2 Plankton community

토픽 개요

• 공통

  모두 접기 모두 펼치기
  • 

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

    Faculty introduction 웹페이지
  • 

    About obtaining references and their copyright 웹페이지
  • 

    Japanese URL

• Plankton community
  • 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 ～

    
    

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

    
    
    

  • 

    Plankton collection instrument page 웹페이지

• Vertical distribution of plankton biomass by taxa
  • 
    

    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
    

  • 

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

    [Question] Why does the biomass of multicellular animals continue to decrease in depth? 웹페이지
  • 

    [Question] Why does it even exist in deep (dark)? 웹페이지

• Ratio of each taxa to plankton biomass
  • 
    

    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
    

  • 

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

    
    

    
    

  • 

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

    [Question] What is the reason for the small proportion of plants? 웹페이지

• Conclusion
  • • 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.

    
    

• Next lecture
  • 

    3 copepods URL

    This section introduces the representative zooplankton, caecilians.
    

• 【Related Courses】