Urban green spaces do much more than beautify cities. They shape air quality, cool heat-trapped streets, absorb floodwaters, and provide comfort to stressed populations. 



Recent work by researchers at the Karlsruhe Institute of Technology (KIT) demonstrates how diverse tree populations and green infrastructure directly affect urban resilience and human well-being.



Through the FutureBioCity and GrüneLunge (Green Lung) projects, KIT scientists show that cities need not only more green - but smarter, more diverse <a href="https://www.earth.com/news/city-trees-might-be-misleading-us-about-climate-change-impact/" target="_blank" rel="noreferrer noopener">green</a>. The researchers focused on modeling green infrastructure in Karlsruhe.



<h2 class="wp-block-heading" id="h-parks-with-many-tree-types">Parks with many tree types</h2>



The FutureBioCity project explored what makes public parks appealing. "We wanted to understand how people choose public parks, and what role the structure and composition of urban and peri-urban forests play in this choice,” said Dr. Somidh Saha, lead researcher at <a href="https://www.kit.edu/english/" target="_blank" rel="noreferrer noopener">KIT</a>.



His team blended ecological fieldwork with social surveys. Most people said they felt better in parks where they perceived a high diversity of tree species. 



“That shows that future parks should be designed to be as diverse and natural as possible so they appeal to people,” said Dr. Saha.



Although the data doesn't yet confirm whether diversity itself improves mental health, the strong preference for variety points to a clear design principle for future <a href="https://www.earth.com/news/urban-tree-layout-influences-human-health-and-mortality-rates/" target="_blank" rel="noreferrer noopener">urban planning</a>.



<h2 class="wp-block-heading" id="h-urban-trees-reduce-heat-and-floods">Urban trees reduce heat and floods</h2>



Green spaces do more than lift moods - they help cities manage climate risks. Concrete-heavy districts trap heat and repel rainwater, creating urban heat islands and flash floods. 



KIT’s GrüneLunge project modeled how trees and bioswales (vegetated trenches that absorb water) could reduce these effects. The team ran five-year simulations in 27 districts of Karlsruhe using the i-Tree HydroPlus model. 



The results showed that increasing <a href="https://www.earth.com/news/city-trees-absorb-much-more-carbon-than-expected/" target="_blank" rel="noreferrer noopener">tree</a> cover by 30% and routing runoff into bioswales led to dramatic improvements: a 64.5% drop in hours of extreme heat and a 58% reduction in water runoff. These effects were strongest in districts with the least existing green space.



<h2 class="wp-block-heading" id="h-soil-moisture-changes-tree-performance">Soil moisture changes tree performance </h2>



Cooling and drainage benefits vary by soil condition. Dry soils help urban trees absorb more water, reducing flood risk. 



Wet soils, however, enhance cooling via evapotranspiration - especially during heatwaves. This reveals a trade-off in how <a href="https://www.earth.com/news/planting-trees-in-the-wrong-place-can-make-cities-hotter/" target="_blank" rel="noreferrer noopener">green</a> infrastructure should be deployed: soil moisture drives different outcomes.



Another important finding: trees offer major nighttime cooling benefits. Tree canopies reduced surface heat buildup during the day, cutting nighttime temperatures by up to 5.5 °C (9.9 °F) between midnight and dawn.



<h2 class="wp-block-heading" id="h-prioritizing-vulnerable-communities">Prioritizing vulnerable communities </h2>



Some districts in Karlsruhe, like Palmbach, saw big gains from greening due to low starting tree cover. Others, like Innenstadt, still benefited - especially when bioswales were added.



The experts also recommend prioritizing older populations and vulnerable communities in climate planning. Linking tree planting with demographic data helps make cities safer and fairer.



But there's a caveat: tree survival depends on water. During drought, urban trees can't cool the air if they don’t have enough moisture. This makes irrigation planning crucial for long-term success.



<h2 class="wp-block-heading" id="h-nature-supports-healthy-aging">Nature supports healthy aging</h2>



While these urban studies focus on physical infrastructure, they tie into broader themes in aging science. A separate review on gut aging explains how weakened gut barriers and reduced microbial diversity drive systemic inflammation. This “inflammaging” leads to cognitive decline, frailty, and disease.



Green space access and microbiome health may connect in unexpected ways. Time in biodiverse environments may help expose people to microbes that regulate immune health. Moreover, interventions like fiber-rich diets, probiotics, and polyphenols can also support healthy gut aging.



The researchers suggest tailoring these approaches to age, sex, and gut type - just as tree-planting strategies should match local demographics and climate conditions.



<h2 class="wp-block-heading" id="h-urban-areas-need-diverse-trees">Urban areas need diverse trees </h2>



Together, these findings point to a central idea: healthy cities and healthy bodies both need diversity, resilience, and thoughtful design. 



Diverse green infrastructure can lower flood risk, reduce heat, and lift spirits. Microbial diversity in the body can slow aging and protect against disease.



If cities want to survive rising temperatures and aging populations, they must treat trees and microbes as allies - not extras. The sooner cities act, the stronger they will stand.



