Abstract: Seasonal variations in community structure of macrozoobenthos were investigated in collapsed lakes of Huaibei mining areas Liuqiao Lake and Linhuan Lake in September (autumn) and December (winter) of 2013, and in March (spring) and June (summer) of 2014. A total of 32 species belonging to 6 classes and 3 phylum were collected. The average densities were 210.956 ind/m2 in Liuqiao Lake and 181.65 ind/m2 in Linhuan Lake. The average biomass of macrozoobenthos were 60.55 g/m2 in Liuqiao Lake and 40.17 g/m2 in Linhuan Lake, respectively. The seasonal changes of Shannon－Weiner index (H′) and Margalef index (D) were same. The two indexes were all lowest in December, and higher in June and September. The seasonal change of Margalef index was more obvious (F(3, 16) > 3.95, P<0.05). The analyses of SIMPER and One-Way ANOSIM indicated that community structure of dominant species of macrozoobenthos was obviously different between Liuqiao Lake and Linhuan Lake.

Key words: macrozoobenthos, community structure, seasonal variation, collapsed lake