Estimation of the Effects of Al Hydrolysis Products on River Ecosystems Using Attached Algae as Bioindicator

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  • 付着藻類を指標としたアルミニウムの河川生態系への影響に関する基礎的研究

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The influence of Al hydrolysis products on the survival of attached algae in an acidic river was estimated by the bioassay using the diatoms (Nitschia palea and Achnanthes minutissima) as test algal materials. The bioassay was conducted under the pH conditions of 4.5 and 6.0 by culturing the test algal materials in two types of hydrolyzed Al solutions: one solution contained dissolved polymeric Al fraction (Al-b) with a high concentration and the other with a low concentration.<BR>In the bioassay using Nitschia palea under the both pH conditions, the chlorophyll a concentrations decreased rapidly in the solutions containing high concentrations of a polymeric Al fraction compared with those containing low concentrations. In the bioassays using Achnanthes minutissima under the pH condition of 6.0, the chlorophyll a concentrations decreased more rapidly in the solutions containing high concentrations of a polymeric Al fraction than in the other solutions.<BR>From the multi-regression analysis, it was confirmed that Al-b fraction inhibited distinctly the inhabitation of Nitschia palea under the pH conditions of 4.5 and 6.0 and Achnanthes minutissima under the pH condition of 6.0.

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Details 詳細情報について

  • CRID
    1390282679087744128
  • NII Article ID
    130003949547
  • DOI
    10.11532/proes1992.43.493
  • ISSN
    1884829X
    13415115
  • Text Lang
    ja
  • Article Type
    journal article
  • Data Source
    • JaLC
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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