The results are published in&nbsp;<a href="https://www.nature.com/articles/s41598-025-89842-z" target="_blank" rel="noreferrer noopener">Scientific Reports</a>&nbsp;and&nbsp;<a href="https://www.sciencedirect.com/science/article/pii/S2210670725001714?via%3Dihub" target="_blank" rel="noreferrer noopener">Sustainable Cities and Society</a>.



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Diverse trees reduce heat and promote healthy aging in urban areas

Urban green spaces do much more than beautify cities. They shape air quality, cool heat-trapped streets, absorb floodwaters, and provide comfort to stressed populations. Recent work by researchers at the Karlsruhe Institute of Technology (KIT) demonstrates how diverse tree populations and green infrastructure directly affect urban resilience and human well-being. Through the FutureBioCity and GrüneLunge (Green Lung) projects, KIT scientists show that cities need not only more green - but smarter, more diverse green. The researchers focused on modeling green infrastructure in Karlsruhe. Parks with many tree...

Honolulu is known as the rainbow capital of the world, while <a href="https://www.earth.com/news/hawaii-south-africa-extinctions/">Hawaii</a> is often called the "Rainbow State." In a new report from <a href="https://manoa.hawaii.edu/">UH Mānoa</a>, Professor Steven Businger describes why Hawaii is the best place on Earth to experience rainbows. 

"Rainbows are some of the most spectacular optical phenomena in the natural world, and Hawaii is blessed with an amazing abundance of them," writes Professor Businger. 

"Rainbows in Hawaii are at once so common and yet so stunning that they appear in Hawaiian chants and legends, on license plates, and in the names of Hawaiian sports teams and local businesses." 

"Visitors and locals alike frequently leave their cars by the side of the road in order to photograph these brilliant bands of light."

"The cultural importance of rainbows is reflected in the Hawaiian language, which has many words and phrases to describe the variety of manifestations in Hawaii."

"There are words for Earth-clinging rainbows, standing rainbow shafts, barely visible rainbows, and moonbows, among others. In Hawaiian mythology the rainbow is a symbol of transformation and a pathway between Earth and Heaven, as it is in many cultures around the world."

Rainbows are optical illusions that appear when the sun shines onto water droplets. In order to get a glimpse of one on flat ground, the sun must be within about 40 degrees of the horizon. 

Professor Businger explains more about the science of rainbows, as well as the conditions that make Hawaii a hotspot for viewing them. He notes that the state's location in the subtropical Pacific means that the overall weather pattern is dominated by trade winds, with frequent rain showers and clear skies between the showers.

"At night a warm sea surface heats the atmosphere from below, while radiation to space cools cloud tops, resulting in deeper rain showers in the morning that produce rainbows in time for breakfast," said Professor Businger.

Hawaii's mountains also play an important role in forming the stunning light displays. These mountains cause trade wind flow to be pushed up, forming clouds and producing rainfall.

In addition, daytime heating drives island-scale circulations. During periods of lighter winds, showers form over the ridge crests on Oahu and Kauai in the afternoon, which lead to rainbows at sunset.

The fourth contributing factor to frequent rainbows in Hawaii is the clean air that is free of pollution, continental dust, and pollen.

As Professor Businger pursued his passion for photographing rainbows, he envisioned a smartphone app that would be equipped with access to Doppler radar and satellite data so that it could alert users when the conditions are right for rainbow sightings nearby.

"Just as you can chase tornados in the U.S. Midwest, you can chase rainbows in Hawaii," said Professor Businger.

"After a few years of false starts, Paul Cynn and I finally connected with Ikayso, a Hawaiian smartphone app developer in April of 2020. I am very excited to say that our app, called RainbowChase, is now available to the public for free."

The study is published in the journal <a href="https://journals.ametsoc.org/view/journals/bams/bams-overview.xml">Bulletin of the American Meteorological Society</a>.

---

<hr />

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

&nbsp;

Why Hawaii has the best rainbows on the planet

Honolulu is known as the rainbow capital of the world,...

Smog,,Fog,And,Air,Pollution,Over,A,City,During,A

Reductions in air pollution could actually boost global warming without a substantial cut in carbon dioxide emissions. Computer modeling experiments from <a href="https://www.kyushu-u.ac.jp/en/">Kyushu University</a> have revealed that surface air temperature will increase without the cooling effect of sulfate aerosols, unless <a href="https://www.earth.com/news/subsea-permafrost-could-unleash-catastrophic-co2-emissions/">CO2</a> levels are simultaneously reduced. 

Worldwide, nations are scrambling to limit CO2 emissions in an effort to mitigate global warming. The new study suggests that without major cuts to greenhouse gas emissions, reductions in air pollution will make it difficult to defeat rising temperatures.

"Air pollution causes an estimated seven million premature deaths per year worldwide, so action is essential, especially in emerging and developing countries, which tend to be most affected," said study co-author Professor Toshihiko Takemura.

"However, reductions in air pollutants must come hand in hand with reductions in greenhouse gases to avoid accelerating global warming."

The study shows that the long-term effects of reductions in pollutants known as sulfate aerosols will cause further increases in surface air temperature at current and increased carbon dioxide levels. This is due to an overall cooling effect that is produced by the light-scattering particles.

