Effect of sea-ice reduction on zooplankton in the Arctic Ocean

토픽 개요

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  • Prof. Matsuno's Laboratory of Marine Biology and Biodiversity, Division of Marine Bioresource and Environmental Science 포럼
  • Prof. Kohei Matsuno 웹페이지
  • About the copyright 웹페이지
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  Background

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  • Figure was provided by National Institute of Polar Research URL
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  Distribution of zooplankton

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  Northward shift of plankton community

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    • The stations were dividied into six groups (A-F), and northward shift was observed in 2007/2008.

    
    

    • In 2007, new group D was only seen with dominance of Pacific copepods.

    
    

    • This trend was also reported by another paper from longer observation.

    
    

  • [Open Access] Matsuno et al., 2011, Polar Biology URL
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  Plankton sampling and experiment on research vessel

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    • Fresh females were picked up from net sample.

    
    

    • The specimen was incubated at in-situ temperature (0ᵒC) on board, and the reproduced eggs were counted

    
    

    • The eggs were incubated until hatching.

    

    
    

    • Successful reproduction by pacific copepods were confirmed. 

    The number of eggs were similar to that of Pacific.

    • Hatching rate was very low at 7.5%, which is normally 90% in Pacific.

    
    

    • It could be caused by the unfertilized eggs were abundant in the reproduced eggs.

    
    

    • Because of that, establishment of the pacific copepods in Arctic is difficult so far.

  • [Open Access] Matsuno et al., 2015, Polar Biology URL