[赫迪水库不同生境浮游植物群落的结构特征及其与环境因素的关系]。

Q2 Environmental Science Huanjing Kexue/Environmental Science Pub Date : 2024-10-08 DOI:10.13227/j.hjkx.202311178
Rui-Xin Sun, Li Xu, Rong-Chang Liang, Qi-Jia Cai, Qian-Li Ma, Zheng-Yan Geng, Xing-Zhou Lin, Yu-Yin Yang, Ling-Ai Yao, Rui Zhao
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引用次数: 0

摘要

为探讨鹤地水库不同生境浮游植物群落的特征及其与环境因子的关系,我们对鹤地水库的入库河流、河口和库区进行了调查,调查时间分别为 2022 年 2 月(退水期)、4 月(汛期)、7 月(汛期)和 12 月(退水期)。2022 年。调查期间,共鉴定出 7 个门 231 种浮游植物,浮游植物细胞密度范围为 2.94 × 106 - 8.04 × 108 cells-L-1。洪水期浮游植物细胞密度高于衰退期,河口和库区高于入库河流。同时,河口区和库区的浮游植物细胞密度全年以蓝藻为主,尤其是 Raphidiopsis raciborskii,而流入河的浮游植物细胞密度则以蓝藻纲、绿藻纲和枯草纲为主。在流入河段,蓝藻的优势种为铜绿微囊藻、褐藻、环状假单胞藻和点状蓝藻;叶绿藻的优势种为普通小球藻和四叶鲫藻;芽胞藻的优势种为普通小球藻和颗粒藻。生物多样性(Shannon-Wiener 指数、Pielou 指数和 Margalef 指数)最高的区域是流入河区域。最高。相关分析(Pearson)表明,与浮游植物群落显著相关的环境因子包括水温、溶解氧、pH 值、电导率、氮和磷浓度。RDA 分析表明,流入河区的浮游植物群落主要受 pH 值和总氮浓度的影响,河口区的浮游植物群落主要受水温和 pH 值的影响,水库区的浮游植物群落主要受浊度和 pH 值的影响。pH 值对三种不同生境的浮游植物群落变化都有影响,而流入河区受总氮浓度的影响较大,河口区和水库分别受水温和浑浊度的影响较大。
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[Structural Characteristics of Phytoplankton Communities and Its Relationship with Environmental Factors in Different Habitats of Hedi Reservoir].

To explore the characteristics of phytoplankton communities and their relationship with environmental factors in different habitats of Hedi Reservoir, the inflow rivers, estuaries, and reservoir area of Hedi Reservoir were investigated in February (recession period), April (flood period), July (flood period), and December (recession period) of 2022. During the investigation, 231 species of phytoplankton that belong to seven phyla were identified, and the cell density of phytoplankton ranged from 2.94 × 106 - 8.04 × 108 cells·L-1. Phytoplankton cell density in flood periods were higher than that in recession periods, and that was higher in estuaries and the reservoir area than that in inflow rivers. Meanwhile, the cell density of phytoplankton in the estuarine and reservoir area was dominated by Cyanobacteria throughout the year, especially Raphidiopsis raciborskii, whereas the cell density of phytoplankton in inflow rivers was dominated by Cyanophyta, Chlorophyta, and Bacillariophyta. In the inflow river area, the dominant species of cyanobacteria were Microcystis aeruginosa, Limnothrix redekei, Pseudanabaena circinalis, and Merismopedia punctata; the dominant species of Chlorophyta were Chlorella vulgaris and Crucigenia tetrapedia; and the dominant species of Bacillariophyta were Chlorella vulgaris and Melosira granulate. The highest biodiversity (Shannon-Wiener Index, Pielou index, and Margalef index) were observed in the inflow river area of Hedi Reservoir. The correlation analysis (Pearson) indicated that the environmental factors that were significantly correlated to phytoplankton communities included water temperature, dissolved oxygen, pH, conductivity, nitrogen, and phosphorus concentration. The RDA analysis indicated that phytoplankton communities in the inflow river area were mainly affected by pH and total nitrogen concentration, which were majorly affected by water temperature and pH in the estuarine area and chiefly affected by turbidity and pH in the reservoir. The pH affected the changes in phytoplankton communities in all three different habitats, whereas the inflow river area was significantly affected by total nitrogen concentration, and the estuarine and reservoir were significantly affected by water temperature and turbidity, respectively.

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Huanjing Kexue/Environmental Science
Huanjing Kexue/Environmental Science Environmental Science-Environmental Science (all)
CiteScore
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15329
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