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Tag: "atmospheric" at biology news

Plants respond similarly to signals from friends, enemies

...special structures called nodules, where they turn atmospheric nitrogen into usable nitrogen for the plant and, in return, take some of the plant's energy to survive. A similar relationship appeared when Weerasinghe studied the signals between plants and nematodes, even though the nematode provides no benefit to...

Poplar trees redirect resources in response to simulated attack

...esist microbial attack after plants have soaked up atmospheric carbon dioxide, therefore countering the effects of fossil-fuel combustion. This is a strategy of carbon sequestration -- the provision of long-term storage of carbon so that the buildup of carbon dioxide in the atmosphere will be reduced. IMAGES/CA...

Plant hemoglobins: Oxygen handlers critical for nitrogen fixation

...accommodate bacteria, called rhizobia, that reduce atmospheric nitrogen to ammonia, which is subsequently used by the plant for growth and colonization of nitrogen-poor soils. Symbiotic nitrogen fixation is important for sustainable agriculture and contributes millions of tons of reduced nitrogen to crops and pa...

New research indicates a 'troubled' greenhouse is brewing

...event. "This is known to have been a time of high atmospheric carbon dioxide from studies of the breathing pores in fossil leaves," he explains. "At that time, Wyoming warmed from a mean annual temperature of some 55 degrees to a summer-like 65 degrees Fahrenheit. Rainfall in Utah jumped from 16 inches per year...

Survey finds silver contamination in North Pacific waters

... most likely source of the silver contamination is atmospheric emissions from coal burning in Asia," said Russell...lver concentrations in the North Pacific trace the atmospheric depositions of industrial aerosols from Asia, with the highest concentrations in those waters closes...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...arom and his co-workers proposed that, under ideal atmospheric conditions, low-frequency calls could travel 6 miles or more through the air. Now in private industry, Larom has long been intrigued by O'Connell-Rodwell's work. "This is important basic research," he says. "Like all creatures, humans perceive with ...

Low oxygen likely made Great Dying worse, greatly delayed recovery

...ington scientists suggests that a sharp decline in atmospheric oxygen levels was likely a major reason for both t...bert Berner at Yale University has calculated that atmospheric oxygen began plummeting soon after, reaching about 16 percent at the end of the Permian and bottomin...

Scientists reveal the shape of a protein that helps retroviruses break into cells

...ington scientists suggests that a sharp decline in atmospheric oxygen levels was likely a major reason for both t...bert Berner at Yale University has calculated that atmospheric oxygen began plummeting soon after, reaching about 16 percent at the end of the Permian and bottomin...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...studying a variety of complex systems (ecosystems, atmospheric systems, neurobiological systems, cardiac rhythms, market systems) and their dynamics and have been proven in small-scale ecological applications, medical applications, meteorological applications and in financial applications by investment banks. "...

A hope for oil spill bioremediation

...pleted as compared with the typical marine DIC and atmospheric dissolved CO2. The sampling area is an energetic system poor in organic mater. Consequently, the anomalous DIC isotopic composition of certain samples taken along the shore of a contaminated island in the Cíes archipelago showed degradation of a dep...

Atmosphere may cleanse itself better than previously thought

...ncisco, have learned that some naturally occurring atmospheric chemicals react with sunlight more effectively tha...id Francisco, who is a professor of both earth and atmospheric sciences and chemistry in Purdue’s College of Science. "We now have a better understanding of an atm...

Deep sea algae connect ancient climate, carbon dioxide and vegetation

...is colleagues mapped the first detailed history of atmospheric carbon dioxide between 45 - 25 million years ago b...dicates that between 45 - 34 million years ago the atmospheric carbon dioxide level was up to five times greater than today, with a sharp decrease and then stabili...

Invasive parasite destroying fish species

...is colleagues mapped the first detailed history of atmospheric carbon dioxide between 45 - 25 million years ago b...dicates that between 45 - 34 million years ago the atmospheric carbon dioxide level was up to five times greater than today, with a sharp decrease and then stabili...

Stem cells grown in lab mirror normal developmental steps

...is colleagues mapped the first detailed history of atmospheric carbon dioxide between 45 - 25 million years ago b...dicates that between 45 - 34 million years ago the atmospheric carbon dioxide level was up to five times greater than today, with a sharp decrease and then stabili...

Hybrid grass may prove to be valuable fuel source

...nces. That balance means there is no net effect on atmospheric carbon dioxide levels, which is not the case with fossil fuels, she said. Miscanthus also is a very efficient fuel, because the energy ratio of input to output is less than 0.2, Heaton said. In contrast, the ratios exceed 0.8 for ethanol and biodies...

MERIS monitoring tracks planetary photosynthesis levels

...ols to minimise the effects due to scattering from atmospheric particles, the presence of soils and the changing geometry of illumination and observation." The validation of MGVI is in fact an ongoing activity, along with that for a family of related FAPAR algorithms developed by JRC for other satellite senso...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...22, 2005, issue of Science Express. The resulting atmospheric heating in the region of northern Alaska is equiva.... Continuation of this trend could further amplify atmospheric heating in the region by two to seven times and could possibly contribute to broader changes in clim...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...But new research led by a University of Washington atmospheric scientist shows that, in some regions, nitrogen ox...il, said Lyatt Jaeglé, a UW assistant professor of atmospheric sciences. The new research shows that the component from soil is about 70 percent greater than scien...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...llutant sources. Complex chemical interactions and atmospheric processes can transport these pollutants across th...e recently launched Aura, along with sophisticated atmospheric chemistry models that can forecast the global distribution and concentration of one particular pollu...

Disappearing arctic lakes linked to climate change

...ctivities as well as changes to local and regional atmospheric conditions, including more localized wind and more frequent and more severe wildland fires." ...

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