks by bringing together the critical producers, users, regulators and organisations. They create credibility which helps 'mainstream' the niche.

The User-Consumers -- these 'lead-consumers' adopt the niche developments early. They change to embed them in their daily routines. By attaching meaning, significance or status, User-Consumers contribute considerably to the positive construction of ideas about the niche within wider society. Therefore, they prompt mass take-up to take it from an innovative niche to fully-fledged regime.

--

<a href="http://www.sussex.ac.uk/" target="_blank" rel="noopener noreferrer">University of Sussex</a>

People power crucial for low-carbon future

People power crucial for low-carbon future. Policy makers must harness...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Nushagak Bay, a large estuary in southwest Alaska. Nushagak runs mainly north to south and exits in Bristol Bay, a large body of water in the Bering Sea.



"The bay is primarily fed by the Nushagak River, which begins in the Alaska Range and flows southwest approximately 450 km. The bay is also fed by several additional rivers including the Wood, Igushik, Snake and Weary rivers," says ESA.



"The dark colors of the Nushagak River are most likely due to tannins or lignins (chemical substances found in plants). Tannins and lignins from roots, leaves, seeds, bark and soil can leach into the water and give it a brown or even black colour. The sediments then flow southwards where it is mixed with the bluer waters of the bay."



Video/ Image 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

Nushagak Bay in southwest Alaska

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> (ACS) reveals that proteins on flu viruses are actually flexible, tilting and waving in a “breath-like” motion. According to the experts, these proteins could be used to better defend against the flu.



"The main antigenic targets of influenza virus are two surface glycoproteins, hemagglutinin (HA) and neuraminidase (NA). Whereas the structural and dynamical properties of both glycoproteins have been studied previously, the understanding of their plasticity in the whole-virion context is fragmented," wrote the researchers.



To investigate, the team conducted detailed simulations of the influenza A H1N1 virion, or the swine flu. The experts concluded that the visualizations show many new vulnerable states of flu viruses, which could improve future vaccines and antiviral drugs.



Video/ Image 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



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.

Flu viruses are more flexible than expected

[sendtonews key="G9bUoxcjr4-2511624-12187" type="single"] Today's Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Lake Trasimeno, which is located west of Perugia in central Italy. It is the fourth largest lake in the country. While Trasimeno’s water level varies, it has a maximum depth of approximately six meters.&nbsp;



"In this Copernicus Sentinel-2 image, captured on 6 August 2022, the lake’s emerald green colour is likely due to the presence of phytoplankton. Streaks in the water, particularly visible in the west, indicate the presence of soil and sediments which have been stirred up by winds. Dark colored waters in the southern part of the lake indicate a presence of submerged and floating macrophytes (aquatic plants) as well as algae," says ESA.



"Surrounded by hills on three sides, Trasimeno is subject to heavy storms created by winds, especially from the north and west. There are three islets in the lake: Maggiore, Minore and Polvese (the largest). The lake’s shores are sparsely inhabited with only two popular villages: Castiglione del Lago and Passignano sul Trasimeno."



"Italy is experiencing its worst drought in 70 years which has affected drinking water supplies, hydroelectric power and agricultural production. High temperatures, hot winds and lack of rainfall are the main causes of drought in the Umbrian region which saw Lake Trasimeno’s drop 1.3 m, reaching the limit of the hydrometric zero in July 2022."



Video/Image Credit: ESA&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

Lake Trasimeno in Central Italy

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Today's Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> describes a new self-powered nanosensor that can instantly detect mercury contamination with the tap of a finger.&nbsp;



The oxidized form of mercury can be harmful when it is ingested through contaminated water or food. This makes it necessary for experts to develop sensors that can quickly and accurately detect the presence of mercury.&nbsp;



Zong-Hong Lin and colleagues have now created a triboelectric nanosensor (TENS) that can detect mercury by simply by touching a sample. According to the researchers, their TENS could serve as the basis for similar devices to safely and remotely monitor other pollutants.



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



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.

Detecting mercury contamination with the tap of a finger

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Kainji Lake, a reservoir on the Niger River.



In 1968, Kainji Lake was created by the construction of the Kainji Dam. The Niger River, the third longest in Africa, enters the lake in the north.&nbsp;



According to <a href="https://www.earth.com/news/rivers-in-the-american-west-are-a-lifesaving-resource-for-birds/">ESA</a>, the creation of the lake submerged Foge Island and the town of Bussa and permanently flooded other riverine settlements, leaving around 50,000 people displaced.&nbsp;



Large parts of Foge Island are temporarily exposed during low water tides, and the land is often used by migrating fishermen. Kainji Dam is a dam across the Niger River in Niger State of Central Nigeria. 



Wild mammals occur at relatively low densities due to illegal hunting. Lake Kainji has suffered a dramatic decline as a fishery due to the high numbers of artisanal and subsistence fisherfolk using the lake. It has been suggested that a period of closure, together with controlled fishing rights may help improve fish stocks.



