Study on the Community Structure and Disturbance Status of River Benthic Animals in the Down Area of the Dianchi Lake Basin
The study of the structure and disturbance of benthic communities in the urban areas is instructive for the restoration of urban river ecosystem.Based on the data of the Dianchi Lake basin,the dominance index,biodiversity index and abundance/biomass comparison(ABC)curve in August 2021 were studied.The results showed that 39 species of benthic species were identified,belonging to 3 phyla and 5 classes,mainly arthropods,which accounted for 48.7%of the total species.The pollution indicator species such as Vermis(Limnodrilus sp.)and mosquito(Chironomus sp.)were the main dominant species.Diversity index analysis indicated that the overall biodiversity of the watershed was low,and the Shannon-Weaver diversity index and Margalef richness index were quite different in various points,while the Pielou uniformity index was less different at each point.ABC curve analysis showed that the interference degree of community structure in urban areas was generally moderate interference and presented certain spatial differences.Each river could be divided into three categories according to the degree of interference,namely undisturbed river,slightly disturbed river and moderate interference river,which accounted for 25.0%,66.7%and 8.3%,respectively.The results of this study would provide a scientific basis for the ecological protection of urban rivers in the Dianchi Lake basin.In the next step,relevant environmental data should be combined to deeply understand the relationship between each environment type and benthic community structure.
benthic animalsurban areadisturbance statusthe Dianchi Lake basin
万方数据
维普
