Isotopic variation complicates analysis of trophic relations within the fish community of Plußsee: a small, deep, stratifying lake
Data(s) |
2006
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Resumo |
Analysis of carbon and nitrogen stable isotopes has allowed freshwater ecologists to examine lake food webs in increasing detail. Many such studies have highlighted the existence of separate within-lake pelagic and benthic-littoral food webs but are typically conducted on large (> 10 km2) lakes, whereas the majority of lakes are actually relatively small. We used stable isotope analysis (δ13C & δ15N) to examine trophic interactions between fish and their prey in Plu�see, as an example of a small, stratifying lake, and to determine whether separate pelagic/benthic-littoral food webs could be distinguished in such systems. Our results indicate that the Plu�see food web was complicated, and due to extensive intra-annual isotopic variation in zooplankton (e.g. cladoceran δ13C annual range = 25.6�), it may be impossible to definitively assign consumers from small, eutrophic stratified lakes to pelagic or benthic-littoral food webs. We present evidence that some components of the Plu�see food web (large bream) may be subsidised by carbon of methanogenic origin. |
Identificador |
http://dx.doi.org/10.1127/0003-9136/2006/0167-0281 http://www.scopus.com/inward/record.url?scp=33750221879&partnerID=8YFLogxK |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Harrod , C 2006 , ' Isotopic variation complicates analysis of trophic relations within the fish community of Plußsee: a small, deep, stratifying lake ' Archiv für Hydrobiologie , vol 167 , no. 1-4 , pp. 281-299 . DOI: 10.1127/0003-9136/2006/0167-0281 |
Palavras-Chave | #/dk/atira/pure/subjectarea/asjc/1100/1104 #Aquatic Science |
Tipo |
article |