Kainji Lake National Park is the oldest of its kind in Nigeria. The park contains three distinct areas: a part of the Kainji Lake, the Borgu Game Reserve to the west of the lake, and the Zugurma Game Reserve to the southeast. The park is home to around 65 mammal species, 350 bird species, and 30 species of reptiles and amphibians. 



Video/ Image Credit: European Space Agency&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.

Kainji Lake in north central Nigeria

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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

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Today’s Video of the Day from the <a href="https://www.acs.org/">American Chemical Society</a> explores the ability of salt to transform the way that foods and beverages taste. Salt is known to cover up undesirable flavors, such as bitterness in coffee or beer, but how exactly does sodium chloride change the taste of other compounds?



One previous study showed that, not only does salt suppress bitterness, but also enhances sweetness and sourness. Another study revealed that bitterness reduction by salt seems to be happening at the tongue receptor level as well as in the brain.&nbsp;



While it is known that salt taste is mediated by the presence of sodium channels in the form of taste buds, experts believe that there is also an unknown receptor responsible for how we taste salt that has not yet been identified.&nbsp;



Video Credit: ACS Reactions



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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.

How does salt makes things taste better?

[sendtonews key="X0f6OHYoI4-2310561-12187" type="single"] Today’s Video of the Day from the...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Santiago, the capital city of Chile. The city is located in the center of the Santiago Metropolitan Region, which has a population of about eight million people.&nbsp;



'The weather of Santiago resembles the Mediterranean climate with dry and warm summers with temperatures reaching up to 35°C (from October to March) and cool and humid winters that can drop to 0°C (from April to September)."



"The city lies in the centre of the country’s central valley around 80 km from the Pacific Ocean to the west and borders Argentina to the east. A tiny part of Argentina is visible in the top-right corner of the image where the mountain crest of the Andes Mountains acts as a divider between the two countries," says ESA.



Video/ Image 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



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.

Santiago, Chile in South America

[sendtonews key="JRaP49ISmm-2357509-12187" type="single"] Today’s Video of the Day from the...

Spiral,Galaxy,,Illustration,Of,Milky,Way

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Astronomers at <a href="https://www.jhu.edu/">Johns Hopkins University</a> have created an interactive map of the universe, including the actual position and real colors of 200,000 galaxies. The map allows the public to access data that was previously only available to scientists.



The map was developed using data collected by the Sloan Digital Sky Survey. For over two decades, a telescope in New Mexico was aimed at slightly different locations to capture the night sky.&nbsp;



"Growing up I was very inspired by astronomy pictures, stars, nebulae and galaxies, and now it's our time to create a new type of picture to inspire people," said map creator Brice Ménard, a professor at Johns Hopkins. "Astrophysicists around the world have been analyzing this data for years, leading to thousands of scientific papers and discoveries. But nobody took the time to create a map that is beautiful, scientifically accurate, and accessible to people who are not scientists. Our goal here is to show everybody what the universe really looks like."



"In this map, we are just a speck at the very bottom, just one pixel. And when I say we, I mean our galaxy, the Milky Way which has billions of stars and planets. We are used to seeing astronomical pictures showing one galaxy here, one galaxy there or perhaps a group of galaxies. But what this map shows is a very, very different scale."



"From this speck at the bottom, we are able to map out galaxies across the entire universe, and that says something about the power of science."



The <a href="https://mapoftheuniverse.net/">interactive map</a> is available online, where it can be downloaded for free.



Video Credit: Johns Hopkins&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.

Interactive map of the universe includes 200,000 galaxies

[sendtonews key="e4ZG0Jawp3-2374785-12187" type="single"] Astronomers at Johns Hopkins University have created...

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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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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features Dublin, the capital and largest city of Ireland. Beyond its pub culture, Dublin is known as a modern culinary destination and a UNESCO City of Literature.



"Dublin is located near the midpoint of Ireland’s east coast in the province of Leinster. The city, which covers an area of around 115 square kilometers, is bordered by the Dublin Mountains, a low mountain range to the south, and is surrounded by flat farmland to the north and west," says ESA.



"The city straddles the River Liffey, which rises in the Wicklow Mountains and flows around 80 kilometers eastwards through the city of Dublin, in which it is canalised and bordered with quays. It then empties into Dublin Bay, an arm of the Irish Sea."



Dublin has an abundance of green spaces, including one of the largest enclosed public parks in any European capital city. Phoenix Park, which was originally formed as a royal hunting park in the 1660s, includes 707 hectares of green space.



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



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.

The city of Dublin on Ireland's east coast

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Today's Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the province of Zaragoza in northeast Spain. The image was captured by the Copernicus Sentinel-2 mission.



"Together with the provinces of Huesca and Teruel, Zaragoza formed the old kingdom of Aragon. Its capital, also called Zaragoza (not visible in this image) is home to around half of Aragon’s population," says ESA.



