The community structure of benthic animals and water quality assessment in Taibo Lake

Abstract:

To describe the status of benthic animal communities and its spatial and temporal distribution in Taibo Lake, we surveyed quarterly the benthic animals in Taibo Lake from May 2013 to May 2014. 11 species of benthic animals belonging to 10 genera were collected in 7 sampling sites. Chironomus plumosus, Nephtys polybranchia and Limnodrilus hoffmeisteri were dominant species in Taibo Lake, accounting for 83.53% of total animal number. Density and species mumber of benthic animals changed significantly with seasons. The highest density of benthic animal appeared in Spring, and it was 1019.64 ind/m². Winter and Autumn were 437.5 ind/m² and 287.5 ind/m², Summer was 264.29 ind/m². The highest biomass appeared in Winter and Summer with 87.53 g/m² and 86.32 g/m². Autumn and Spring were 47.26 g/m² and 35.41 g/m².Diversity analysis indicated that some various index absolute values are low.There was significant difference in benthic animal number and species mumber that were collected in 7 sampling sites The results showed that the community structure of benthic animals was simple and the total species had obviously seasonal differences in Taibo Lake. The water eutrophication is serious.