Reduction of Eisenia bicyclis bed by a grazer Strongylocentrotus nudus off Oshika Peninsula: as an example of urchin barren in Northeastern coast of Honsu, Japan
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Reduction of Eisenia bicyclis bed by a grazer Strongylocentrotus nudus off Oshika Peninsula: as an example of urchin barren in Northeastern coast of Honsu, Japan