In order to fully understand the phytoplankton community structure and biodiversity characteristics of Heli lake, three sampie surveys had been conducted, in May, July and September, in the year of 2016, with a total of 4 sections. The sampling had been done in the left, middle and right part respectively, along with different depth condition.The survey identified four phyla： Baeillariophyceae, Chlorophyta, Cyanophyta, Chrysophyte with 32 species and varieties, and the dominant species were diatom-green algae. The range of abundance is between 16.8× 10^4 ind/L - 166.8× 10^4 ind/L, and the biomass is between 0.33 mg/L - 2.73 mg/L. For the diversity indexes of Shannon-Wiener, Margalef and Pielou, the maximum average indexes all appeared in May, and the minimum aver- age indexes appeared in July. With more plants and less human affecting around the experiment location, Heli Lake, the water condi- tion there is considered as qualified, which is beneficial for the whole survey.
Chinese Journal of Fisheries