Community structure of chironomid larvae and relationship with environmental factors from lakes in Hanyang, Wuhan
To understand the community structure and diversity of chironomid larvae and relationship with eutrophication in the lakes of Hanyang, Wuhan, China, a seasonal survey on chironomid larvae and environmental variables was conducted in five lakes ( Houguan Lake, Sanjiao Lake, Nantaizi Lake, Moshui Lake and Longyang Lake) during 2011-2012. Alto-gether 6 species, 6 genera of chironomid larvae were collected from the five lakes in Hanyang. Tanypus chinensis dominated the community of chironomid larvae in the five lakes, with the dominance ranging from 26. 8% to 86. 4%. The annual aver-age density of chironomid larvae was (748 ± 162) ind. /m2, and the annual average biomass was (2. 77 ± 0. 98) g/m2. The highest average density (171 ± 32) ind. /m2 and biomass (0. 32 ± 0. 12) g/m2 occurred in Houguan Lake, while the lowest values occurred in Longyang Lake [(1066 ± 468) ind. /m2 and (5. 37 ± 2. 48) g/m2] . The peak of densi-ty and biomass was observed in January. Average Margalef index ( dM ) and Shannon-Wiener index ( H′) of the communi-ty of chironomid larvae from the five lakes in Hanyang were 0. 38 ± 0. 05 and 0. 72 ± 0. 12, respectively. The highest di-versity (dM =0. 58 ± 0. 12, H′=1. 03 ± 0. 19) occurred in Hougan Lake, and the lowest diversity (dM = 0. 28 ± 0. 14, H′=0. 38 ± 0. 13) occurred in Nantaizi Lake. Significantly positive relationships were found between density/bio-mass and total nitrogen, ammonia nitrogen, total phosphorous and chlorophylla. Redundancy analysis ( RDA) revealed that transparency of water ( SD) and total nitrogen ( TN) were the key environmental variables effecting the composition of chi-ronomid larva community. It is concluded that dominant species, density, biomass and diversity index of chironomid larvae are good indicators for water quality of the lakes in Hanyang.
NETL
NSTL
万方数据
维普
