Document Detail

Productivity, consumers, and the structure of a river food chain.
MedLine Citation:
PMID:  11607368     Owner:  NLM     Status:  PubMed-not-MEDLINE    
We tested models of food chain dynamics in experimentally manipulated channels within a natural river. As light levels increased, primary productivity and the biomass of algae and primary predators increased, but the biomass of grazers remained relatively constant. In the presence of a fourth trophic level, algae and primary predators decreased, but grazers increased. These results match predictions of food chain models based on classical predator-prey theory and suggest that simple models of multitrophic level interactions are sometimes sufficient to predict the responses of natural communities to changes in environmental productivity and predators.
J T Wootton; M E Power
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Proceedings of the National Academy of Sciences of the United States of America     Volume:  90     ISSN:  0027-8424     ISO Abbreviation:  Proc. Natl. Acad. Sci. U.S.A.     Publication Date:  1993 Feb 
Date Detail:
Created Date:  2001-10-18     Completed Date:  2001-12-07     Revised Date:  2010-09-14    
Medline Journal Info:
Nlm Unique ID:  7505876     Medline TA:  Proc Natl Acad Sci U S A     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1384-7     Citation Subset:  -    
Department of Integrative Biology, University of California, Berkeley, CA 94720, USA.
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