Study On The Community Characteristics Of Zooplankton Of Gaotang Lake In Huainan

Gaotang Lake is located in the east of Huai Nan, is a branch of huaihe in Huainan, and is natural store Water Lake. And has 4 km2 ponds lake region to the south of sluice. So the community characteristics of zooplankton were studied in order to find particularity of subsidence water area to others and provide scientific foundation to their sustainable development.The community zoology of zooplankton Gaotang Lake was studied from Apr. 2005 to Mar. 2006. The species and community diversity of zooplankton as well as relations of community to physico-chemical indices were analyzed, at the same time they were compared with that of Gaotang Lake. The results indicate:154 species of zooplankton was recorded (38 protozoan, 87 rotifer, 17 cladocera and 12 copepods). 90 and 80 species were recorded in summer and autumn, 40 in spring and 32 in winter, and species appearing all the year round were 19.Annual fluctuation of abundance and biomass was close in 3 locations. Abundance was 140 to 14280 ind/L and biomass from 0.233 to 39. Mg/L .That pelagian quantity and living things amounts years' time change law is: Animal quantity peak appears on month in 8, but amounts living things peaks appear on talent in 9 months. On the horizontal distribution, near the gate has a maximum in the average quantity per year , sampling points of water outlet and near the bank have the fewest; biomass is maxima in centre , nearby platform is the fewest; Scatter go ahead in the season, The Gaotang lake's zooplankton abundance and biomass have great difference in different season . The summer maximum, winter is minimal; autumn is maximal, winter is lowestThe Diversity exponent,Degree of homogeneity exponent and Species rich degree exponent in Gaotang lake are very high; The Advantage centrality exponent is lower. Both the zooplankton abundance and biomass are very rich; and Scatter comparatively homogeneously. So, Gaotang lake's water is still suitable to great majority animals' existing and reflected the water quality of Gaotang lake is comparatively well.Species of zooplankton increased along with temperature's rising, but correlation of species and pH and at biomass to chlorophyll a were unobvious. That of abundance in August, September and October and dissolved oxygen has obvious connection than them in others.In collectivity from Gaotang lake zooplankton abundance and biomass are higher, zooplankton' kind is richer, big particular animals are also more, whose water quality is that major animals suitable exist.