“…These are all the reflections of aquatic ecosystem deterioration. However, they cannot reflect the long-time change trend of the ecosystem, because of their quick response to environment change (Geček and Legović , 2001;Kü bar et al, 2005). Macroinvertebrates, as one important component of the aquatic ecosystem, living in the bottom of the water, have weak moving ability, and so have a relatively longer response time to environmental change (Berezina, 2000; Moreno and Callisto, 2006).…”