Document Detail

Role of food partitioning in structuring the zooplankton community in mountain lakes.
MedLine Citation:
PMID:  12827488     Owner:  NLM     Status:  MEDLINE    
Trophic-niche differentiation is often cited as a main factor in structuring zooplankton assemblages, although field evidence for this is rarely presented. The study was based on a survey of 29 Pyrenean lakes with altitudes ranging between 1,875 and 2,990 m carried out during July and August 2000. Because of the oligotrophic nature of these lakes, we aimed to confirm that food partitioning is a major factor in shaping zooplankton assemblages. We analysed the amino acid composition of six cladocera and seven copepod species. A discriminant analysis showed that each species could be distinguished according to its amino acid composition. A negative relationship between amino acid differentiation and co-occurrence among the cladocera and cyclopoid copepod was observed. In contrast, calanoids did not show any relationship and were characterised by a high amino acid differentiation between species. As the differences in the amino acid composition among zooplankton species indicate distinct food sources, the relationship found indicates that trophic-niche differentiation plays a key role in determining the assemblage of these zooplankton communities. Therefore exploitative competition, either at present or in the past by driving co-evolutionary histories, has been a significant factor in structuring the cladocera and cyclopoid communities in these oligotrophic lakes.
C Guisande; F Bartumeus; M Ventura; J Catalan
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2003-06-25
Journal Detail:
Title:  Oecologia     Volume:  136     ISSN:  0029-8549     ISO Abbreviation:  Oecologia     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-08-18     Completed Date:  2004-01-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0150372     Medline TA:  Oecologia     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  627-34     Citation Subset:  IM    
Facultad de Ciencias, Universidad de Vigo, Lagoas-Marcosende, 36200 Vigo, Spain.
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MeSH Terms
Amino Acids / analysis*
Cladocera / chemistry*
Copepoda / chemistry*
Food Chain
Population Dynamics
Water Supply*
Reg. No./Substance:
0/Amino Acids

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

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