Science, Volume 330, Issues 6000-6004John Michels (Journalist) American Association for the Advancement of Science, 2010 |
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Page 192
... nitrogen cycle , and by ~ 2.7 billion years ago , a linked suite of microbial processes evolved to form the modern nitrogen cycle with robust natural feedbacks and controls . Over the past century , however , the development of new ...
... nitrogen cycle , and by ~ 2.7 billion years ago , a linked suite of microbial processes evolved to form the modern nitrogen cycle with robust natural feedbacks and controls . Over the past century , however , the development of new ...
Page 194
... Nitrogen Cycle Respond to Changes in Earth's Surface Chemistry ? Both the evolutionary history of nitrogen metab- olisms as well as their intensity depended on the evolution of Earth's surface chemistry . Hence , although the anaerobic ...
... Nitrogen Cycle Respond to Changes in Earth's Surface Chemistry ? Both the evolutionary history of nitrogen metab- olisms as well as their intensity depended on the evolution of Earth's surface chemistry . Hence , although the anaerobic ...
Page 195
... nitrogen flux in the modern nitrogen cycle depend on the efficiency of the transformations between reservoirs . Arrow size reflects relative size of the flux . The dark brown arrows represent anthropogenic inputs ( 25 , 45 , 46 , 52 ...
... nitrogen flux in the modern nitrogen cycle depend on the efficiency of the transformations between reservoirs . Arrow size reflects relative size of the flux . The dark brown arrows represent anthropogenic inputs ( 25 , 45 , 46 , 52 ...
Contents
EDITORIAL | 11 |
NEWS OF THE WEEK | 18 |
A Dance of Extrasolar Planets | 47 |
Copyright | |
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