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          Document History for Document ID 8243

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Document Version Version Comment Date Status
8243.0 [No comment] 19.06.2008 13:32 Released

ID: 8243.0, MPI für Evolutionsbiologie / Ecophysiology
Using stable isotope analyses to identify allochthonous inputs to Lake Naivasha mediated via the hippopotamus gut
Authors:Grey, J.; Harper, D. M.
Language:English
Date of Publication (YYYY-MM-DD):2002
Title of Journal:Isotopes in Environmental and Health Studies
Journal Abbrev.:Isotopes Environ. Health Stud.
Volume:38
Issue / Number:4
Start Page:245
End Page:250
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:The hippopotamus grazes nocturnally on land and resides in water during the day. Much of the ingested material must therefore be defecated directly into the aquatic system and can thus be considered an allochthonous resource available to aquatic consumers. The utility of stable isotope analyses of carbon and nitrogen to distinguish hippo faecal matter from other potential basal resources was tested at Lake Naivasha, Kenya. Hippopotami proved faithful to a short grass diet although supplementary grazing of aquatic macrophytes was observed. The typical isotopic ratios of C4 grasses ingested were not altered substantially by gut processes, and were clearly distinct from algal and aquatic macrophyte isotopic ratios. However, marginal plants such as Cyperus papyrus exhibit C4 ratios, and so the technique is suitable only for use in localities where 'contamination' from such sources is negligible
Free Keywords:allochthonous; c4 plants; carbon 13; hippopotamus; Lake Naivasha; natural variations; nitrogen 15
External Publication Status:published
Document Type:Article
Affiliations:MPI für Evolutionsbiologie/Abt. Ökophysiologie
External Affiliations:Dept. of Biology, University of Leicester, University Road, Leicester, UK
Identifiers:ISSN:1025-6016 (print) [ID-No:1]
ISSN:1477-2639 (online) [ID-No:2]
DOI:10.1080/1025601021000065029 [ID-No:3]
LOCALID:2132/S 37846 [Listen-Nummer/S-Nummer]
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