... be used by organisms. That was the beginning of what today is known as the aerobic nitrogen cycle.
The microbes that accomplished that feat are on the last, or terminal, branches of the bacteria ...
New research shows that the large-scale evolution of microbes was mostly complete 2.5 billion years ago, and that included the beginning of the modern aerobic nitrogen cycle.
... a rapid increase in fossil fuel emissions.
"What we find is there has been this significant change to the nitrogen cycle over the past 300 years," said Meredith Hastings, assistant professor of ...
... departments of civil and environmental engineering and microbiology. "We have to revise our basic understanding of the nitrogen cycle."
In the tree of life, archaea occupy their own branch. Archaea ...
... of East Anglia (UEA).
It has long been known that man is enhancing the global nitrogen cycle through the use of fertilisers in agriculture and the burning of fossil fuels in power stations and cars ...
... the 2008 Tyler Prize for environmental science, is a longtime contributor to the growing understanding of how nitrogen cycles endlessly through the environment. In numerous studies over the years he ...
... by Dr. Robert Duce from Texas A&M, the study highlights the importance of the Earth’s nitrogen cycle, and its vital link to the global carbon cycle, especially the atmospheric concentration of CO2, ...
... nitrogen cycle plays a major role in seagrass fields. Dutch researcher Arie Vonk ... seagrasses, animals and microorganisms results in an efficient nitrogen cycle in tropical seagrass fields. Consequently ...
... capable of using various forms of nitrogen -- discoveries that have involved a number of University of Washington researchers -- is one reason to rethink what we know about the nitrogen cycle.
... the environment may determine how ecosystems respond to global warming. But certain aspects of the nitrogen cycle in temperate and tropical forests have puzzled scientists, defying, in a sense, the ...
... Publicity surrounds the carbon cycle and its effects on the environment, but humans have altered the global nitrogen cycle to a greater degree," said Mark Fenn, a Forest Service plant pathologist and ...
... of Agriculture provides some answers. The research, which is focused on the tree species control on nitrogen cycling dynamics in the Catskill Mountains, is published in the March-April 2009 issue of ...
... can model it, and the better we can understand its role in the context of the global carbon and nitrogen cycles."
In a new study to be published Monday in the Early Edition of the Proceedings of the ...
... out of the soil, especially in the degraded old fields that were studied.
Knowing this finding about nitrogen cycling with the white pine species may lead to important discoveries in how to stop ...
... Earth's physical features.
"Historically, biogeochemists have focused on specific cycles, such as the carbon cycle or the nitrogen cycle," said Tim Killeen, NSF assistant director for geosciences. " ...
