Document Detail


Scale invariance in food web properties.
MedLine Citation:
PMID:  2740915     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The robustness of five common food web properties is examined by varying the resolution of the data through aggregation of trophic groupings. A surprising constancy in each of these properties is revealed as webs are collapsed down to approximately half their original size. This analysis of 60 invertebrate-dominated community food webs confirms the existence of all but one of these properties in such webs and addresses a common concern held by critics of food web theory that observed food web properties may be sensitive to trophic aggregation. The food web statistics (chain length; predator/prey ratio; fraction of top, intermediate, and bottom species; and rigid circuits) are scaling in the sense that they remain roughly invariant over a wide range of data resolution. As such, within present standards of reporting food web data, these statistics may be used to compare systems whose trophic data are resolved differently within a factor of 2.
Authors:
G Sugihara; K Schoenly; A Trombla
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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:  245     ISSN:  0036-8075     ISO Abbreviation:  Science     Publication Date:  1989 Jul 
Date Detail:
Created Date:  1989-08-02     Completed Date:  1989-08-02     Revised Date:  2007-03-19    
Medline Journal Info:
Nlm Unique ID:  0404511     Medline TA:  Science     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  48-52     Citation Subset:  IM    
Affiliation:
Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA 92093.
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MeSH Terms
Descriptor/Qualifier:
Animals
Food*
Food Supply
Invertebrates
Models, Biological

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


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