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Latest Nitrogen cycle Stories

2009-07-07 11:06:54

Biologists know that when plants battle for sNitrogen research shows how some plants invade, take over otherspace, often the actual battle is for getting the nitrogen.Now, research at the University of Nebraska-Lincoln gives important new information on how plants can change "nitrogen cycling" to gain nitrogen and how this allows plant species to invade and take over native plants.In an article published July 6 in the scientific journal Proceedings of the National Academy of Sciences, UNL...

2009-06-04 14:18:25

More and more, scientists are getting a better grip on the nitrogen cycle. They are learning about sources of nitrogen and how this element changes as it loops from the nonliving, such as the atmosphere, soil or water, to the living, whether plants or animals. Scientists have determined that humans are disrupting the nitrogen cycle by altering the amount of nitrogen that is stored in the biosphere.The chief culprit is fossil fuel combustion, which releases nitric oxides into the air that...

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2008-11-14 13:55:00

Leads scientists to rethink ocean's carbon and nitrogen cycles An unusual microorganism discovered in the open ocean may force scientists to rethink their understanding of how carbon and nitrogen cycle through ocean ecosystems. A paper describing the new findings appears in the November 14 issue of the journal Science. A research team led by Jonathan Zehr, a marine scientist at the University of California, Santa Cruz, characterized the new microbe by analyzing its genetic material, even...

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2008-10-07 09:19:38

Scientists have found lichens can give insight into nitrogen air pollution effects on Sierra Nevada and San Bernardino mountain ecosystems, and protecting them provides safeguards for less sensitive species. Their findings are presented this month in the international journal Environmental Pollution and are significant because nitrogen from air pollution causes detrimental chemical and biological effects to terrestrial and aquatic ecosystems. Other harmful effects include elevated nitrate...

2008-08-08 12:00:15

Scientists at Britain's University of Sheffield say they've used mathematical computer models to show how bacteria might become a future source for fuels. The researchers mapped the metabolism of Nostoc, a bacterium that fixes nitrogen and, in doing so, releases hydrogen that can potentially be used as fuel. "The research uncovered a previously unknown link between the energy machinery of the Nostoc bacterium and its core nitrogen metabolism," said Guido Sanguinetti, a Sheffield lecturer...

2008-07-02 06:00:47

By Pedros, P B Onnis-Hayden, A; Tyler, Charles ABSTRACT: The purpose of this study was to investigate the nitrification and nitrogen removal from centrate produced in the dewatering process of anaerobically digested sludge, using a single- unit, single-zone submerged attached-growth bioreactor. The nitrogen loading varied from 0.54 to 1.51 kg-N/m^sup 3^ . d. Stable ammonia oxidation (nitritification) to nitrite was demonstrated. A nitritification efficiency of 98% was achieved, while the...

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2008-03-12 15:50:00

The plight of the world's oceans is dire, according to recent studies, through insults from human-derived activities depopulating and damaging reefs, altering coastlines, and creating pollutants, such as nitrogen runoff from terrestrial watersheds. A study by 31 aquatic biologists involving 72 stream sites in the United States and Puerto Rico has found that one critical buffer to excess nitrogen run off from agricultural and urban areas turns out to be small streams and rivers. The findings...

2008-01-24 14:13:10

Like bank accounts, the nutrient cycles that influence the natural world are regulated by inputs and outputs. If a routine withdrawal is overlooked, balance sheets become inaccurate. Over time, overlooked deductions can undermine our ability to understand and manage ecological systems. Recent research by the Universit© de Montr©al (Canada) and the Cary Institute of Ecosystem Studies (Millbrook, New York) has revealed an important, but seldom accounted for, withdrawal in the global...

2005-06-08 18:07:54

EAST LANSING, Mich. "“ It seems a mighty feat for a microscopic fungus built from threadlike filaments. But collectively, these spindly mushroom relatives help move several billion tons of nutrients out of the soil and into plants each year. Now, new Michigan State University-supported research on the movement of nitrogen brings into sharper focus this underground process at the root of nearly all of Earth's food chains. "Ignorance (about the movement of nitrogen) limits our...


Word of the Day
out-herod
  • In the phrase to out-herod Herod, to be more violent than Herod (as represented in the old mystery plays); hence, to exceed in any excess of evil.
Herod refers to 'Herod the Great,' a Roman client king and 'a madman who murdered his own family and a great many rabbis.' According to the OED, the term is 'chiefly with allusion to Shakespeare's use' in Hamlet.
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