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Tag: "atmosphere" at biology news

Growth in the sea comes down to a struggle for iron

...logic past may have removed enough carbon from the atmosphere to affect global climate, perhaps even contributing to the onset of ice ages. Martin died in 1993 just as tests of his ideas were getting underway, but scientists have embarked on a series of experiments in three major areas of the world's oceans. "...

Poplar trees redirect resources in response to simulated attack

...arbon so that the buildup of carbon dioxide in the atmosphere will be reduced. IMAGES/CAPTIONS: http://www.bnl.gov/bnlweb/pubaf/pr/photos/2005/D3150503_FERRIERI-300.jpg Richard Ferrieri (L) and co-author Dennis Gray, now with the University of Connecticut, position a plant leaf in one of BNL's positron emissio...

World's largest rainforest drying experiment completes first phase

...change since the amount of carbon removed from the atmosphere during tropical droughts will decrease significant...The amount of carbon that could be released to the atmosphere by this savannization process is significant --equivalent to several years of worldwide carbon emiss...

Family trees of ancient bacteria reveal evolutionary moves

...ose on the Earth. This was a time when the Earth's atmosphere had an incredible, mysterious and inexplicable rise in oxygen, from extremely low levels to 10 percent of what it is today. There were three ?some say four ?global glaciations, and the fossil record reflects a major shift in the number of organisms m...

How the environment could be damaging men's reproductive health

...ashed off the land into the sea. Additionally, the atmosphere plays an important role in their transport over long distances. POPs have a strong tendency to bioaccumulate in marine and terrestrial food webs. Humans, being at the top of the food web, particularly are exposed to POPs." The researchers found that...

Survey finds silver contamination in North Pacific waters

...able tool for tracing those emissions, both in the atmosphere and in the water," she said. Prevailing westerly winds carry atmospheric pollution across the North Pacific ocean from China, where coal is the primary fuel and the use of emissions controls is limited. Major pollutants from the burning of coal are ...

NASA study finds snow melt causes large ocean plant blooms

...the amount of solar energy reflected back into the atmosphere is less. A decline in the amount of snow cover means less of the sun's energy goes towards melting of snow and evaporation of wet soil. As a result the land mass heats up more in summer creating a larger temperature difference between the water of th...

Currents could disrupt ocean food chain

... are pulled northward where they are cooled by the atmosphere in the North Atlantic. As the water cools, it sinks 2,000 to 3,000 meters and begins flowing southward. The upwelling from the mixing of waters constantly replenishes the supply of phytoplankton at the surface, forming a rich nutrient source at the b...

Nanobacteria in clouds could spread disease, scientists claim

...urine and their dispersal from the ground into the atmosphere and stratosphere appears to be inevitable," said D...rosols (airborne contaminants) and proteins in the atmosphere reported in New Scientist (31 March) and Science (1 April). The contribution of nanobacteria to path...

Atmosphere may cleanse itself better than previously thought

...f California, San Diego has found that the Earth’s atmosphere may be more effective at cleansing itself of smog ...hese chemicals in action, we now theorize that the atmosphere may produce up to 20 percent more OH radicals from these chemicals than we once thought," said Franc...

Scientists find viruses can't stick to sea bugs in the dark

...att University, Edinburgh. Our earth's breathable atmosphere relies on millions and millions of cyanobacteria in the seas absorbing the sun's light and giving off oxygen, in exactly the same way as the photosynthetic plants and forests on land act as the other part of the planet's lungs. But the whole delicate...

Study of energy and health in Africa focuses spotlight on charcoal and forest management

...h over 15 billion tons of carbon released into the atmosphere by 2050. "Most charcoal is produced in Africa by one or two guys going out in the woods, almost always without a permit and on somebody else's land, cutting down a tree or two, chopping it up, lighting it, covering it with dirt, and then hovering ar...

Amazon source of 5-year-old river breath

...sumed that the return of this forest carbon to the atmosphere must be a slow process that offered at least tempo...t of carbon dioxide silently being returned to the atmosphere is far younger than carbon being carried downstream," he said. "Previous studies failed to detect th...

Proteomics brings researchers closer to understanding microbes that produce acid mine drainage

...n the biofilm capture carbon and nitrogen from the atmosphere and derive energy from iron that has been leached out of the iron sulfide rock, also known as pyrite or "fool's gold." In the process, they produce sulfuric acid that leaches more iron from the pyrite and releases other heavy metals. Last year's fea...

Deep sea algae connect ancient climate, carbon dioxide and vegetation

...ate and the concentration of carbon dioxide in the atmosphere during the late Eocene and Oligocene was largely unknown," said Pagani, who is recognized for his reconstruction of past atmospheric carbon dioxide levels between 25 million and eight million years ago. They also present intriguing evidence that the...

Invasive parasite destroying fish species

...ate and the concentration of carbon dioxide in the atmosphere during the late Eocene and Oligocene was largely unknown," said Pagani, who is recognized for his reconstruction of past atmospheric carbon dioxide levels between 25 million and eight million years ago. They also present intriguing evidence that the...

Stem cells grown in lab mirror normal developmental steps

...ate and the concentration of carbon dioxide in the atmosphere during the late Eocene and Oligocene was largely unknown," said Pagani, who is recognized for his reconstruction of past atmospheric carbon dioxide levels between 25 million and eight million years ago. They also present intriguing evidence that the...

Oxygen increase caused mammals to triumph, researchers say

...uous record of oxygen concentration in the earth's atmosphere shows that a sharp rise in oxygen about 50 million...s to estimate precisely how much oxygen was in the atmosphere at any given time, Falkowski says. From a steady 10 percent ?the level at which dinosaurs flourish...

MERIS monitoring tracks planetary photosynthesis levels

... a 'sink' of carbon that might otherwise enter the atmosphere as carbon dioxide and hasten global warming. Envisat's Medium Resolution Imaging Spectrometer (MERIS) acquires multispectral imagery of the Earth, and is used to monitor the state and evolution of the planetary vegetation cover. In particular the i...

Microbe has huge role in ocean life, carbon cycle

...forms of plant and animal life, not to mention the atmosphere and fossil fuel formation." SAR11 was first discovered at OSU in 1990. Since then researchers have learned that populations of SAR11 increase during the summer and decrease during the winter, in a cycle that correlates to the ebb and flow of organic...

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