Hardness of marine bottom sediment as a good proxy for habitat of benthic animal

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  • Kajihara Naoto
    National Research Institute of Fisheries and Environment of Inland Sea

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  • 底生生物の生息環境指標としての底質の硬度
  • テイセイ セイブツ ノ セイソク カンキョウ シヒョウ ト シテ ノ テイシツ ノ コウド

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Abstract

<p>Characteristics of the bottom sediments are important factors to burrowing benthic animals. However, particle size and deposition pattern of bottom sediments, the typical indices of the bottom sediments, had been hardly applicable to the analysis of their habitat in the muddy bottom area and shoreline of sandy beach. In recent years, hardness index, a good proxy for the evaluation of the sediment characteristics, has been developed and the successful results have been reported. The purpose of this article is to introduce the methods of measurement for hardness indices at bottom sediments and the relevant physical property indices, including suction, saturation level, saturation percentage and cohesion, and to provide better understanding basic principles behind them. Finally, future development of the research by utilizing hardness indices and the possible new indices to evaluate habitat are examined.</p>

Journal

  • Oceanography in Japan

    Oceanography in Japan 22 (5), 147-158, 2013-09-15

    The Oceanographic Society of Japan

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