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Title
  • ja 光学式プランクトンカウンターによる北太平洋外洋域における 動物プランクトン群集の空間変動解析
  • en Spatial Changes in Mesozooplankton Community Structure in the North Pacific : Analyses by Optical Plankton Counter
Creator
    • ja 塩田, 知也 en Shiota, Tomoya
    • ja 阿部, 義之 en Abe, Yoshiyuki
    • ja 齋藤, 類 en Saito, Rui
    • ja 松野, 孝平 en Matsuno, Kohei
Accessrights open access
Subject
  • Other en Mesozooplankton
  • Other en Neocalanus copepods
  • Other en Normalized biovolume size spectra (NBSS)
  • Other en Optical plankton counter (OPC)
  • Other en Size
  • NDC 660
Description
  • Abstract en Analyses by Optical Plankton Counter (OPC) were made on mesozooplankton samples (n = 1,396) collected by NORPAC net from 0-150 m along eight north-south transects (located 35-60°N, 144°E-145°W) covering whole area of North Pacific during May to August of 1981-2009. Based on OPC data, spatial (north-south and east-west) changes in mesozooplankton abundance, biovolume and Normalized Biovolume Size Spectra (NBSS) were evaluated. Throughout the transects, north-south variations in zooplankton communities were similar : i.e. abundance was greater in the subarctic (SA) region, biovolume was greater in the transitional (TR) region and slope of NBSS was moderate in TR. High biovolume and moderate NBSS slope in TR were caused by the dominance of late copepodid stages (C5) of Neocalanus copepods. While zooplankton fauna was similar through SA and TR (subarctic fauna), high temperature in TR could be accelerate copepod growth, and induce dominance of Neocalanus C5 there. Concerning east-west differences, zooplankton abundance and biovolume tended to be greater in the western transects. High zooplankton abundance and biovolume in the western regions would be caused by the east-west differences in primary productivity, which reported to be reflection of the east-west gradients in iron concentration.
Publisher ja 北海道大学大学院水産科学研究院
Date
    Issued2013-12-10
Language
  • jpn
Resource Type departmental bulletin paper
Version Type VoR
Identifier HDL http://hdl.handle.net/2115/53985
Journal
    • PISSN 1346-1842
    • NCID AA11547977
      • ja 北海道大学水産科学研究彙報
      • Volume Number63 Issue Number3 Page Start13 Page End22
File
    • fulltext p13-22.pdf
    • 1.47 MB (application/pdf)
      • Issued2013-12-10
Oaidate 2023-07-26