| Food web implications of delta13C and delta15N variability over 370 km of the regulated Colorado River USA. | |
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MedLine Citation:
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PMID: 11924849 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Dual stable isotope analysis in the regulated Colorado River through Grand Canyon National Park, USA, revealed a food web that varied spatially through this arid biome. Down-river enrichment of delta13C data was detected across three trophic levels resulting in shifted food webs. Humpack chub delta13C and delta15N values from muscle plugs and fin clips did not differ significantly. Humpback chub and rainbow trout trophic position is positively correlated with standard length indicating an increase in piscivory by larger fishes. Recovery of the aquatic community from impoundment by Glen Canyon Dam and collecting refinements for stable isotope analysis within large rivers are discussed. |
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Authors:
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J P Shannon; D W Blinn; G A Haden; E P Benenati; K P Wilson |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
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Title: Isotopes in environmental and health studies Volume: 37 ISSN: 1025-6016 ISO Abbreviation: Isotopes Environ Health Stud Publication Date: 2001 |
Date Detail:
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Created Date: 2002-04-01 Completed Date: 2002-08-27 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9602611 Medline TA: Isotopes Environ Health Stud Country: Netherlands |
Other Details:
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Languages: eng Pagination: 179-91 Citation Subset: IM |
Affiliation:
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Northern Arizona University, Department of Biological Sciences, Flagstaff 86011, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Carbon / analysis, metabolism* Carbon Isotopes / pharmacokinetics Diet Environmental Monitoring Fishes* Food Chain* Invertebrates Nitrogen / analysis, metabolism* Nitrogen Isotopes / pharmacokinetics |
| Chemical | |
Reg. No./Substance:
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0/Carbon Isotopes; 0/Nitrogen Isotopes; 7440-44-0/Carbon; 7727-37-9/Nitrogen |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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