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Comparisons between POC and zooplankton swimmer flux from sediment traps in the subarctic and subtropical North Pacific

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Title: Comparisons between POC and zooplankton swimmer flux from sediment traps in the subarctic and subtropical North Pacific
Authors: Yokoi, Naoya Browse this author
Abe, Yoshiyuki Browse this author
Kitamura, Minoru Browse this author →KAKEN DB
Honda, Makio C. Browse this author →KAKEN DB
Yamaguchi, Atsushi Browse this author →KAKEN DB
Keywords: Sediment trap
Swimmer
Copepoda
Active carbon flux
Issue Date: Mar-2018
Publisher: Elsevier
Journal Title: Deep Sea Research Part I: Oceanographic Research Papers
Volume: 133
Start Page: 19
End Page: 26
Publisher DOI: 10.1016/j.dsr.2018.01.003
Abstract: Seasonal changes in zooplankton swimmer (ZS) abundance, biomass and community structure were evaluated based on samples collected by moored sediment traps at a depth of 200 m in the subarctic (SA) and subtropical (ST) western North Pacific. Based on these samples, we made comparisons on two topics: 1) latitudinal (subarctic vs. subtropical) changes in ZS abundance, biomass and community and 2) quantitative differences between the ZS and particle organic carbon (POC) fluxes based on data from moored or drifting sediment traps. The results showed that the ZS flux was greater in the SA (annual mean: 311 ind. m−2 day−1 or 258 mg C m−2 day−1) than in the ST (135 ind. m−2 day−1 or 38 mg C m−2 day−1). The peak ZS flux was observed from July–August in the SA and from April–May in the ST. The dominant taxa were Copepoda and Chaetognatha in the SA and Ostracoda and Mollusca in the ST. These latitudinal differences are likely related to the dominance of large-sized Copepoda in the SA, regional differences in the timing of the spring phytoplankton bloom, and the magnitude and size structure of primary producers. The percent composition of ZS to the total C flux (= ZS+POC flux) varied by region: 85–95% in the SA and 47–75% in the ST. These differences between the ZS composition and the total C flux are most likely caused by the dominance of large-sized Copepoda (Neocalanus spp. and Eucalanus bungii) in the SA.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/
https://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/76827
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: 山口 篤

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