Tag: "climatic" at biology news

Researchers redrawing the Tree of Life

... vegetation dynamics and species extinction due to climatic changes. The new tree would also help in the study of patterns of gene transfers among plant genomes. ...

Deciphering the Arctic Ocean climate puzzle

...ists can move away from pure speculation about the climatic evolution of the Arctic over the past ~55 million ... core contains an exciting story about the earth's climatic and environmental development. More information concerning the Arctic Coring Expedition (ACEX) and ...

New method to measure ancient land elevation developed by Field Museum scientist

...ow how the process of mountain building influenced climatic patterns as well as plant and animal evolution." The new method of paleoelevation involves counting the stomata on leaves of plants going back as far as 65 million years ago. Stomata are minute openings on the surface of leaves through which plan...

A complex agricultural society in Uruguay's La Plata basin, 4,800-4,200 years ago

... the mid-Holocene was characterized by significant climatic and ecological changes associated with important cultural transformations. During this period, around 4,500 years ago, the climate was much drier than it is today and "Wetlands became biotic magnets for human habitation providing an abundant, reliab...

NSF funds Panikov's Alaskan Tundra Microbial Observatory project

... found to be an important trigger in recent global climatic changes: warming caused degradation of permafrost and stimulated microbial decomposition, converting the tundra from a 'sink' to a net source of CO2-to-atmosphere. The understanding, prediction and mitigation of the observed climate and atmospheric c...

Latest census finds more American pika populations disappear as climate warms

...r them and perhaps an impossibility under current climatic conditions. Results from Dr. Beever's study published last year suggest that climate change may be interacting with other factors such as proximity to primary roads and smaller habitat area to increase extinction risk for pikas, creating detrimental ...

Why does species diversity vary so much?

...agues examine three hypotheses about the origin of climatic gradients of diversity. The "Species-energy" hyp... rates of evolutionary diversification may magnify climatic gradients of richness....

The Cochrane Library Newsletter, 2005, Issue 1

...ly research, is cheap, widely available, stable in climatic extremes and easily administered," says Dr Darren Roberts of Anuradhapura General Hospital, Sri Lanka. Review title: Roberts et al: Alkalinisation for organophosphorus pesticide poisoning. The Cochrane Database of Systematic Reviews 200...

Six research units given the go-ahead

...of Bayreuth, Jena and Gttingen, will study extreme climatic situations in a field experiment. Two locations in the Fichtelgebirge mountain chain in south-east Germany, between Bayreuth and the Czech border, give the soil scientists, hydrologists, microbiologists and plant ecologists a unique research environm...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...as projected, mismatches may occur between the new climatic conditions and plants that have adapted to current conditions over centuries. "Maintenance of wetlands in their current state, and thus the goods and services they provide and the species they support, is crucially linked to averting serious changes...

Earth's services in peril, report concludes

...ched in many ecosystems, resulting in catastrophic climatic or biological changes over a very short time with little warning. Poverty and degradation of nature may turn into a downward spiral, in which poor communities have fewer options to conserve natural resources, the abuse of land increases and even gre...

For sardine and anchovy, El Nio events do not always have the same effects

...stence of these areas, with specifically different climatic conditions, appear to have favoured the survival o...ese populations in spite of generally unfavourable climatic conditions. Near the coasts of Peru and Chile, the Humboldt Current ecosystem is the world's most p...

NJIT math professor helps navy detect subs; Explains global warming

...mplications for other fields. One is the study of climatic trends and the continuing international dialogue o...cal composition as well. Therefore, in addition to climatic information, acoustic analysis can signal changes in the composition of water in a particular area, ...

'Live fast, die young' true for forests too

...se likely to respond most quickly to suchthings as climatic change," said Nate Stephenson, a USGS research eco... carbon dioxide, a heat-trapping gas implicated in climatic warming, increases as carbon storage in forests decreases, and decreases as carbon storage in forest...

Fungus-farming termites descend from an African rain forest Eve

...rate, and humid, highly buffered, rain forest like climatic conditions in their nests, termites have been able to export this rain forest process into the savannas. The marrying of termites and fungi in a mutualistic symbiosis has thus allowed both partners to conquer the savannah: agricultural termites and t...

News tips: NASA presentations at Annual 2005 Joint Assembly Meeting

...is of model and other data, researchers argue that climatic changes were too great and too frequent to permit the development of a successful agriculture until 11,000 years ago. Time/Location: Tuesday, May 24 at 2:30 p.m. EDT (1:30 p.m. local CDT), Hall B Presenters: Joan Feynman and Alexander Ruzmaikin, NASA...

York scientists warn of dramatic impact of climate change on Africa

...elieve the effect may be on a similar scale to the climatic disruption in the last Ice Age and the African forest decline 2,500 years ago. Scientists in the University's Environment Department studied the likely impact of future climate fluctuations on the continent by modelling the responses of more than 500...

Fossil Patagonian plants show high insect feeding diversity 52 million years ago

... These fossil leaves grew during the Eocene global climatic optimum, the warmest time period in the last 70 million years. During this time, there were no polar ice caps and alligators were found above the Arctic circle. The researchers classified damage by feeding group and damage type. The four feeding ...

Millennium Ecosystem Assessment: Many of 2 billion dryland dwellers at risk as land degrades

...ation land degradation in drylands as a result of climatic factors and human activities among the world's greatest environmental challenges, destabilizing societies by deepening poverty and creating environmental refugees who can often add stress to areas that may not be degraded. Desertification has other ...

Aquatic plants may hold key to advancing plant disease management

...ant diseases continue to provide insight as to how climatic change influences disease development. "Emerging marine diseases, such as coral diseases, are creating a major shift in the marine flora," Schmale said. "Global warming and climate change appear to be increasing the rate at which these diseases sprea...

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