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Results 521 - 540 of 647.


Environment - Earth Sciences - 18.03.2019
Researchers make a key discovery on how alpine streams work
Researchers make a key discovery on how alpine streams work
An EPFL study has showed that until now, scientists have been substantially underestimating how quickly gases are exchanged between mountain streams and the atmosphere. Based on research in the Swiss cantons of Vaud and Valais, an EPFL laboratory has shed new light on the role of mountain streams to emit greenhouse gases.

Environment - 18.03.2019
Mutually-assured destruction in heated coral-algae war
Mutually-assured destruction in heated coral-algae war
Global warming and acidifying oceans are creating an intense competition between coral and algae that both are set to lose. University of Queensland School of Biological Sciences ' Dr Kristen Brown said it was previously thought that human-induced stressors like climate change would result in an algal takeover, but experiments conducted on the southern Great Barrier Reef have suggested otherwise.

Environment - 14.03.2019
Sweet Baby Rays
Alumnus uncovers first-known manta ray nursery Gliding through the water with the slow hypnotic beat of their fins, the otherworldly manta rays are a perfect combination of size and grace. These plankton-eating marvels can reach up to 23 feet in wingspan as adults. Yet despite being so conspicuous, these gentle giants are notoriously hard to access and study, so major knowledge gaps remain in their basic biology, ecology and life history.

Earth Sciences - Environment - 14.03.2019
Tectonics in the tropics trigger Earth's ice ages
Tectonics in the tropics trigger Earth’s ice ages
Major tectonic collisions near the equator have caused three ice ages in the last 540 million years. Over the last 540 million years, the Earth has weathered three major ice ages - periods during which global temperatures plummeted, producing extensive ice sheets and glaciers that have stretched beyond the polar caps.

Environment - 14.03.2019
What ancient poop reveals about the rise and fall of civilizations
What ancient poop reveals about the rise and fall of civilizations
The pre-Columbian city of Cahokia was once among the most populous and bustling settlements north of Mexico. Nestled along the Mississippi River in what is now southern Illinois, its tens of thousands of inhabitants fished, farmed, traded and thrived. But by 1400 A.D., Cahokia's population had dwindled to virtually nothing.

Environment - Life Sciences - 14.03.2019
New cause for concern over weedkiller glyphosate
New research from McGill University reveals an overlooked impact that the widely used herbicide glyphosate may be having on the environment. First commercialized by Monsanto under the name Roundup, glyphosate has come under scrutiny in the past, mostly in relation to its potential toxicity. This new research, published recently in the Ecological Society of America's Frontiers in Ecology and the Environment, focuses not on direct health risks associated with the herbicide, but on its contribution to environmental phosphorus levels, an issue that has yet to receive much attention.

Environment - Earth Sciences - 14.03.2019
How marine snow cools the planet
How marine snow cools the planet
Researchers in the School of Geosciences have mapped out how carbonate formations have helped regulate Earth's temperature over 120 million years. Dr Adriana Dutkiewicz warns global warming could release some of that carbon into the atmosphere. University of Sydney scientists have modelled how carbonate accumulation from 'marine snow' in oceans has absorbed carbon dioxide over millennia and been a key driver in keeping the planet cool for millions of years.

Environment - 13.03.2019
Tunas, sharks and ships at sea
Tunas, sharks and ships at sea
Researchers combine maps of marine predator habitats with satellite tracks of fishing fleets to identify regions where they overlap - a step toward more effective wildlife management on the high seas. Maps that show where sharks and tunas roam in the eastern Pacific Ocean, and where fishing vessels travel in this vast expanse, could help ocean managers to identify regions of the high seas where vulnerable species may be at risk.

Environment - 13.03.2019
Only 149 trees of a wild apple species found alive
Niedzwetzky's apple, a relative of the ancestor of supermarket varieties, faces extinction as less than 150 trees have been found in its native land. Niedzwetzky's apple ( Malus niedzwetzkyana ) shares its home in Central Asia with the iconic snow leopard, but a new study shows the tree is far more endangered than the big cat, and faces extinction if immediate action is not taken.

Environment - 13.03.2019
Mapping the ravages of guns, traps and bulldozers on biodiversity
New research has revealed that human threats - like hunting and land clearing - are severely limiting the areas in which species can survive. A University of Queensland-led team mapped destructive human activities including hunting, agriculture, urbanisation and other industrial land uses in the locations of 5,457 threatened birds, mammals and amphibians.

