論文

査読有り
1994年4月

A STABLE-ISOTOPE STUDY ON SEASONAL FOOD-WEB DYNAMICS IN A EUTROPHIC LAKE

ECOLOGY
  • T YOSHIOKA
  • ,
  • E WADA
  • ,
  • H HAYASHI

75
3
開始ページ
835
終了ページ
846
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2307/1941739
出版者・発行元
ECOLOGICAL SOC AMER

Phytoplankton, zooplankton, benthic invertebrates, and pond smelt were collected in a eutrophic lake (Lake Suwa, Japan) from spring to autumn in 1986 and 1987. Their stable carbon and nitrogen isotope ratios were analyzed together with conventional examination of the gut contents of pond smelt. Temporal variations in isotope ratios were similar among the organisms other than benthic animals. The deltaN-15 values of diet for several animals in the pelagic food web were estimated, assuming a stepwise enrichment in N-15 with increasing trophic level. A calanoid copepod, Eodiaptomus japonicus, seemed to feed on the predominant phytoplankton, including Microcystis spp., while Microcystis did not seem to be important as an organic source for other zooplankton and pond smelt. The temporal variation of the isotope ratios of pond smelt was well explained by visual gut content analysis. It is suggested that intensive measurements of carbon and nitrogen isotope ratios of each species serve to effectively assess the yearly dynamics of the food web structure in eutrophic lakes where productivity and species composition of plankton change seasonally.

リンク情報
DOI
https://doi.org/10.2307/1941739
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:A1994NE02900023&DestApp=WOS_CPL
ID情報
  • DOI : 10.2307/1941739
  • ISSN : 0012-9658
  • Web of Science ID : WOS:A1994NE02900023

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