Chromatium sp.の浮遊密度:その貝池H<SUB>2</SUB>S層上端でのブルーム形成におよぼす影響

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タイトル別名
  • Buoyant Density of Chromatium Sp.: Its Effect on the Blooming at an Upper Boundary of the H<SUB>2</SUB>S Layer in Lake Kaiike

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説明

Two kinds of motile large-celled bacteria, Chromatium sp. and Macromonas sp., form steady-state dense populations at the upper boundary of the H2S layer in Lake Kaiike. Buoyant density of Chromatium sp. estimated as about 1.26g⋅cm-3 was considerably higher than that of the habitat. Cells of Chromatium sp. killed with formalin settled at a rate of about 0.8 cm⋅hr-1. Living cells rapidly moved towards an upper light source when the number was lower than 106 cells⋅ml-1. However, when the number reached to a level of 2-5x106 cells⋅ml-1, further upward movement was not observed. Number of Chromatium sp. at the upper boundary of the H2S layer, 105-106 cells⋅ml-1, was considered to approximate the maximum level attainable at the boundary: above this number the bacterium seems unable to find swimming space sufficient to respond to tactic stimulus due to the excess crowding.

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詳細情報 詳細情報について

  • CRID
    1390001204062954112
  • NII論文ID
    130003644868
  • DOI
    10.3739/rikusui.52.57
  • ISSN
    18824897
    00215104
    http://id.crossref.org/issn/14398621
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
    • Crossref
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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