Environment - 11.03.2019
When coyote parents get used to humans, their offspring become bolder, too
Across North America, coyotes are moving into urban environments, and regardless of how they feel about it, urban residents are having to get used to some new animal neighbors. A big question for wildlife researchers is how coyotes habituate to humans, which can potentially lead to conflict. A study led by a University of Washington Tacoma faculty member, recently published in Ecology and Evolution, suggests coyotes can habituate to humans quickly and that habituated parents pass this fearlessness on to their offspring.

Environment - Health - 11.03.2019
Black and Hispanic Americans bear a disproportionate burden from air pollution
Poor air quality is the largest environmental health risk in the United States. Fine particulate matter pollution is responsible for more than 100,000 deaths each year from heart attacks, strokes, lung cancer and other diseases. But not everyone is equally exposed to poor air quality, nor are all people equally responsible for generating it.

Life Sciences - Environment - 11.03.2019
Nature's Own Biorefinery
Nature’s Own Biorefinery
Insects are critical contributors to ecosystem functioning, and like most living organisms their co-evolution with microbes has been essential to support these functions. While many insects are infamous for wreaking havoc wherever they roam, many thousands of species go quietly about their business, providing important services essential to healthy ecosystems using the innovative biochemistry of their microbiomes.

Environment - Life Sciences - 08.03.2019
Global analysis of billions of Wikipedia searches reveals a treasure trove of biodiversity secrets
An international team of researchers from the University of Oxford , the University of Birmingham and Ben-Gurion University of the Negev have found that the way in which people use the internet is closely tied to patterns and rhythms in the natural world. This finding, published in the open-access journal PLOS Biology , suggests new ways to monitor changes in the world's biodiversity.

Environment - 07.03.2019
The deep Southern Ocean is key to more intense ice ages
The deep Southern Ocean is key to more intense ice ages
Over the last million years, ice ages have intensified and lengthened. According to a study led by the University of Bern, this previously unexplained climate transition coincides with a diminution of the mixing between deep and surface waters in the Southern Ocean. The study confirms that the Antarctic region plays a crucial role during periods of climate change.

Environment - Earth Sciences - 07.03.2019
Rescuing geologic and climate records
Rescuing geologic and climate records
Postdoc Daniel Ibarra recently traveled to the Philippines to collect cave deposits that are considered key to understanding changes in climate during ancient times. Scattered throughout the Philippines are many caves containing precious geological formations that hold key information about past climate.

Physics - Environment - 07.03.2019
First images of fuel debris fallout particles from Fukushima Daiichi
First images of fuel debris fallout particles from Fukushima Daiichi
A joint UK-Japan team has used innovative visualisation techniques to analyse forensic materials in order to understand the sequence of events of the Fukushima nuclear accident. In April 2017, the joint team comprising the University of Bristol, Diamond Light Source (Diamond) and the Japan Atomic Energy Agency (JAEA) undertook the first experiment of its kind to be performed at Diamond.

Life Sciences - Environment - 07.03.2019
Using Tiny Organisms to Unlock Big Environmental Mysteries
A new approach for studying microbial genes will provide insight into how ecosystems respond to changes in the environment and climate The DNA belonging to the community of microbes in a water sample can give scientists clues about the ecosystem as a whole. However, this photo was not taken in association with the study.

Environment - 06.03.2019
Sea ice acts as 'pacemaker' for abrupt climate change
Sea ice acts as ’pacemaker’ for abrupt climate change
Substantial variations in past sea ice cover in the Norwegian Sea were instrumental for several abrupt climate changes in large parts of the world, researchers have found. An international study involving researchers from the UK, Norway, Germany Australia, South Korea and the US has confirmed that changes in sea ice cover in the Norwegian Sea played a key role in driving abrupt climate change events between 32,000 and 40,000 years ago, where global temperatures shifted as much as 15 degrees Celsius.

Earth Sciences - Environment - 06.03.2019
Fossilised palm leaves give new insights into the geographical landscape of prehistoric central Tibet
Fossilised palm leaves give new insights into the geographical landscape of prehistoric central Tibet
A team of scientists from the UK and China have uncovered new evidence, using recently-discovered 25-million-year-old fossilised palm leaves, that Tibet's geography was not as 'high and dry' as previously thought. The new research, co-authored by academics from the University of Bristol's School of Geographical Sciences , suggests that central Tibet must have been no higher than 2.3km with large lakes fringed with subtropical vegetation and deep, hidden valleys.

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