Effect of Sediment Treatment Strength on Bio-diversity in Experimental Mesocosm System

Abstract

Investigation of effect of sediment treatment strength on bio-diversity was conducted using experimental mesocosm system. As results, it was made clear that 1) sediment treatment introduced trophic state succession and the eutrophic state changed to the oligotrophic state under strong treatment, 2) sediment treatment introduced bio-diversity succession and the diversity decreased under too strong treatment, 3) sediment treatment introduced ecosystem structure succession and the structure changed largely under strong treatment. From the experiment in this study, environmental assessment on ecosystem structure should be necessity with the optimum treatment method selection.