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Amphibians, Reptiles, & Natural History
Amphibians, Reptiles, & Natural History
Diseases historically absent from the United States have been showing up in Florida, Texas, California and other U.S. states in recent years. To understand why, look to Peru. That’s where researchers from Stanford and other institutions analyzed the connection between a cyclone and a massive outbreak of dengue fever, a mosquito-borne viral disease that can cause fever, rash, and life-threatening symptoms like hemorrhage and shock.
A new study reveals an unprecedented increase in wildfires in tropical peatlands during the 20th century. “Unprecedented burning in tropical peatlands during the 20th century compared to the previous two millennia” is published in Global Change Biology.
A new study published in The Lancet Global Health reveals a previously underappreciated tension at the heart of international climate negotiations: policies designed to protect developing countries from bearing an unfair share of the cost of cutting carbon emissions could inadvertently deprive those same countries of millions of life-saving air quality improvements. The leaders of the study also identify a promising way to resolve this dilemma.
In the fight against the climate crisis, countries are pinning great hope in reforestation projects. In a new study, ETH Zurich researchers show that the location in which reforestation is taking place is usually more important than the number of trees planted. If forests are strategically positioned, the same cooling effect could be achieved using half the area of land.
Biodegradable plastics could help alleviate the plastic waste crisis that is polluting the environment and harming our health. But how long plastics take to degrade and how environmental bacteria work together to break them down is still largely unknown.
A global analysis of more than 2,300 seawater samples from more than 20 field studies around the globe indicates that human-made chemicals make up a significant portion of organic matter in coastal oceans. The international study, led by biochemists Jarmo Kalinski and Daniel Petras at the University of California, Riverside, analyzed seawater samples collected over a decade from coastal regions from the Pacific, Atlantic, and Indian oceans.
An international research team used multiple global agroeconomic models and found that climate mitigation consistent with the 1.5 °C target could raise global hunger risk in 2050 by 17% (56 million people) compared with a baseline scenario that assumes today’s climate and air pollution conditions persist. However, the concurrent reduction in ozone offsets approximately 15% (8.4 million people) of this increase, with Sub-Saharan Africa and India accounting for 56% of the offset.
The future of one of Antarctica’s most iconic glaciers could be far more dramatic than scientists previously thought. Using satellite calibrated ice sheet models, a team of researchers from the University of Edinburgh found that the Thwaites Glacier in West Antarctica could be shedding 180–200 gigatonnes of ice per year by 2067—a rate roughly comparable to the entire Antarctic ice sheet’s current mass loss. That would represent a stunning acceleration in ice loss from a single glacier and underlines urgent concerns about future contributions to sea level rise.
The 2025 Eaton fire’s smoke did more than darken the sky: It generated a carbon monoxide and particulate matter surge that far exceeded Los Angeles County’s average daily human-caused emissions, according to a new study led by researchers at the USC Dornsife College of Letters, Arts and Sciences. The findings are published in the journal ACS ES&T Air.
Wet wipes conveniently clean and sanitize soiled surfaces and skin. Because some labels do not clearly indicate how consumers should dispose of them, these small cloths are often flushed down the toilet and released by sewage plants into waterways. Now, researchers report in ACS ES&T Water that some of these wipes break down into plastic fibers, or microplastics, that could harm aquatic life.
Governments’ attempts to achieve climate goals are falling short, in large part because wealthy economies are continuing to pursue economic growth. As these economies ramp up production and consumption, they make climate mitigation more difficult to achieve. As a result, the Paris Agreement is slipping out of reach, putting nature and human societies in jeopardy.
Ice cores taken from glaciers reveal the air pollution of the past, using atmospheric particles incorporated in snow that fell on the glacier and became ice. Now, scientists have extracted a record of thousands of years’ worth of air pollution from 9.5 meters of ice at the Weißseespitze glacier, close to the border between Austria and Italy. But this ice is under threat from global warming, and scientists warn that it is now a race against time to capture critical climate information locked in these glaciers before it’s gone forever.
From coral reefs and kelp forests to the open ocean and deep-sea zones, nutrients that support phytoplankton growth and marine productivity form the foundation of oceanic ecosystems. When levels of key nutrients—such as nitrate and phosphate—get too high or too low, these ecosystems may face major disruption. However, at a global scale, long-term trends in marine nitrate and phosphate levels have been unclear.