To investigate how these aerosols--small particles of sulfur-containing compounds influence the climate, Professor Takemura used a combination of models known as MIROC-SPRINTARS.

While MIROC accounts for many key aspects of the atmosphere, SPRINTARS predicts the mixing of aerosols in the atmosphere. By combining the two models, climate projections can include effects from the scattering and absorption of light by aerosols, as well as the interaction of aerosols with clouds.

The immediate changes to the atmosphere with reduced sulfate aerosols were found to be the same regardless of CO2 levels. However, when looking at changes in the climate and surface temperatures over longer time scales, Professor Takemura found that not only does the surface air temperature increase with a reduction in sulfate aerosols - but this increase is even larger with rising levels of carbon dioxide.

"Although the fast response is similar for both situations, long-term changes caused by more slowly responding factors related to interactions with the oceans and subsequent changes, such as in clouds and precipitation, eventually leads to a bigger temperature increase," explained Professor Takemura.

"Thus, global warming will accelerate unless increases in greenhouse gas concentrations are suppressed as air pollution control measures decrease sulfate aerosol concentrations, further emphasizing the urgency for reducing carbon dioxide in the atmosphere."

The study is published in the journal <a href="https://www.nature.com/srep/">Scientific Reports</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Reducing air pollution could give global warming a boost

Reductions in air pollution could actually boost global warming without...

A new study from the <a href="https://www.sheffield.ac.uk/">University of Sheffield</a> has revealed that legume trees are key to the restoration of tropical forests. The experts have found that trees in the legume family release vital minerals from the <a href="https://www.earth.com/news/fruit-eating-mammals-fertilize-the-soil-in-tropical-forests/">soil</a> and share them with neighboring trees. 

"Our research shows that legume trees not only provide valuable nitrogen through their symbioses with bacteria that live in their roots, but interact with free-living soil bacteria allowing nutrients to be chemically released," explained study lead author Dr. Dimitat Epihov.

"We discovered the abundance of a novel group of acid-loving bacteria, key in liberating minerals locked in iron minerals beneath legume trees, and that those benefits are passed on to nearby trees."

The findings are shedding new light on the role legume trees play in safeguarding the function of tropical forests. The research may also help to inform land managers and policy makers on how best to approach reforestation on degraded land.

The researchers discovered that legume trees overcome the challenge of growing on nutrient-poor soils by accelerating weathering processes. The trees acidify the soil and adjust its carbon to nitrogen ratio, ultimately providing easier access to nutrients.

The microbial changes in the soil favor a type of bacteria that breaks down iron, which releases iron-bound minerals critical to tree growth.

Legume trees are also particularly important in the process of forest recovery because they are able to supply fresh nitrogen into soils. This nitrogen gets broken down by bacteria and utilized by trees locally. 

Study co-author Professor David Beerling is the director of the University of Sheffield's Leverhulme Centre for Climate Change Mitigation.

"By using advanced genomic sequencing techniques we have addressed a long standing puzzle of how fast growing trees access sufficient nutrients to support their growth from nutrient-poor soils," said Professor Beerling.

"The answer, it turns out, is to exploit specialised consortia of soil microbes whose metabolism allows them to efficiently break down rocks and extract nutrients they contain."

The study is published in the journal <a href="https://www.pnas.org/">Proceedings of the National Academy of Sciences</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Legume trees play a key role in forest recovery

A new study from the University of Sheffield has revealed...

Wild,Peach,Fruits,In,Early,Summer

In a new study led by the <a href="https://btiscience.org/">Boyce Thompson Institute</a>, scientists have identified genes that could help domesticated peaches become more resistant to the pressures associated with climate change. 

"Our study provides many candidate genes, showing how the peach has adapted to all kinds of environmental stresses and stimuli," said study co-lead author Professor Zhangjun Fei. 

"Breeders can use this information to develop more resilient domesticated peach trees that cope better with temperature extremes, drought and other harsh, changing conditions imposed by climate change."

The researchers analyzed DNA sequences in wild peaches that have adapted over a long time to specific local conditions across seven different regions in China. The experts identified genes that provide tolerance to extreme conditions, such as drought and ultraviolet radiation.

There is an urgent need to make food crops more resistant to climate change, which is causing many plants to become less productive. 

While many studies have identified genes that enable rice and other food crops to adapt to climate stress, few studies have been focused on major fruit crops. The domesticated peach, Prunus persica, has a global yield of 24.5 million tons per year.

According to the researchers, many of domesticated peach's adaptation genes have been lost as humans bred the plant to focus on traits such as flavor. Wild varieties contain the genetic diversity that is needed to make domesticated peaches more resilient. 

The study was focused on 263 types of wild peaches and landraces, including 218 from the National Peach Germplasm Repository of China and 45 from the Tibetan Plateau. Overall, the team identified more than 2,700 areas of the genome that are linked to 51 local climate factors.

For example, peaches from a region with extremely low winter temperatures had a genetic variant that provides resistance to cold. Wild peaches from a very arid region were found to have multiple genetic variants that regulate their response to drought.

"When a fruiting plant like peach is growing under a stressful condition like drought, its fruit gets sweeter," said Professor Fei. "In this study, we have found the direct genetic link between drought and the sugar content of peach."

