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Tag: "impacts" at biology news

Scientists collaborate to assess health of global environment

...ed to wetlands, the role of the private sector and impacts on human health are scheduled for July. According to Mooney, these topics were chosen because the organizations that oversee major international treaties dealing with biological systems requested the information. The lack of adequate data to uphold s...

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

...abá River, however, could have profound ecological impacts in the northern Pantanal. "Inter-linkages approac...her words, the environmental, economic, and social impacts of activities of stakeholders in the Pantanal should be considered in managing the wetlands. It say...

Bone Density Recovers After Teens Stop Injected Contraceptive

...es evidence that DMPA use by adolescents adversely impacts [bone mineral density] at key anatomical sites,?the study authors wrote. “However, these results in teens and those from our previous cohort provide reassurance that bone loss is regained, even in younger users.?/p> The current study is among sev...

Small species back-up giant marsupial climate change extinction claim

...effects of possible future climate changes and its impacts on modern species." Megafauna roamed the globe in the Pleistocene epoch, between 1.8 million and 10,000 years ago. In the northern hemisphere species such as the woolly mammoth and sabretooth tiger dominated the landscape, while in Australia - whic...

Physiological effects of reduced gravity on bacteria

...abitat. Responses to reduced gravity, coupled with impacts of other features (such as radiation resistance and the ability to persist under very low nutrient conditions), may contribute to the success of these water system bacteria. ...

Africa to take it on chin again with climate change

...onal effects in Africa, and these have substantial impacts on people. Now we can explain these climatic effects," says Hurrell. Recurrent drought since the 1970s has plagued southern Africa, including Angola, Zambia, and Zimbabwe. Meanwhile, the nearby Indian Ocean has warmed more than 1 degree Celsius (0.6...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...artificially induced algal blooms could have major impacts on recreational and commercial fishing, major industries in the gulf. Red tides, for example, can cause outbreaks of life-threatening diseases, such as paralytic shellfish poisoning, which can shut down mussel and clam harvesting for long periods of ...

Changing ecosystems throw scientists mega-challenges

...ontinued human population growth and the uncertain impacts of of environmental change, the report states, ens...is a critical resource whose availability strongly impacts human health and economic development, answering questions in that domain will advance scientific un...

Retrovirus struck ancestors of chimpanzees and gorillas millions of years ago, but did not affect ancestral humans

...earchers believe that the virus may have had major impacts on the formation of the species we now call chimps and gorillas. The virus struck when each of the primate groups was still an incipient species with widely varying populations. If the virus had killed off much of the population of both species, it ...

Radio-tracking associated with 'dramatic shift' in water vole sex ratio

...nt as part of an evolutionary mechanism mitigating impacts of suboptimal habitats, similar to the sex-ratio bias and stress response in food deprived water voles," they say. Researchers have long been aware that the techniques they use had the potential to cause unexpected effects, and there have been many ...

Census of Marine Life explorers surprised by diversity, density of Arctic creatures

...species will have growing importance for measuring impacts of climate change and, should polar caps continue receding, hypothetical new disturbances on the northern ocean such as energy exploitation, fishing and shipping. The research compares species distribution in the shelf, slope and deep sea regions (t...

Scientists discover global pattern of big fish diversity in open oceans

...study is the first to step back to examine climate impacts and fishing in unison at a global scale. It shows that environmental changes affect fish populations year-to-year, but overfishing is the primary driver of long-term declines in the variety of big fish. "This study brings to the surface something th...

Amazon source of 5-year-old river breath

...on-credit trading as a means of grappling with the impacts of human-induced climate change, knowing how much carbon can be stored ?and where and for how long ?is critical, the authors say. "Our results were surprising because those who've previously made measurements found carbon in the rivers that came fro...

One hit of crystal meth causes birth defects

...amine causes other lasting damage in mice, such as impacts on learning and memory. "Methamphetamine has very different toxic effects in the fetal brain than in adult mice, which surprised me," says Wells. "In adults, you can see actual structural degeneration of the brain." U of T doctoral candidates Winni...

Assessing the Amazon River's sensitivity to deforestation

...ta from several disciplines to assess the possible impacts of future human-induced land cover and land use change, researchers are investigating the causes of changes to stream hydrology and biogeochemistry. The Amazon, one of the most important watersheds on the planet and the largest river in the world, i...

Could better mangrove habitats have spared lives in the 2004 tsunami?

...ove ecosystems might have influenced the tsunami's impacts on coastal communities. The research represents a collaborative effort, with participants from the Vrije Universiteit Brussel, Belgium; the University of Ruhuna, Sri Lanka; the Kenya Marine and Fisheries Research Institute; and the Institut Français...

Stem Cells to Solve the Blood Shortage Problem?

...ove ecosystems might have influenced the tsunami's impacts on coastal communities. The research represents a collaborative effort, with participants from the Vrije Universiteit Brussel, Belgium; the University of Ruhuna, Sri Lanka; the Kenya Marine and Fisheries Research Institute; and the Institut Français...

OHSU research shows vitamin C counteracts some negative impacts of smoking on unborn babies

...n C may have potential to counteract some negative impacts of smoking in unborn babies. The research may bene...vitamin C did not counteract other negative health impacts of smoking during pregnancy such as abnormal brain development and decreased body weight. The scient...

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

...egraded. Desertification has other strong adverse impacts on non-drylands as well. In addition to dust storms, biophysical impacts include downstream flooding, impairment of global carbon sequestration capacity, and regional and gl...

Woods Hole Research Center plans controlled burn in Amazon rainforest

...e first of several times, to simulate the repeated impacts of escaped agricultural fires that burn through th...Nepstad, "This experiment allows us to measure the impacts of recurring fire on the forest by comparing the trees, the animals, the leaf canopy, and the soil b...

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