The assessment of river health using Benthic-Index of biotic integrity for Wenyu River Comparison of leaf decomposing rate in a headwater stream in Xiangxi River catchment Decomposition rates of two species of leaf litter at an oligotrophic pond in the southern China Bellamya sp. and its interaction with submerged macrophytes in Lake Taihu Eco-environmental quality assessment of Luoyuan Bay, Fujian Province of East China based on biotic indices. The breakdown of leaf litter in a stream impacted by acid mine drainage