Among peach trees from the Tibetan Plateau, the team identified a variant that protects the fruit from the intense UV-B radiation that is found in high altitudes.

"Overall, the genetic information we found could help people breed peach trees that grow in many different and harsh environments, expanding peach's geographic range to new regions," said Professor Fei. 

"Breeders could develop cultivars that thrive on otherwise unused land, bolstering the local economy and bringing more good food to local markets."

The study is published in the journal <a href="https://genome.cshlp.org/">Genome Research</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Wild peaches are genetically equipped to handle climate stress

In a new study led by the Boyce Thompson Institute,...

The economic benefits of protecting nature are greater than the benefits of exploiting it, according to new research from the <a href="https://www.cam.ac.uk/">University of Cambridge</a>. The study is the largest of its kind to compare the value of conserving natural sites to potential economic gains from converting them for human use.

"Current rates of habitat conversion are driving a species extinction crisis unlike anything in human history," said study senior author Professor Andrew Balmford.

"Even if you are only interested in dollars and cents, we can see that conserving and restoring nature is now very often the best bet for human prosperity. The findings echo at an operational scale the overall conclusions drawn by the Dasgupta Review."

The team examined dozens of sites across six continents. The results of the analysis have been published just weeks after a landmark report by Cambridge Professor Partha Dasgupta called for the value of biodiversity to be placed at the heart of global economics.

The experts calculated the monetary worth of each site's "ecosystem services," including carbon storage and flood protection. They also measured the value of each site by estimating the potential profits from converting it for production of goods such as crops and timber.

"Stemming biodiversity loss is a vital goal in itself, but nature also fundamentally underpins human well-being," said study lead author Dr. Richard Bradbury. "We need nature-related financial disclosure, and incentives for nature-focused land management, whether through taxes and regulation or subsidies for ecosystem services."

The study revealed that one major economic benefit of natural habitats is driven by their ability to help lower greenhouse gas emissions through processes like carbon sequestration.

Each ton of carbon carries a cost of at least $31 to global society. Based on this rate, which many scientists consider to be too conservative, more than 70 percent of the sites examined for the study have greater monetary value as natural habitats.

Even if the societal cost of carbon is removed completely from their calculations, the researchers found that almost half of the 24 sites were still worth more in their natural state.

"People mainly exploit nature to derive financial benefits. Yet in almost half of the cases we studied, human-induced exploitation subtracted rather than increased economic value," said study co-author Dr. Kelvin Peh of the University of Southampton.

Ten years ago, the scientists designed the Toolkit for Ecosystem Service Site-based Assessment (TESSA), which enables users to measure and assign a monetary value to services provided by a natural site. The new study is focused on results from 62 applications of TESSA around the world, which were mostly either forest or wetland. 

In one case, the scientists discovered that if Nepal's Shivapuri-Nagarjun National Park lost its protection and was converted from forest to farmland, it would cut carbon storage by 60 percent and reduce water quality by 88 percent. Combined with other costs, the conversion of this national park would produce a deficit of $11 million per year.

According to study co-author Anne-Sophie Pellier from BirdLife International, the results support the idea that conserving and restoring key biodiversity areas is not only important for safeguarding our natural heritage, but also for providing wider economic benefits to society.

The study is published in the journal <a href="https://www.nature.com/natsustain/">Nature Sustainability</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Protecting nature is much more valuable than converting it

The economic benefits of protecting nature are greater than the...

Summer could drag out for nearly six months in the Northern Hemisphere by the end of this century, according to a new study published by the <a href="https://www.agu.org/">American Geophysical Union</a>. The experts report that without efforts to mitigate <a href="https://www.earth.com/news/humans-can-overcome-climate-change-by-being-flexible/">climate</a> change, a persistent summer season could have far-reaching impacts on agriculture, human health, and the environment.

Beginning in the 1950s, the four seasons arrived in a predictable and fairly even pattern across the Northern Hemisphere. But now, climate change is causing the seasons to become more irregular. 

The research shows that the unpredictable lengths and start dates of the seasons will become even more extreme in the coming decades under a business-as-usual emissions scenario.

Study lead author Yuping Guan is a physical oceanographer at the State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, and the Chinese Academy of Sciences.

"Summers are getting longer and hotter while winters shorter and warmer due to global warming," said Guan. He was inspired to investigate changes to the seasonal cycle while working with undergraduate student and study co-author Jiamin Wang. 

To measure changes in the length and onset of four seasons in the Northern Hemisphere, the researchers analyzed historical daily climate data from 1952 to 2011.

The team defined the start of summer as the onset of temperatures in the hottest 25 percent during that time period, while winter began with temperatures in the coldest 25 percent. Next, the experts used climate change models to predict how seasons will shift in the future.

The analysis revealed that during the study period, summer grew from 78 to 95 days, while winter shrank from 76 to 73 days. Spring decreased from 124 to 115 days, and autumn dropped from 87 to 82 days. Overall, spring and summer arrived earlier, while autumn and winter started later. 

The greatest changes in seasonal changes took place in the Mediterranean region and across the Tibetan Plateau. The researchers predict that without climate change mitigation efforts, winter will last less than two months, and the transitional spring and autumn seasons will continue to shrink throughout the remainder of this century.  

