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

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/52084

Title: Linear relationship between carbon and nitrogen isotope ratios along simple food chains in marine environments
Authors: Aita, Maki Noguchi Browse this author
Tadokoro, Kazuaki Browse this author →KAKEN DB
Ogawa, Nanako O. Browse this author →KAKEN DB
Hyodo, Fujio Browse this author
Ishii, Reiichiro Browse this author →KAKEN DB
Smith, S. Lan Browse this author
Saino, Toshiro Browse this author →KAKEN DB
Kishi, Michio J. Browse this author →KAKEN DB
Saitoh, Sei-ichi Browse this author →KAKEN DB
Wada, Eitaro Browse this author →KAKEN DB
Keywords: Stable isotopes
Nitrogen
Carbon
Food chain
Isotopic fractionation
Issue Date: Nov-2011
Publisher: Oxford University Press
Journal Title: Journal of Plankton Research
Volume: 33
Issue: 11
Start Page: 1629
End Page: 1642
Publisher DOI: 10.1093/plankt/fbr070
Abstract: To examine the relationship between carbon and nitrogen stable isotope (SI) ratios (δ13C and δ15N) 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 δ15N–δ13C 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 δ15N, the δ15N versus δ13C 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 δ15N versus δ13C 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.
Type: article (author version)
URI: http://hdl.handle.net/2115/52084
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 岸 道郎

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