Spatial pattern of phytoplankton community diversity in Xijiang River at Anqing, Anhui Province
TAO Feng1, LIU Kai2, LIN Dan-qing2, ZHANG Jia-lu2, YOU Yang2
1.Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081，China; 2.Yangtze River Downstream Fisheries Resources and Environmental Science Observation Station, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China
Abstract: The phytoplankton community density and biomass were surveyed in five sampling sections and 15 sampling sites in the ex situ conservation area of the Xijiang River in Anqing in March (spring), June(summer), September (autumn)and December (winter) of 2017 to evaluate characteristics of phytoplankton community and water quality in Xijiang River. The results showed that a total of 104 species were identified, including 58 species of Chlorophyta, 19 species of Bacillariophyta, 14 species of Cyanobacteria, 4 species of Chrysophyceae, and 3 species of Cryptophyta, Euglena and Dinoflagellate, with seasonal differences in phytoplankton species, with the maximal species(73) in winter and the minimal species(48) in autumn. The variance analysis revealed that there were significant differences in phytoplankton density and biomass in the four seasons (P<0.05), with average phytoplankton density of 4.88×107cells/L and phytoplankton biomass of 12.11 mg/L, higher in autumn than those in the other seasons, and the seasonal significant differences in phytoplankton community structure. There were also large differences in the spatial pattern of phytoplankton, and the density and biomass were consistent with the concentration trend of TN, TP and NH3-N in spatial changes and environmental factors. The cyanobacterial density and biomass were dominated in different spatial and temporal patterns, and a total of 17 dominant species of phytoplankton species were found in different seasons in Xijiang River, with significant differences in different seasons. The evaluation of Carlson Nutritional Status Index indicated that the water quality in the Xijiang River was oligotrophic in the nutrient status of the water body. The qualitative evaluation revealed that the water quality was excellent. It was found that the phytoplankton community structure in the Xijiang oxbow the Yangtze finless porpoise ex situ Conservation area was stable and that the water quality was good, which is suitable for the survival and breeding of Yangtze finless porpoise. Redundancy analysis (RDA) indicated that the important environmental factors affecting the dynamic changes of phytoplankton community structure were pH, water temperature, DO, NH3-N and COD.
陶峰, 刘凯, 蔺丹清, 张家路, 尤洋. 安庆市西江浮游植物群落多样性时空格局[J]. 大连海洋大学学报, 2019, 34(2): 239-246.
TAO Feng, LIU Kai, LIN Dan-qing, ZHANG Jia-lu, YOU Yang. Spatial pattern of phytoplankton community diversity in Xijiang River at Anqing, Anhui Province. Journal of Dalian Ocean University, 2019, 34(2): 239-246.
张金勇, 高养春, Amir Shah Ruddin Md Sah, Aileen TAN Shau-Hwai, Norlaila Binti Mohd Zanuri, 李宏俊. 基于高通量测序和形态学鉴定的马来西亚马塘红树林区浮游动物多样性分析[J]. 大连海洋大学学报, 2021, 36(6): 910-919.
2019, Vol. 34 