"Numerous studies have already shown that the changing seasons cause significant environmental and health risks," said Guan. For example, birds are shifting their migration patterns and plants are flowering at different times, creating potential mismatches between animals and their food sources. Seasonal changes can also be very damaging to crops and budding plants when false springs or late snowstorms occur. 

Furthermore, prolonged warm weather extends pollen and allergy season, as well as the length of time that disease-carrying mosquitoes persist and move northward.

Congwen Zhu is a monsoon researcher at the State Key Laboratory of Severe Weather and Institute of Climate System, who was not involved in the study. He noted that a shift in the seasons could result in more severe weather events

"A hotter and longer summer will suffer more frequent and intensified high-temperature events - heatwaves and wildfires," said Zhu. Additionally, he explained, warmer and shorter winters may cause instability that leads to cold surges and winter storms, much like the recent snowstorms in Texas and Israel.

"This is a good overarching starting point for understanding the implications of seasonal change," said Scott Sheridan, a climate scientist at Kent State University. "I think realizing that these changes will force potentially dramatic shifts in seasons probably has a much greater impact on how you perceive what climate change is doing."

The study is published in the journal <a href="https://agupubs.onlinelibrary.wiley.com/journal/19448007">Geophysical Research Letters</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Summers may last for nearly six months by the end of this century

Summer could drag out for nearly six months in the...

Sea level rise will impact populated areas along the coast up to four times faster as a result of land subsidence, according to a new study from the <a href="https://www.uea.ac.uk/">University of East Anglia</a>. The investigation is the first of of its kind to analyze global sea-level rise while accounting for measurements of sinking <a href="https://www.earth.com/news/more-than-one-third-of-the-corn-belt-impacted-by-farmland-erosion/">land</a>.

Prior to this study, the impact of subsidence combined with sea-level rise was thought of as a local issue. But the researchers have found the problem worldwide. 

The experts report that over the past two decades, coastal communities have experienced average sea level rise at a rate of 7.8 - 9.9 millimeters per year. Meanwhile, the global average rise was 2.6 millimeters per year.

The researchers said that the impacts for coastal communities are far larger than what has been estimated by the Intergovernmental Panel on Climate Change (IPCC).

Study lead author Professor Robert Nicholls is the director of the UK's Tyndall Centre for Climate Change Research and Chair of Climate Adaptation at the University of East Anglia.

"Climate induced sea-level rise is caused by melting glaciers and thermal expansion of water due to rising global temperatures," said Professor Nicholls.

"Rapid rates of subsidence in deltas and especially cities on deltas are also human-caused, mostly due to groundwater pumping, also oil and gas extraction, and sediment resupply prevented by upstream dams, flood defences, sand extraction or mining."

"About 58 percent of the world's coastal population lives on deltas where land is subsiding. Less than 1 per cent of global coastal population lives where land is uplifting.

"We wanted to look at the big picture globally, to better understand the impact of global sea-level rise combined with measurements of sinking land."

"We found that coastal populations live with sea-level rise at three and four times the global average and that the impacts of sea-level rise being experienced today are much larger than the global numbers being reported by the Intergovernmental Panel on Climate Change (IPCC)."

According to Professor Nicholls, addressing human-induced subsidence is important in the short term, as it is an essential coastal adaptation to protect people and economies.

The researchers found that the issue is most urgent in coastal communities located in southeastern Asia. This region has many subsiding deltas and coastal flood plains, growing coastal megacities, and more than 70 percent of the world's coastal population.

The team also determined that land subsidence has been stopped or greatly reduced in Tokyo, Shanghai, and Bangkok as a result of reduced groundwater extraction.

"One of the main reasons that Jakarta, the capital city of Indonesia, is being moved to Borneo is because the city is sinking due to groundwater extraction from shallow wells," said Professor Robert Nicholls.

"We hope that our analysis improves the understanding of how sea-level rise and subsidence are hand-in hand for science and coastal management policy worldwide. Jakarta might be just the beginning."

The study is published in the journal <a href="https://www.nature.com/nclimate/">Nature Climate Change</a>.

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

The sea is rising up to four times faster in coastal communities

Sea level rise will impact populated areas along the coast...

In North America alone, invasive <a href="https://www.earth.com/news/recent-genetic-connectivity-found-among-chimpanzee-subspecies/">species</a> cause billions of dollars in annual damages. A new study from the <a href="https://www.ualberta.ca/index.html">University of Alberta</a> suggests that limiting the presence of non-native wildlife through functional eradication may be a more effective strategy than total annihilation.

"Rather than trying to completely eliminate invasive species that have spread over large areas, which is very challenging, functional eradication aims to limit their abundances below levels that damage the ecosystem in priority locations," said study lead author Professor Stephanie Green.

"Resources that might otherwise be wasted on attempting complete eradication can be spread to other areas, protecting more places from impacts."

The experts propose using a strategy called functional eradication to limit the impact of destructive and widespread invasive species. For their investigation, the researchers surveyed 232 natural resource managers and invasive species specialists in Canada and the United States.

