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

doi:10.19741/j.issn.1673-4831.2021.0441

摘要/Abstract

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1.32×10⁶ 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。

关键词: 西山岛, 浮游生物, 群落结构, 环境因子, 冗余分析

Abstract: 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 1.32×10⁶ 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.

Key words: Xishan Island, plankton, community structure, environmental factors, redundancy analysis

中图分类号:

X524

李清濯, 华跃洲, 杜成栋, 何尚卫, 吴召仕, 潘继征. 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[J]. 生态与农村环境学报, 2023, 39(2): 214-226.

LI Qing-zhuo, HUA Yue-zhou, DU Cheng-dong, HE Shang-wei, WU Zhao-shi, PAN Ji-zheng. Characteristics and Influencing Factors of Plankton Community Structure During Autumn in Xishan Island Waterway Network of Taihu Lake[J]. Journal of Ecology and Rural Environment, 2023, 39(2): 214-226.

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