APPLICATION OF FORECASTING METHOD FOR BENTHIC COMMUNITY AFTER FLOOD IN AN ESTARINE TIDAL FLAT

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  • 河口干潟における洪水後の底生生物群集の予測方法の適用性について

Abstract

 The objective of this study is to clarify effects of changes in the physical characteristics of sediments after flood on macrobenthos using simple model easily forecasting benthic community structure in estuarine tidal flat at the Yoshino river mouth. We focused on physical characteristics of sediments such as silt clay contents and differences in elevation at the 50 stations. Prediction accuracy by sediment-benthic community model was low after flood, because the relationship between sediment group and benthic community did not correspond to that in a normal condition. However, prediction accuracy by sediment-benthic community model increased in the next year. These results indicated effects of flood on sediment and benthic community. Moreover, it was suggested silt clay affected benthic community rather than difference in elevation. It could evaluate the change of prediction accuracy and the characteristics of sediment group by the sediment-benthic community model.

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