"More than 90 percent of these folks said the most destructive invaders in their regions were spread beyond a scale at which they could eradicate them, and instead local teams were engaged in a long-term battle to suppress or contain the species," explained Green.

At the same time, only two percent of the study participants said they had identified targets that signified when they had done enough to manage a species.

"This points to a major gap between the needs of the people who must make decisions about invasive species, and the information scientists and monitoring programs are collecting," said study co-author Edwin Grosholz.

According to Green, managing widespread invasive species is a long-term endeavour, but not one without hope. "Involving local communities in the functional eradication process is essential for maintaining the capacity needed to continually suppress these invaders."

The researchers pointed to an example of functional eradication among invasive lionfish. These beautiful Indo-Pacific fish, which are popular in aquariums, have spread throughout the Caribbean Sea and the Atlantic Ocean, where they prey on many native species. 

Financial incentives for catching lionfish are now helping to reduce their population below levels that affect native species in the area. The fish are being caught for food and for use in local art. 

The experts report that similar strategies can be applied to the European green crab, an invasive species found along the Pacific and Atlantic coasts in Canada and the United States, as well as Prussian carp.

"Our study shows that ecologically damaging and widespread invasive species are prime candidates for functional eradication," said Green. "To effectively keep populations down in priority areas, targets need to be based on how many of the invasive species it takes to cause major changes in the ecosystem."

The study is published in the journal <a href="https://www.esa.org/frontiers-in-ecology-and-the-environment/">Frontiers in Ecology and the Environment</a>. 

---

By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Functional eradication may be the best approach to invasive species

In North America alone, invasive species cause billions of dollars...

Even though chimpanzees are typically divided into four geographical subspecies, some studies have found evidence of genetic connectivity among all populations. 

In a new study from the <a href="https://www.eva.mpg.de/">Max Planck Institute for Evolutionary Anthropology</a>, experts have discovered recent genetic connectivity between chimpanzee subspecies, despite periods of isolation.

"Given the high degree of behavioral variability and flexibility across chimpanzee populations, characterizing range-wide patterns of genetic diversity in chimpanzees is important for understanding how they adapt to changing environmental conditions," explained the researchers.

In collaboration with the Pan African Programme: The Cultured Chimpanzee (PanAf), an international team of experts collected over 5,000 fecal samples from 55 sites across the chimpanzee range in 18 countries. This is by far the most complete sampling of chimpanzees to date.

"Collecting these samples was often a daunting task for our amazing field teams. The chimpanzees were almost all unhabituated to human presence, so it took a lot of patience, skill and luck to find chimpanzee dung at each of the sites," said study senior author Mimi Arandjelovic.

"We used rapidly-evolving genetic markers that reflect the recent population history of species and, in combination with the dense sampling from across their range, we show that chimpanzee subspecies have been connected, or, more likely, reconnected, for extended periods during the most recent maximal expansion of African forests," said study first author Jack Lester.

This means that although chimpanzees were separated into different subspecies in their distant past - prior to human disturbances - the geographic barriers were permeable to chimpanzee dispersal. 

"It is widely thought that chimpanzees persisted in forest refugia during glacial periods, which has likely been responsible for isolating groups of populations which we now recognize as subspecies," explained study co-author Paolo Gratton. 

"Our results from fast-evolving microsatellite DNA markers however indicate that genetic connectivity in the most recent millennia mainly mirrors geographic distance and local factors, masking the older subspecies subdivisions."

According to PanAf co-director Hjalmar Kuehl, the results suggest that the great behavioral diversity observed in chimpanzees is not due to local genetic adaptation but to their reliance on behavioral flexibility to respond to changes in their environment.

At sites that were associated with human disturbances and pressures, the researchers noted signals of reductions in diversity. There were even some locations where no chimpanzees were detected, even though they had been present in recent decades. 

"Although not unforeseen, we were disheartened to already find the influence of human impacts at some field sites where genetic diversity was markedly lower than what we expected," said Lester.

The findings highlight the importance of genetic connectivity for chimpanzees in their recent history. While chimpanzees are adaptable and can survive in human-modified landscapes, they are currently facing multiple threats including habitat loss and diseases. The results of this study indicate that if habitat fragmentation and isolation continue, there will be serious consequences for the genetic health and viability of chimpanzees.

Christophe Boesch, co-director of the PanAf and director of the Wild Chimpanzee Foundation, concluded that every effort should be made to re-establish and maintain dispersal corridors across their range, with perhaps special attention to trans-national protected areas.

The study is published in the journal <a href="https://www.nature.com/commsbio/">Communications Biology</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Recent genetic connectivity found among chimpanzee subspecies

Even though chimpanzees are typically divided into four geographical subspecies,...

Cactus pears could become a source of sustainable food and fuel in places that need these resources the most, according to the <a href="https://www.unr.edu/">University of Nevada, Reno</a>. 

The fact that the plants are also heat and drought resistant, and not to mention capture carbon from the atmosphere, means that cactus pears could serve as an important crop in the face of climate change.

Climate projections show that long-term droughts will increase in duration and severity, which will lead to higher temperatures and less water availability. Crops such as rice, corn, and soybeans have an upper temperature limit, while other traditional crops like alfalfa require more water.

