Document Detail

The rise of oxygen over the past 205 million years and the evolution of large placental mammals.
MedLine Citation:
PMID:  16195457     Owner:  NLM     Status:  MEDLINE    
On the basis of a carbon isotopic record of both marine carbonates and organic matter from the Triassic-Jurassic boundary to the present, we modeled oxygen concentrations over the past 205 million years. Our analysis indicates that atmospheric oxygen approximately doubled over this period, with relatively rapid increases in the early Jurassic and the Eocene. We suggest that the overall increase in oxygen, mediated by the formation of passive continental margins along the Atlantic Ocean during the opening phase of the current Wilson cycle, was a critical factor in the evolution, radiation, and subsequent increase in average size of placental mammals.
Paul G Falkowski; Miriam E Katz; Allen J Milligan; Katja Fennel; Benjamin S Cramer; Marie Pierre Aubry; Robert A Berner; Michael J Novacek; Warren M Zapol
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Science (New York, N.Y.)     Volume:  309     ISSN:  1095-9203     ISO Abbreviation:  Science     Publication Date:  2005 Sep 
Date Detail:
Created Date:  2005-09-30     Completed Date:  2005-10-07     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2202-4     Citation Subset:  IM    
Institute of Marine and Coastal Sciences, Rutgers University, 71 Dudley Road, New Brunswick, NJ 08901, USA.
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MeSH Terms
Body Size
Carbon / analysis
Carbon Dioxide / analysis
Carbon Isotopes / analysis
Geologic Sediments / chemistry
Mammals* / anatomy & histology,  physiology
Oxygen* / analysis
Phytoplankton / physiology
Placenta / physiology
Regression Analysis
Sulfur Isotopes / analysis
Reg. No./Substance:
0/Carbon Isotopes; 0/Carbonates; 0/Sulfur Isotopes; 124-38-9/Carbon Dioxide; 7440-44-0/Carbon; 7782-44-7/Oxygen

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

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