Abstract:Abstract: A sampled investigation was conducted on the species composition and population density of planktonic algae in East Dongting Lake in 2013~2014 to explore the temporal and spatial patterns of community structure and species diversity. The results showed as follows: 1) A total of 159 planktonic algae species (including varieties) belonging to 8 phyla and 65 genera in East Dongting Lake were identified. The number of species and genera were higher than the previous studies, especially for the diatom species; 2) The mean density of the planktonic algae was 6.14×104 /L, and the average biomass was 0.20 mg/L. The density and biomass of planktonic algae obtained in this survey were relatively lower than the previous studies; 3) Sixteen dominant species were observed, such as Melosira varians, M. granulata, Cryptomonas erosa, etc., which showed a distinct seasonality; 4) The average Shannon-Weiner diversity index was 4.11, and the Margalef abundance index was 5.58. Both indices showed a similar seasonality as March>November>June>September, indicating a higher species diversity in dry seasons than in wet seasons. The average Pieou evenness index of planktonic algae was 0.63. The diversity index was lower at Baxianqiao and Bianshan, and is the highest at Jingjiangkou; 5) The planktonic algal community structures were similar at sampling sites on the east side of the investigated area, all of which were different from those on the west side of the Lake and the Xinqiang River. The dry seasons were also different from wet seasons in community structure.
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傅园园, 黄河仙, 张 琦, 罗岳平, 刘 雷, 陈贝贝, 胡树林, 刘应迪. 东洞庭湖浮游藻类群落的结构特征及物种多样性分析[J]. 生命科学研究, 2016, 20(1): 8-15.
FU Yuan-Yuan, HUANG He-Xian, ZHANG Qi, LUO Yue-Ping, LIU Lei, CHEN Bei-Bei, HU Shu-Lin, LIU Ying-Di. The Structure and Species Diversity of Planktonic Algae Community in East Dongting Lake. Life Science Research, 2016, 20(1): 8-15.