Abstract
In this study, ecological influence assessment, using Propsilocerus akamusi as biotic indicator, of shell fragment as sediment improvement meterial of regional unused resources was conducted. Survival rate of Propsilocerus akamusi were 100% in unsprinkled system (control), 73.7% in 10g/m2, 61.9% in 50g/m2, 52.4% in 100g/m2, 52.4% in 150g/m2 and 52.4% in 200g/m2 in unburnt treatment system, and 68.4% in 10g/m2, 61.9% in 50g/m2, 47.6% in 100g/m2, 38.1% in 150g/m2 and 28.6% in 200g/m2 in burnt treatment system. LC50 (50% Lethal Concentration: median lethal concentration) were estimated as 199g/m2 in unburnt treatment system and 97g/m2 in burnt treatment system, respectively. The optimal application rate of shells as regional unused resources for balancing ecosystem conservation and water quality improvement was estimated to be 100g/m2 burned system. Influence of shell sprinkling using multi species including system considering of food chain should be investigated in future study.
