Document Detail

The evolution and future of Earth's nitrogen cycle.
MedLine Citation:
PMID:  20929768     Owner:  NLM     Status:  MEDLINE    
Atmospheric reactions and slow geological processes controlled Earth's earliest 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 agricultural practices to satisfy a growing global demand for food has drastically disrupted the nitrogen cycle. This has led to extensive eutrophication of fresh waters and coastal zones as well as increased inventories of the potent greenhouse gas nitrous oxide (N(2)O). Microbial processes will ultimately restore balance to the nitrogen cycle, but the damage done by humans to the nitrogen economy of the planet will persist for decades, possibly centuries, if active intervention and careful management strategies are not initiated.
Donald E Canfield; Alexander N Glazer; Paul G Falkowski
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.; Review    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  330     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-10-08     Completed Date:  2010-11-02     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  192-6     Citation Subset:  IM    
Institute of Biology and Nordic Center for Earth Evolution, University of Southern Denmark, Campusvej 55, Odense M, Denmark.
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MeSH Terms
Archaea / genetics,  metabolism*
Bacteria / genetics,  metabolism*
Crops, Agricultural / growth & development,  metabolism
Ecological and Environmental Processes
Eukaryota / genetics,  metabolism*
Evolution, Planetary
Nitrogen / chemistry*,  metabolism*
Nitrogen Compounds / chemistry,  metabolism
Physicochemical Processes
Reg. No./Substance:
0/Nitrogen Compounds; 7727-37-9/Nitrogen

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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