2 Plankton community

Section outline

• Select section General

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  General

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  • Select activity Introduction of Yamaguchi's laboratory in Marine Biology and Biodiversity, Division of Marine Bioresource and Environmental Science

    

    Introduction of Yamaguchi's laboratory in Marine Biology and Biodiversity, Division of Marine Bioresource and Environmental Science กระดานเสวนา
  • Select activity Faculty introduction

    

    Faculty introduction Page
  • Select activity About obtaining references and their copyright

    

    About obtaining references and their copyright Page
  • Select activity Japanese

    

    Japanese URL
• Select section Plankton community

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  Plankton community

  • Select activity Study on Plankton Community from Surface to Deep S...

    Study on Plankton Community from Surface to Deep Sea in the Western North Pacific

    ～ Characteristics of Depth Distribution by Classification Group, Differences between Subarctic and Subtropical Zones ～

    
    

• Select section Plankton collection

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  Plankton collection

  • Select activity Collection pointsCollections were performed at fou...

    Collection points
    Collections were performed at four stationary points located in the subarctic to subtropical regions.

    
    
    

  • Select activity Plankton collection instrument page

    

    Plankton collection instrument page
• Select section Vertical distribution of plankton biomass by taxa

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  Vertical distribution of plankton biomass by taxa

  • Select activity The biomass of all taxa decreased with increasing ...

    
    

    The biomass of all taxa decreased with increasing water depth. The degree of decrease was greater for heterotrophic bacteria < unicellular animals < plants < multicellular animals.
    
    バイオマス：Biomass
    従属栄養性細菌：Heterotrophic bacteria
    単細胞生物：Unicellular organisms
    動物：Animals
    多細胞生物：Multicellular organisms
    

  • Select activity ［[Question] Why does the degree of reduction change for each group of organisms?

    

    ［[Question] Why does the degree of reduction change for each group of organisms? Page
  • Select activity [Question] Why does the biomass of multicellular animals continue to decrease in depth?

    

    [Question] Why does the biomass of multicellular animals continue to decrease in depth? Page
  • Select activity [Question] Why does it even exist in deep (dark)?

    

    [Question] Why does it even exist in deep (dark)? Page
• Select section Ratio of each taxa to plankton biomass

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  Ratio of each taxa to plankton biomass

  • Select activity Multicellular animals predominate in the subarctic...

    
    

    Multicellular animals predominate in the subarctic zone (A-C) and heterotrophic bacteria and unicellular animals predominate in the subtropical zone (D-F).

    各分類群の割合（％）：Percentage (%) of each taxonomic group

    水深（ｍ）：Depth (m)

    全プランクトンバイオマス（mgCm-3）:Total plankton biomass (mgCm-3)

    バイオマス：Biomass
    従属栄養性細菌：Heterotrophic bacteria
    単細胞生物：Unicellular organisms
    動物：Animals
    多細胞生物：Multicellular organisms
    

  • Select activity [Open Access] Yamaguchi et al., 2004, Journal of Oceanography

    

    [Open Access] Yamaguchi et al., 2004, Journal of Oceanography URL

    
    

    
    

  • Select activity [Question] Why do heterotrophic bacteria and unicellular animals prefer in the subtropical region?

    

    [Question] Why do heterotrophic bacteria and unicellular animals prefer in the subtropical region? Page
  • Select activity [Question] What is the reason for the small proportion of plants?

    

    [Question] What is the reason for the small proportion of plants? Page
• Select section Conclusion

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  Conclusion

  • Select activity Biomass was determined in all planktonic communiti...

    • Biomass was determined in all planktonic communities (plant-multicellular animals) ranging from surface to deep water (5800 m) at four stationary points located in the subarctic to subtropical regions of the North Pacific.

    
    

    • All plankton taxa showed a decrease in biomass with increasing depth, but the degree of decrease varied by taxon, in the order of heterotrophic bacteria < unicellular animals < plants < multicellular animals.

    
    

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  Next lecture

  • Select activity 3 copepods

    

    3 copepods URL

    This section introduces the representative zooplankton, caecilians.
    

• Select section 【Related Courses】

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  【Related Courses】