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East—west comparison of the zooplankton community in the subarctic Pacific during summers of 2003―2006

SAITO, Rui ; YAMAGUCHI, Atsushi ; SAITOH, Sei-Ichi ; KUMA, Kenshi ; IMAI, Ichiro

Journal of plankton research, 2011-01, Vol.33 (1), p.145-160 [Periódico revisado por pares]

Oxford: Oxford University Press

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  • Título:
    East—west comparison of the zooplankton community in the subarctic Pacific during summers of 2003―2006
  • Autor: SAITO, Rui ; YAMAGUCHI, Atsushi ; SAITOH, Sei-Ichi ; KUMA, Kenshi ; IMAI, Ichiro
  • Assuntos: Animal and plant ecology ; Animal, plant and microbial ecology ; Biological and medical sciences ; Copepoda ; Crustacea ; Fundamental and applied biological sciences. Psychology ; General aspects ; Invertebrates ; Synecology
  • É parte de: Journal of plankton research, 2011-01, Vol.33 (1), p.145-160
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
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  • Descrição: The subarctic Pacific is known to have east-west gradients in the oceanic environment and phytoplankton community. The western subarctic Pacific is characterized by low temperature and high chlorophyll a (Chl a) while the eastern region by high temperature and low Chl a. Although there is little information on the differences in the zooplankton community between the eastern and western subarctic Pacific, the gradients in the oceanographic environment and phytoplankton community may markedly affect the zooplankton community in this region. The aim of this study is to clarify east-west differences in the subarctic Pacific zooplankton community. Zooplankton were sampled at stations along the 165 degree E line (western subarctic Pacific from 41 degree 30'N to 49 degree 30'N) and 165 degree W line (eastern subarctic Pacific from 39 degree N to 53 degree 30'N) using 335 and 100 mu m mesh size Twin NORPAC net during the summers of 2003-2006. East-west differences in the zooplankton community were characterized as: (i) greater total zooplankton abundance in the west and (ii) larger body size of calanoid copepods of the same copepodid stage in the west. Differences in east-west zooplankton abundances are attributed to differences in the magnitude of primary production (high in the west) and the size of primary producers (large in the west). Larger body sizes of calanoid copepods in the west are attributed to the lower temperature. Thus, differences in zooplankton abundance and body size are concluded to be due to east-west gradients in the oceanographic environment and phytoplankton community.
  • Editor: Oxford: Oxford University Press
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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