Spatio-temporal pattern and influencing factors of phytoplankton community structure in National Aquatic Germplasm Resources Reserve of common carp Cyprinus carpio and longsnout catfish Leiocassis longirostris in Huaihe River
WANG Dongwei, GONG Jiang, YANG Xiaoxi, ZHAO Wei, ZHOU Yanfeng*
1.Wuxi Fishery College, Nanjing Agricultural University, Wuxi 214081, China; 2.Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Changjiang River, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; 3.Huaiyuan County Agricultural Comprehensive Administrative Law Enforcement Brigade, Bengbu 233499, China
Abstract: In order to understand the spatio-temporal pattern of phytoplankton community structure and its relationship with environmental factors in common carp Cyprinuscarpio and longsnout catfish Leiocassislongirostris National Aquatic Germplasm Resource Reserve in the Huaihe River (117°05′39″-117°15′31″E, 32°47′59″-33°00′03″N), phytoplankton and water quality were seasonally investigated in 18 sampling sites in the reserve in winter (January), spring (April), summer (August) and autumn (October) 2020.The results showed that 143 species of phytoplankton in 71 genera in 8 phyla, mainly Cyanophyta, Bacillariophyta and Chlorophyta, accounting for 85.31% in total, were identified in the reserve during the survey period. The dominant species of phytoplankton were mainly Cyclotellameneghiniana, Chroomonasacuta and other 13 species. The variation of Shannon-Wiener diversity index of phytoplankton in the reserve was ranged from 1.48 to 3.08, with significantly lower diversity index in spring and winter than that in summer and autumn (P<0.05); Pielou evenness index was ranged from 0.46 to 0.96, without significant seasonal difference (P>0.05). The range of Margalef richness index was varied from 0.48 to 2.58, significantly lower in winter than in the other three seasons, with the maximum in summer and the minimum in winter. The phytoplankton cell density in the reserve was ranged from 9.84×104 to 7.86×107 cells/L, and the variation range of biomass was varied from 0.02 to 29.07 mg/L. There was no significant difference in phytoplankton density and biomass in seasons, but significant difference in the waters of Guohe River, higher than that in the main stream of Huaihe River (P<0.05). The main environmental factors affecting the spatio-temporal distribution of phytoplankton communities in the reserve were transparency (SD), total nitrogen (TN), water depth (WD) and permanganate index (CODMn) in spring, summer, autumn and winter, respectively. It was found that the watersheds in the reserve were all in a state of mild eutrophication, without significant difference in the phytoplankton density and biomass in time pattern, significantly higher in the Guohe River than that in the main stream of the Huaihe River. It is suggested that the corresponding environmental factors should be paid attention in different seasons to maintain the diversity of phytoplankton.
王东伟, 龚江, 杨晓曦, 赵伟, 周彦锋. 淮河荆涂峡鲤、 长吻鮠国家级水产种质资源保护区浮游植物群落结构的时空格局及影响因子[J]. 大连海洋大学学报, 2022, 37(4): 658-667.
WANG Dongwei, GONG Jiang, YANG Xiaoxi, ZHAO Wei, ZHOU Yanfeng. Spatio-temporal pattern and influencing factors of phytoplankton community structure in National Aquatic Germplasm Resources Reserve of common carp Cyprinus carpio and longsnout catfish Leiocassis longirostris in Huaihe River. Journal of Dalian Ocean University, 2022, 37(4): 658-667.
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.
2022, Vol. 37 
