Studies on the Meiofauna Community in Weishan Lake

A sampling meiobenthos were studied about Weishan lake in summer, 2009 (August). The results showed that the average meiobenthos abundance was 341±132 ind·10 cm-2, average biomass was 152.7±58.0 μg dwt·10 cm-2. In our study, five groups of small benthic organisms were identified. According to the abundance, free-living nematodes were the most dominant group, which dominance was 97.9%; Other groups followed according to priority were Copepoda, Ostracoda, Nauplii and Kinorhyncha. Distribution of meiobenthos was 61.1% in the 2~5 cm surface sediments, while nematodes in the 2~5 cm were 61.4%. Our studies could supply reference to the futher research on the small benthic communities, species composition, as well as the research on structure and function of freshwater benthic ecosystem .