| Productivity, consumers, and the structure of a river food chain. | |
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MedLine Citation:
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PMID: 11607368 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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J T Wootton; M E Power |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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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:
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Created Date: 2001-10-18 Completed Date: 2001-12-07 Revised Date: 2010-09-14 |
Medline Journal Info:
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Nlm Unique ID: 7505876 Medline TA: Proc Natl Acad Sci U S A Country: United States |
Other Details:
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Languages: eng Pagination: 1384-7 Citation Subset: - |
Affiliation:
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Department of Integrative Biology, University of California, Berkeley, CA 94720, USA. |
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