| 淮河流域西淝河浮游植物群落结构特征 |
| Phytoplankton Community Structure in Xifei River of Huaihe River Basin |
| 投稿时间：2018-11-19 修订日期：2020-07-28 |
| DOI：10.15928/j.1674-3075.2020.04.011 |
| 中文关键词:西淝河 浮游植物 群落结构 生物多样性 |
| 英文关键词:Xifei River phytoplankton community structure biodiversity |
| 基金项目:安徽高校自然科学研究重大项目（KJ2015ZD05） |
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| 中文摘要: |
| 为探究淮河流域西淝河浮游植物群落结构特征以及与环境因子的关系，在 2016年和2017年冬季(2月)、春季(4月)、夏季(8月)和秋季(11月)对西淝河浮游植物群落结构进行研究。结果显示，共鉴定出浮游植物236种（含变种和变型），隶属于8门103属。其中，绿藻门最多，有37属、83种，占浮游植物物种总数的 35.17%；其次为硅藻门28属、78种，占 33.05%；蓝藻门20属、40种，占 16.95%。浮游植物群落结构组成及变化显示，蓝藻门物种的细胞密度占绝对优势，其次为绿藻门，分别占总细胞密度的57.04%、17.66%。硅藻门物种的相对生物量最大，其次为绿藻门物种，分别占总生物量的35.69 %和 28.81 %，且浮游植物细胞密度与生物量均在夏季达到最大值。浮游植物细胞密度为（7.24±1.13）×107 个/L，生物量年均值为（34.08 ±3.20）mg/L。Shannon-Wiener多样性指数、Margalef丰富度指数和Pielou均匀度指数为3.27～4.66、2.75～6.10和0.73～0.94。Pearson相关性与RDA分析表明，影响浮游植物群落结构的主要因子有溶解氧、水温、水生植被盖度、电导率、营养盐和透明度。研究结果可为揭示淮河流域浮游植物群落结构特征提供基础理论依据。 |
| 英文摘要: |
| Xifei River is an important tributary of Haihe River, with wide distribution and coverage of submerged aquatic plants. In this study, we investigated the community structure of phytoplankton and analyzed its relationship with environmental factors in Xifei River. The objectives were to identify key factors affecting spatial-temporal variations of phytoplankton community structure in Xifei River and provide theoretical evidence that reveals characteristics of phytoplankton community structure in Huaihe River Basin. The investigation was carried out at 8 sampling sites in the Lixin section of Xifei River in February (winter), April (spring), August (summer) and November (spring) of 2016 and 2017, focusing on phytoplankton species composition, spatial-temporal variation of phytoplankton density and biomass, community diversity and relevant environmental factors. Species diversity indices were used to analyze the community structure of phytoplankton in Xifei River. Pearson correlation analysis and redundancy analysis (RDA) were used to reveal the relationships between phytoplankton community structure and environmental factors. A total of 236 phytoplankton species (including varieties and variants) were identified, belonging to103 genera and 8 phyla. Chlorophyta (83 species, 37 genera) were dominant and accounted for 35.17% of the total phytoplankton species, followed by Bacillariophyta (78 species, 28 genera) and Cyanophyta (40 species, 20 genera), respectively accounting for 33.05% and 16.95% of the total species. The annual average phytoplankton density was (7.24±1.13)×107 cells/L in Xifei River, with absolute dominance by Cyanophyta and Chlorophyta species, accounting for 57.04% and 17.66% of the total cell density. The annual average phytoplankton biomass was (34.08±3.20) mg/L, with the relative higher biomass of diatom species and Chlorophyta species, accounting for 35.69% and 28.81% of the total biomass. Phytoplankton cell density and biomass both peaked in summer. The ranges of Shannon-Wiener diversity, Margalef richness and Pielou evenness indices of the phytoplankton community were, respectively, 3.27-4.66, 2.75-6.10 and 0.73 -0.94. Pearson correlation analysis and RDA analysis showed that DO, temperature, aquatic plant coverage, conductivity, TP, TN and water transparency were the primary factors affecting the phytoplankton community structure. |
| 张 珊,商乃萱,张金羽,刘爱华,周忠泽.2020.淮河流域西淝河浮游植物群落结构特征[J].水生态学杂志,41(4):81-89. |
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