"Dry areas are going to get dryer because of climate change," said Professor John Cushman. "Ultimately, we're going to see more and more of these drought issues affecting crops such as corn and soybeans in the future."

In a previous study funded by the Experiment Station and the U.S. Department of Agriculture's National Institute of Food and Agriculture, Professor Cushman's team conducted the first long-term field trial of Opuntia species. They found that plants including the spineless cactus pear could be used as raw material for biofuels to replace fossil fuels.

The study showed that cactus pears had the highest fruit production while using up to 80 percent less water than some traditional crops.

"Maize and sugar cane are the major bioenergy crops right now, but use three to six times more water than cactus pear," said Professor Cushman. "This study showed that cactus pear productivity is on par with these important bioenergy crops, but use a fraction of the water and have a higher heat tolerance, which makes them a much more climate-resilient crop."

The cactus pear is a versatile perennial crop that works well as a bioenergy crop. The plant also serves as a land-based carbon sink that captures and stores CO2 from the atmosphere. 

"Approximately 42% of land area around the world is classified as semi-arid or arid," said Professor Cushman. "There is enormous potential for planting cactus trees for carbon sequestration. We can start growing cactus pear crops in abandoned areas that are marginal and may not be suitable for other crops, thereby expanding the area being used for bioenergy production."

The study is published in the journal <a href="https://onlinelibrary.wiley.com/journal/17571707">GCB-Bioenergy</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Cactus pears show great potential for sustainable food and fuel

Cactus pears could become a source of sustainable food and...

In a new study from <a href="https://vt.edu/">Virginia Tech</a>, experts have identified a clear connection between stream quality and human health. Streams represent a critical interface between human beings and the environment. They serve as a major source of drinking <a href="https://www.earth.com/news/humans-have-a-major-influence-on-the-global-water-cycle/">water</a>, as well as a place where we often go to enjoy nature.

To explore the relationship between the quality of streams and human well-being, experts in the College of Natural Resources and Environment and the Department of Biological Systems Engineering analyzed data on local demographics, indicators of human well-being, and indicators of stream health.

The study revealed that health statistics such as cancer rates and food insecurity are strongly correlated with water quality across the Commonwealth of Virginia. The team also identified a link between stream quality and demographics such as race and population density.

Paul Angermeier is a professor in the Department of Fish and Wildlife Conservation and assistant unit leader of the Virginia Cooperative Fish and Wildlife Research Unit for the U.S. Geological Survey.

"We started off wanting to explore the general, intuitive relationship between human well-being and ecosystem health," explained Angermeier. "Many of us intuit that healthy ecosystems produce benefits that accrue to people, but that outcome isn't well documented in a quantitative way."

Environmental quality management processes often separate the natural world from human experiences, and the researchers needed a new approach.

"When we consider natural resources, we tend to think about whether we're managing an environment for nonhuman considerations or human ones," said Professor Leigh-Anne Krometis. "For instance, at the state level we have a department of environmental quality and a department of health, which both deal with the subject of water quality, but in different ways. What we wanted to see was how those two perspectives converge."

The study authors used water quality measurements provided by the Virginia Department of Environmental Quality and county-level demographics data from the U.S. Census Bureau. 

"We had large data sets that we had to organize and process," explained Professor Marc Stern. "Our expectations on finding meaningful relationships between stream health and human factors weren't that high. The fact that they showed up so distinctly was a surprise."

The researchers discovered that there is a strong correlation between ecosystem health and human demographics. For example, more polluted streams were associated with higher degrees of overall mortality.

"We still don't have hard data on how people are interacting with nature," said Angermeier. "For instance, we found that mortality rates for people are correlated with contamination levels in fish. What does that mean? Are people eating contaminated fish, are they merely sharing a polluted water source, or is it something else?" 

"A better understanding of the mechanisms by which people are interacting with water will help us draw clearer conclusions about health outcomes."

The study is published in the journal <a href="https://www.sciencedirect.com/journal/ecological-indicators">Ecological Indicators</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Stream quality is strongly correlated with human health

In a new study from Virginia Tech, experts have identified...

In recent decades, nuisance flooding has increased across the U.S. <a href="https://www.earth.com/news/hundreds-of-coastal-airports-are-threatened-by-sea-level-rise/">coastline</a> as a result of sea level rise. A new study from the <a href="https://www.ucf.edu/">University of Central Florida</a> reveals that coastal development is also promoting more frequent nuisance flooding events.

The researchers found a link between a greater number of nuisance flooding days and higher local tide ranges that are most likely tied to human development.

Nuisance flooding is considered to be minor flooding along the coast that causes problems such as flooded roads and overloaded stormwater systems. The issues associated with nuisance flooding not only cause major inconveniences for people, but also promote bacteria and mosquitoes.

Changes to local tide range are typically found in coastal areas and estuaries where channels are dredged, land is reclaimed, or development occurs. These types of human disturbances cause the local tide range - the height difference between high tide and low tide - to increase in some areas and decrease in others.

The study was focused on data from 40 NOAA tidal gauge locations spread across the continental U.S. coastline. Among these sites, nearly half had more nuisance flooding days because of higher local tide ranges.

