Vertical Distribution, Community Structure, and Active Carbon Flux of Two Macrozooplankton Taxa : Amphipods and Euphausiids in the Summer of the Western North Pacific

DOI HANDLE Open Access

Abstract

This study conducted diel vertical migration and active migration flux estimation of macrozooplanktonic amphipods and euphausiids at 0-250 m water column of the three stations in the western North Pacific during summer. For amphipods, 25 species belonging to 17 genera were identified. Their standing stock was 60-574 ind. m−2 during the daytime and 35-5,228 ind. m−2 at night-time. For euphausiids, 19 species belonging to 7 genera were identified. The standing stock of euphausiids was 80-382 ind. m−2 and 286-2,156 ind. m−2 during the day and at night, respectively. Feeding impacts during the night were estimated to be 0.19-11.76 mg C m−2 day−1 (amphipods) and 5.12-16.42 mg C m−2 day−1 (euphausiids). Respiration during the daytime accounted for 0.08-6.38 mg C m−2 day−1 (amphipods) and 2.33-7.70 mg C m−2 day−1 (euphausiids). The feeding impact and respiratory flux by active migration of macrozooplankton taxa were estimated as 8.34-28.18 mg C m−2 day−1 and 3.15-14.08 mg C m−2 day−1, respectively. These values corresponded to 3.7-12.4% of primary production (feeding impact) and 2.4-10.7% of sinking passive flux from the euphotic zone (respiratory flux). Thus, this study emphasizes the importance of active flux by macrozooplankton for vertical material flux in the western North Pacific.

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Details 詳細情報について

  • CRID
    1390009224795964288
  • NII Article ID
    120006880736
  • DOI
    10.14943/bull.fish.70.1.77
  • ISSN
    24353353
  • HANDLE
    2115/79118
  • Text Lang
    en
  • Data Source
    • JaLC
    • IRDB
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Allowed

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