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  • Effects of reduction of sewage effluent on periphytic diatom assemblage in a lotic system  [in Japanese]

    Fukushima Satoshi , Fukushima Hiroshi

    … Changes in the species composition in diatom assemblage with recovery of water quality were studied by long-term (1973-1993) monitoring of periphytic diatom in a small river flowing through an urban area. … The assemblage composition changed to ones dominated by other tolerant species such as <I>Nitzschia amphibia, Navicula gregaria</I> …

    Diatom 13(0), 93-103, 1997

    J-STAGE 

  • Diatom assemblages and sedimentary environments during the mid- to late-Holocene at the Mokoto site along the Okhotsk Sea in Hokkaido, Japan  [in Japanese]

    Sato Hiroshi , Ihira Masashi , Matsuda Isao , Kumano Shigeru

    Diatom assemblages in sediments were analyzed to clarify sedimentary environments during the mid- to late-Holocene and to determine the upper limit of marine facies at the Mokoto site along the Okhotsk Sea in Hokkaido.<BR>There was a replacement of marine and brackish-water diatoms by freshwater ones at +1.80 m altitude. … Marine and brackish-water diatoms occurred over 40 % at the horizons below +1.80 m altitude, where a marine diatom <I>Cocconeis scutellum</I> …

    Diatom 13(0), 193-199, 1997

    J-STAGE 

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