摘要
为探究山西省大同市册田水库浮游生物群落结构的季节差异及其功能群特征,分别于 2020 年 10 月12 日,以及 2021 年 3 月 27 日、6 月 21 日和 9 月 2 日共 4 个季节采样,对浮游生物功能群特征包括种类组成、生物量、密度、时空分布及其与水环境因子间的关系进行了分析.结果表明:本次调查共鉴定出浮游植物8 门63 属122 种,生物量、密度变化范围分别为7.31～45.69 mg/L和6 500.21～15 183.93 ind./L,浮游植物可划分为 30 个功能群,其中功能群N、J和W1 为代表性功能群;共鉴定出主要浮游动物 4 个类群13 属 21 种,生物量、密度变化范围分别为 1.49～25.53 mg/L和 2 128.90～17 699.72 ind./L,浮游动物可划分为 9 个功能群,其中RF、LCF为代表性功能群;秋、冬、春、夏 4 个季节的水质综合营养状态指数平均值分别为 53.45、40.19、52.66 和 48.87;4 个季节浮游植物和浮游动物的Shannon-Wiener多样性指数(H′)分别为0.80～1.54 和0.24～1.00,Pielou均匀度指数(J)分别为0.17～0.32 和0.08～0.32,Margalef丰富度指数(d)分别为 12.81～16.18 和 2.08～2.87,Simpson 优势度指数(D)分别为 0.40～0.77 和0.10～0.54;Pearson、Mental相关分析及冗余分析显示,温度、溶解氧、磷、氮和叶绿素a等是影响册田水库浮游生物群落结构的最重要因子.研究表明,册田水库浮游生物种类组成、功能群结构、生物量及密度在季节上存在显著性差异,册田水库水质处于重污染状态,建议放养以滤食浮游生物为主的鱼类.
Abstract
In order to evaluate the seasonal differences and functional group characteristics of plankton community structure in Cetian Reservoir in Shanxi Province,in the Haihe River,and contribute to reservoir protection and uti-lization,the characteristics of functional groups of plankton including species composition,biomass,density,spatial and temporal distribution,and their relationships with water environmental factors were investigated and analyzed in samples collected in Cetian Reservoir on October 12,2020(autumn),and March 27(winter),June 21(spring),and September 2(summer),2021.The results showed that 122 species of phytoplankton in 63 genera,8 phyla,were identified,biomass and density were ranged from 7.31 mg/L to 45.69 mg/L and from 6 500.21 ind./L to 15 183.93 ind./L,with 30 functional groups of phytoplankton,including representative functional groups N,J and W1.A total of 21 species of zooplankton in 13 genera including 4 groups were identified,with biomass ranging from 1.49 mg/L to 25.53 mg/L and density varying from 2 128.90 ind./L to 17 699.72 ind./L.The zooplankton was divided into 9 functional groups,with representative functional groups RF and LCF.The average values of compre-hensive trophic status index(TLI)were shown to be 53.45,40.19,52.66 and 48.87 in different seasons,with Shannon-Wiener diversity index(H′)of 0.80-1.54 and Pielou evenness index(J)of 0.17-0.32 in phytoplank-ton and 0.24-1.00 and 0.08-0.32 in zooplankton.There was Margalef index(d)of 12.81-16.18 in phyto-plankton and 2.08-2.87 in zooplankton.The Simpson dominance Index(D)was 0.40-0.77 in phytoplankton and 0.10-0.54 in zooplankton.Pearson correlation analysis,Mental correlation analysis and redundancy analysis(RDA)showed that temperature,and contents of dissolved oxygen,phosphorus,nitrogen and chlorophyll a were the most important factors affecting the plankton community structure in Cetian Reservoir.The significant seasonal differences in species composition,functional group structure,biomass and density of plankton were observed in Cetian Reservoir,indicating that the water quality of Cetian Reservoir was in a state of heavy pollution,and that fil-ter-feeding fishes are suggested to be stocked increasingly for control plankton population.
基金项目
山西省现代农业-鱼产技术体系(65721G0203010)
山西省水产研究所-山西农业大学横向项目(2020HX39)
维普
万方数据