"The Ebro River can be seen winding its way through the province from west to east in this image. Between its source in the Cantabrian Mountains in the northwest and its delta on the Mediterranean coast, the Ebro River is fed by more than 200 tributaries as it flows 910 km across much of northern Spain."



Since rainfall is very scarce in this region, irrigation in the Ebro basin is critically important. In the valleys surrounding the Ebro River, many fields are used for growing crops such as corn, wheat, and barley.



Video/ Image 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



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.

The province of Zaragoza in northeast Spain

[sendtonews key="oL4FnPTGCV-2384527-12187" type="single"] Today's Video of the Day from the...

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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



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.

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



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.

The rapid retreat of the Columbia Glacier

[sendtonews key="0879czfG3k-1785905-12187" type="single"] Today’s Video of the Day from NASA...

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Today’s Video of the Day from the <a href="https://www.esa.int/">European Space Agency</a> features the Pyrenees Mountains, which form a natural boundary between France and Spain in southwest Europe.



The mountain range is 430 kilometers in length. It stretches from the Mediterranean Sea on the east to the Atlantic Ocean on the west.



At an elevation of 3404 meters, Pico de Aneto is the highest mountain peak in the Pyrenees, and the third-highest peak in Spain. Pico de Aneto is located in the Posets-Maladeta Natural Park, which spans more than 82,000 acres.&nbsp;



"Geological studies have revealed that the Pyrenees Mountains have been around for longer than the Alps, with their sediments first deposited in coastal basins during the Paleozoic and Mesozoic eras," reports ESA.



"The entire mountain range formed due to the upwelling of large sedimentary rocks by the collision of the Iberian and the Eurasian plate around 100 to 150 million years ago, followed by intense erosion from ice and water."



The western Pyrenees receive more precipitation due to moisture blowing in from the Atlantic Ocean. The mountain range contains many lakes, several small glaciers, and some of the highest waterfalls in Europe.



Video &amp; Image 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



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.

The Pyrenees Mountains in southwest Europe

[sendtonews key="6HyfrAJTBI-1831843-12187" type="single"] Today’s Video of the Day from the...

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Today’s Video of the Day from <a href="https://www.stowers.org/">Stowers Institute for Medical Research</a> describes why experts are studying zebrafish to gain a better understanding of how the immune system responds to injury. Zebrafish have the ability to repair and regenerate organs.



“Organ regeneration offers an exciting opportunity for studying the immune system and to inquire why some species can regenerate organs like the heart or missing limbs while others like humans cannot,” explained Dr. Tatjana Piotrowski.



Zebrafish sensory organ hair cells are an ideal system to investigate the pathways and cell types involved in regeneration since they are easily destroyed with antibiotics and begin regenerating within five hours. This enabled the researchers to identify the exact timing and genetic programs for each anti-inflammatory macrophage activation state.&nbsp;



“Our hypothesis is that human macrophages do not receive the proper chemical activation 'cocktail' to instruct pro-regenerative processes,” said Dr. Nicolas Denans. “Identifying the molecular recipe of macrophage activation in zebrafish may one day enable us to design regenerative immunotherapies in humans.”&nbsp;&nbsp;&nbsp;



“The new evidence is a valuable resource for comparative studies on the genetic programs involved in macrophage-mediated repair and regeneration. In other words, different types of injuries may induce different kinds of inflammatory responses. We want to decipher whether this 'language' is universal or if there are a variety of dialects."



Video Credit: Stowers Institute for Medical Research&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.

How the immune system responds to injury

[sendtonews key="0dEcERCq61-2283382-12187" type="single"] Today’s Video of the Day from Stowers...

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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

[sendtonews key="3UUsNkFOuS-2487333-12187" type="single"] Today's Video of the Day from NASA...

Earth,Like,Exoplanet,3d,Render

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Today's Video of the Day from <a href="https://www.nasa.gov/goddard">NASA Goddard</a> describes two exoplanets that are orbiting a star 218 light-years away. A team of researchers led by the University of Montreal has found evidence that these planets are "water worlds."



The experts used data from NASA’s Hubble and Spitzer Space Telescopes. They discovered that exoplanets Kepler-138 c and Kepler-138 could be composed largely of water.



"We previously thought that planets that were a bit larger than Earth were big balls of metal and rock, like scaled-up versions of Earth, and that's why we called them super-Earths," explained study co-author Björn Benneke.&nbsp;



"However, we have now shown that these two planets, Kepler-138 c and d, are quite different in nature and that a big fraction of their entire volume is likely composed of water. It is the best evidence yet for water worlds, a type of planet that was theorized by astronomers to exist for a long time."



Video Credit: NASA Goddard



Image Credit: NASA, ESA, and Leah Hustak (STScI)



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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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Two distant planets may be "water worlds"

[sendtonews key="QIoVYJqRBi-2434608-12187" type="single"] Today's Video of the Day from NASA...

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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...