"It's the first time that the effects of tidal changes on nuisance flooding were quantified, and the approach is very robust as it is based purely on observational data and covers the entire coastline of the U.S. mainland," said study co-author Professor Thomas Wahl.

The investigation showed that nuisance flooding increased because of tidal changes in about half the locations, decreased in a fourth of the locations, and did not change in the remaining quarter of locations.

For example, Cedar Key, Florida received about 23 additional nuisance flooding days because of increased tidal range in 2019. During the same time frame, Washington, D.C. had about 52 fewer days of flooding due to decreased tidal range.

"Seeing how many nuisance flooding events occurred in the past and are happening today simply because of tidal changes should be motivation for us to keep alterations to sensitive estuarine systems at a minimum as to not further exacerbate the problem, which we already face because of sea level rise," said Professor Wahl. 

"We should at least be aware of these potentially negative impacts in the planning phase of alteration projects, and it might even be possible to reverse some of the negative impacts from past decisions."

"While a few individual instances of these minor flooding events do not cause too many impacts, the cumulative impacts of frequent events can become very large," Wahl says. "Hence, understanding what drives the changes in nuisance flooding is very important."

The study is published in the journal <a href="https://advances.sciencemag.org/">Science Advances</a>.

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By <a href="http://csexton@earth.com">Chrissy Sexton</a>, <a href="https://www.earth.com/staff/">Earth.com</a> Staff Writer

Coastal development is worsening nuisance flooding

In recent decades, nuisance flooding has increased across the U.S....

Scientists are transforming chocolate into a functional food by infusing it with probiotics and prebiotics, aiming to create a treat that satisfies cravings while supporting gut health. 



The challenge lies in maintaining chocolate's beloved texture and flavor while adding health benefits.



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Probiotics - beneficial microbes that balance gut bacteria and aid digestion - are typically fragile and can be destroyed by stomach acid or processing. 



Prebiotics act as food for these microbes, helping them thrive. Together, they form "synbiotics," a powerful health combination.



Researchers Smriti Gaur and Shubhi Singh from India's Jaypee Institute of Information Technology took an innovative approach, using natural prebiotics like corn and honey instead of complex processing methods. 



They created five chocolate varieties: a control and four synbiotic versions containing different combinations of prebiotics, probiotics (Lactobacillus strains), and flavor enhancers (cinnamon or orange).



Laboratory simulations of human digestion showed the probiotics remained viable for over five hours, suggesting they could survive long enough to benefit gut health.



Taste tests were positive, with researchers particularly enjoying the orange-flavored variety, describing it as having "vibrant citrus notes" complementing the "rich cocoa" with a "luxurious" texture.



This research represents just the beginning. With further refinement of strains, textures, and flavors, chocolate could evolve beyond mere indulgence to become a functional food that nourishes while it delights.



The study is published in the journal <a href="https://pubs.acs.org/doi/10.1021/acsfoodscitech.4c00741" target="_blank" rel="noreferrer noopener">ACS Food Science &amp; Technology</a>.

Is chocolate the next nutritional powerhouse?

Scientists are transforming chocolate into a functional food by infusing...

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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



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Designing crops that can beat the heat

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

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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

Remote sensing will revolutionize the way we monitor trees

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

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



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



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



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



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



Video Credit: ESA&nbsp;&nbsp;



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



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.

Lesotho: Africa's "Kingdom in the Sky"

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



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



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



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



Video Credit: NASA Goddard



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



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Wetlands are a major source of methane emissions

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



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



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



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



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



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



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



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



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



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



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The rapid retreat of the Columbia Glacier

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



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



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



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



Video/ Image Credit: NASA Goddard



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



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2022 illustrated the consequences of a warming climate

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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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Satellites reveal how Earth's systems are interconnected

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

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



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



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



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



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



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



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



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Tiger sharks are shifting poleward as temperatures rise

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

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



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



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



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



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



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



Video Credit: ESA&nbsp;



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



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Melt ponds on the Greenland Ice Sheet

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



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



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



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



Video Credit: ESA



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



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.

Tracking changes in Earth's water cycle

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



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



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



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



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



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



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



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



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



Video Credit: NASA Goddard&nbsp;



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



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.

Mysterious "spoke season" captured on Saturn

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

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



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



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



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



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



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



Video Credit: NTU Singapore



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



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.

Plants help remove heavy metals from contaminated soil

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



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



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



Video Credit: American Chemical Society&nbsp;



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



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.

Weeds are becoming increasingly resistant to herbicides

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



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



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



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



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



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



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



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.

NASA monitors giant dust storms on Mars

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



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



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



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



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



Video Credit: ESA&nbsp;



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



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.

Qeshm Island in the Strait of Hormuz

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



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



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



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



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



Video/ Image Credit: ESA



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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.

Inhambane Bay in southeast Mozambique

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



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



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



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



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



Video Credit: ESA



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



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.

Kangerlussuaq Glacier on the Greenland ice sheet

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



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



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



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



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



Video Credit: ESA



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



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.

Ocean heat influences regional climate

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



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



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



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



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



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



Image/ Video Credit: ESA



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

Monitoring the dynamic shape of the sea surface

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