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Tag: "droughts" at biology news

Study suggests evolutionary link between diet, brain size in orangutans

...n parts of Borneo suffer more from El Niño-related droughts than parts of western Borneo," the scientists wrote. "The effects of El Niño on tropical rain forest composition and diversity are also more marked in eastern compared to western parts." So Taylor and van Schaik undertook "a comprehensive re-evalua...

Tropical Atlantic cooling and African deforestation correlate to drought, report scientists

...limate being held this week, an article on African droughts and monsoons, by a University of California, Santa...restrial and ocean system," he says. He notes that droughts in this region are currently occurring more frequently than in the past few thousand years, although...

Underlying cause of massive pinyon pine die-off revealed

... 1950s, not as many trees died. To see how the two droughts differed, the researchers compared the four driest consecutive years of the earlier drought, 1953-1956, with those of the recent drought, 2000-2003. "By every measure we looked at, the recent drought was hotter," Breshears said, adding that, if anyt...

Tropical Deforestation affects rainfall in the U.S. and around the globe

...nal serious changes for the rest of the world like droughts and severe storms. Clearly, land-cover changes in tropical regions carry potentially significant consequences on water resources, wildfire frequency, agriculture and related activities at various remote locations. And while greenhouse gas emissions ...

NASA satellite data provides rapid analysis of Amazon deforestation

...nal serious changes for the rest of the world like droughts and severe storms. Global climate is also affected when Amazon burning practices to clear fields for farming result in large fires that create air pollution and release tiny particles, known as aerosols. Aerosols can both heat and cool the air, depe...

Past droughts geographically widespread in the West, according to tree-ring data

.... The project's overall conclusion is that severe droughts and low-flow conditions in one basin are unlikely ...903, the Salt/Verde river basin had at least eight droughts as severe as the 1950s drought. Ester said the findings will help devise an assessment tool for i...

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

...bat Desertification. "Drylands experience frequent droughts without harm. However dryland ecosystems are fragi..., the Horn of Africa, and Southeast Africa--severe droughts occur on average once every 30 years. These droughts triple the number of people exposed to severe w...

No relief for Pacific Northwest drought

... if drought resumes. The models that simulate the droughts and the likelihood of fire are complex and sometimes counter-intuitive, the researchers said, involving such things as vegetation growth, fuel loads, soil moisture, climatic trends and other factors. "Last year was a pretty severe drought over quite...

World's largest rainforest drying experiment completes first phase

...carbon removed from the atmosphere during tropical droughts will decrease significantly. In addition, there are implications for sustainable forest management, because the time one must wait after harvesting timber from a forest before a second harvest will increase. Third, the observed sensitivity of large ...

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