太湖西山岛河网秋季浮游生物群落结构特征及其影响因子分析  

Characteristics and Influencing Factors of Plankton Community Structure During Autumn in Xishan Island Waterway Network of Taihu Lake

作　　者：李清濯 华跃洲 杜成栋 何尚卫 吴召仕[1] 潘继征[1,2] LI Qing-zhuo;HUA Yue-zhou;DU Cheng-dong;HE Shang-wei;WU Zhao-shi;PAN Ji-zheng(Nanjing Institute of Geography and Limnology/State Key Laboratory of Lake Science and Environment,Chinese Academy of Sciences,Nanjing 210008,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Environmental and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China)

机构地区：[1]中国科学院南京地理与湖泊研究所/湖泊与环境国家重点实验室,江苏南京210008 [2]中国科学院大学,北京100049 [3]苏州科技大学环境科学与工程学院,江苏苏州215009

出　　处：《生态与农村环境学报》2023年第2期214-226,共13页Journal of Ecology and Rural Environment

基　　金：国家自然科学基金(41001324);国家水体污染控制与治理科技重大专项(2017ZX07204005);江苏高校水处理技术与材料协同创新中心项目。

摘　　要：为了解太湖西山岛河网浮游生物群落结构特征及其影响因子,于2020年10—11月对西山岛河网34个采样点的浮游生物和环境因子进行调查分析,共鉴定出浮游植物56属68种,种类以绿藻(39.71%)为主,其次为硅藻(30.88%)和蓝藻(13.24%);浮游动物18属30种,种类以轮虫(76.67%)为主。浮游植物平均密度为1.32×10^(6)L^(-1),蓝藻占据绝对优势,浮游植物密度呈现城镇区河道>农业区河道>水产养殖区河道的规律;浮游动物平均密度为113.93 L^(-1),浮游动物密度呈现水产养殖区河道>城镇区河道>农业区河道的规律。冗余分析结果表明,氧化还原电位、化学需氧量、总氮和氨氮浓度是影响浮游植物群落结构的主要因子;水温、pH值、叶绿素a浓度、浮游植物密度和氨氮浓度是引起浮游动物群落变化的主要因子。To explore the characteristics of the plankton community in Xishan Island waterway network of Taihu Lake and its main influencing factors, 34 typical sampling points were investigated from October to November in 2020. The results show that a total of 68 species of phytoplankton belonging to 56 genera were identified. The main phyla was Chlorophyta(39.71%), followed by Bacillariophyta(30.88%) and Cyanophyta(13.24%). The average abundance of phytoplankton was 1.32×10^(6) L^(-1), and Cyanophyta was the dominant phyla. Waterways in urban areas had the highest phytoplankton abundance, followed by waterways in agricultural areas and aquaculture areas. Moreover, 30 species of zooplankton belonging to 18 genera were identified, with the dominating species as Rotifera(76.67%). The average abundance of zooplankton was 113.93 L^(-1). Waterways in aquaculture areas had the highest zooplankton abundance, followed by waterways in urban areas and agricultural areas. The redundancy analysis revealed that oxidation-reduction potential, chemical oxygen demand, total nitrogen and ammonia nitrogen concentration were the main factors affecting the phytoplankton community structure. While water temperature, pH value, chlorophyll-a concentration, phytoplankton abundance and ammonia nitrogen concentration were the primary influencing factors to the zooplankton community structure.

关 键 词：西山岛 浮游生物 群落结构 环境因子 冗余分析 

分 类 号：X524[环境科学与工程—环境工程]