MISC

2011年11月

Linear relationship between carbon and nitrogen isotope ratios along simple food chains in marine environments

JOURNAL OF PLANKTON RESEARCH
  • Maki Noguchi Aita
  • ,
  • Kazuaki Tadokoro
  • ,
  • Nanako O. Ogawa
  • ,
  • Fujio Hyodo
  • ,
  • Reiichiro Ishii
  • ,
  • S. Lan Smith
  • ,
  • Toshiro Saino
  • ,
  • Michio J. Kishi
  • ,
  • Sei-Ichi Saitoh
  • ,
  • Eitaro Wada

33
11
開始ページ
1629
終了ページ
1642
記述言語
英語
掲載種別
DOI
10.1093/plankt/fbr070
出版者・発行元
OXFORD UNIV PRESS

To examine the relationship between carbon and nitrogen stable isotope (SI) ratios (delta C-13 and delta N-15) of zooplankton, we analyzed samples collected bimonthly from March to October 2009, from the euphotic layers of the Oyashio current along the A-line in the western North Pacific. Isotopic ratios of higher trophic levels such as predatory zooplankton and/or long-lived zooplankton varied little with season, while those of short-lived zooplankton were variable on the delta N-15-delta C-13 map. We also analyzed preserved samples taken from the warm-core ring 86-B derived from the Kuroshio extension region. Although the zooplankton groups in the two regions exhibited different values in delta N-15, the delta N-15 versus delta C-13 slopes for each ecosystem do not show significant differences. Statistical analysis conducted together with previously published data from the Antarctic Ocean and the Gulf of Alaska suggested a similar delta N-15 versus delta C-13 slope throughout the four regions. We attributed this common slope to physiological aspects of feeding processes (e. g. the kinetic isotope effects inherent in the processes of amino acid synthesis). The common pattern for all four oceanic regions suggests that SIs may be used to elucidate general patterns in ecosystems and biogeochemical cycles.

Web of Science ® 被引用回数 : 16

リンク情報
DOI
https://doi.org/10.1093/plankt/fbr070
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000295507500001&DestApp=WOS_CPL