Climate change is lengthening our days because rising sea levels slow Earth’s rotation. Researchers from the University of Vienna and ETH Zurich now show that the current increase in day length—1.33 milliseconds per century—is unprecedented in the past 3.6 million years. The team reconstructed ancient day-length fluctuations using the fossil remains of single-celled marine organisms known as benthic foraminifera.
Thanks to upstream diversions and climate change, Utah’s Great Salt Lake has shrunk by 70% since 1989, exposing about 800 square miles of playa and mudflats—along with numerous curiosities. While a potential environmental catastrophe, the lake’s dewatering presents numerous research opportunities for University of Utah geoscientists, including several who are looking to characterize the extent, characteristics, chemistry and flow of a mysterious, mostly freshwater aquifer under the playa.
The Amazon rainforest is famous for storing massive amounts of carbon in its trees and soils, helping regulate the global climate. Yet a paper published in New Phytologist shows that one of South America’s largest carbon-storing ecosystems exists in an often-overlooked grassy savanna: the Cerrado in Brazil.
Artificial intelligence is rapidly transforming weather prediction, enabling forecasts that once required hours of supercomputing time to run in just minutes. But as AI tools play an expanding role in high-stakes hazard modeling, researchers at Rice University say an essential question remains: Do AI-generated storms behave realistically?
A new study estimates that the Israel–Gaza war has generated around 33 million metric tons of carbon dioxide equivalent (CO2e), highlighting the often-overlooked environmental impact of armed conflict.
Two new studies conclude that stabilizing long-term climate risks will require sustained net-negative carbon dioxide (CO₂) emissions for centuries. Approaching the problem from distinct perspectives—legal and technological feasibility on the one hand, and economic optimization under uncertainty on the other—the research converges on a consistent message: reaching net zero is not enough.
From the rice paddies of South Asia to the wheat fields of northern China, summer monsoon rains sustain the livelihoods of billions. Yet these vital rains fluctuate dramatically from decade to decade—a variability that has long puzzled climate scientists.
Forests were growing on the now-submerged landmass of Doggerland thousands of years earlier than previously believed, according to a major new sedimentary ancient DNA (sedaDNA) study led by the University of Warwick. The findings suggest that Doggerland may have provided a surprisingly hospitable refuge for plants, animals, and potentially humans, thousands of years before forests became widespread across Britain and northern Europe.
The tidal environment of mangrove forests serves as nurseries for many fish species. Researchers at the University of Gothenburg have measured carbon dioxide and oxygen levels in 23 of the world’s mangrove areas. The study, published in the journal Geophysical Research Letters, sends out a warning that these ecosystems are increasingly threatened as sea temperatures continue to rise.
A research team led by Professor Jonghun Kam from POSTECH (Pohang University of Science and Technology) has revealed that typhoons are a critical factor in mitigating global droughts by simulating a scenario where typhoon-induced precipitation is removed. The study, published in Geophysical Research Letters, delivers the message that “imagining a world without typhoons is the starting point for understanding future droughts.”
By 2050, up to half the world’s urban population will face water scarcity. A new model of water supply, demand, and policies in a drought-prone city of 7 million in India shows how policies could prevent the poor from bearing the heaviest burden.
An article published recently in Nature Geoscience warns that Antarctica’s ice masses have begun to experience a process scientists call “Greenlandification.” The term refers to the unprecedented retreat of Greenland’s outlet glaciers and longer surface melt seasons.
As the United States continues to lead global oil and gas production—accounting for roughly 20% of worldwide output in 2024—understanding how different extraction methods affect ecosystems has never been more urgent. A new study in ACS ES&T Water offers new clarity: conventional, often decades-old oil-and-gas infrastructure leaves a deeper, more persistent mark on freshwater biodiversity than unconventional shale (fracking) development.
Brazilian researchers have developed an index that can measure the health of mangrove soils at different stages. When applied to degraded, restored, and preserved areas, the index revealed that healthy mangroves, including recovered ones, provide ecosystem services at nearly maximum capacity. In contrast, deforested mangroves have only a small fraction of this potential.