| 长湖草/藻型湖区浮游植物群落特征及与环境因子的关系 |
| Phytoplankton Community Structure and Its relationship with Environmental Factors in the Macrophyte and Algae Dominated Zones of Changhu Lake |
| 投稿时间：2022-02-23 修订日期：2022-04-01 |
| DOI：10.15928/j.1674-3075.202202230048 |
| 中文关键词:浮游植物 长湖 环境因子 草型湖区 藻型湖区 |
| 英文关键词:phytoplankton Changhu Lake environmental factors macrophyte dominated zone algae dominated zone |
| 基金项目:国家自然科学基金项目(41901135); 长江科学院开放基金项目(CKWV2019770/KY); 湖北省教育厅项目(Q20191303) |
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| 中文摘要: |
| 研究长湖草型湖区和藻型湖区浮游植物群落结构特征及其与环境因子的关系，为长湖草型湖泊生态系统的培植、水环境保护和生态修复提供理论支撑。根据长湖形态特征共设5个采样点，于2020年4、7、10月和2021年1月进行采样调查，测定水化学指标并鉴定浮游植物样品，通过对湖泊内草型湖区（水生植物为主）和藻型湖区（水生植物分布较少或无水生植物覆盖）浮游植物群落结构进行对比分析，探讨不同湖区浮游植物群落结构的差异及与其环境因子的关系。结果表明，草型湖区和藻型湖区分别鉴定出浮游植物80种和91种，以绿藻门种类数最多，分别为38种和50种。2类湖区均以小球藻属（Chlorella sp.）和小环藻属（Cyclotella sp.）为主要优势种。草型湖区和藻型湖区浮游植物丰度变化范围分别为0.59×107~2.34×107个/L和0.73×107~3.06×107 个/L，生物量变化范围分别为8.98~18.98mg/L和10.08~28.25 mg/L。藻型湖区多样性指数略高于草型湖区，两湖区水质整体介于轻污染到中污染。冗余分析（RDA）结果显示，草型湖区浮游植物优势种主要受水温、溶解氧、总氮、总磷和水位影响，藻型湖区主要受DO、TN、氮磷比和水位影响。 |
| 英文摘要: |
| Changhu Lake is the third largest freshwater lake in Hubei Province, and it is important for maintaining the ecological balance in the middle reaches of the Yangtze River. In this study, we examined the characteristics of the phytoplankton community structure in the macrophyte and algae dominated zones of Changhu Lake and explored the relationship of community structure with environmental factors. The aim of the study was to provide theoretical support for constructing a macrophyte-dominated lake ecosystem, protecting water quality and restoring the ecology of Changhu Lake. During April, July and October of 2020 and January of 2021, water samples were collected at five sites (T1, T2 and T4 in the algae dominated area; T3 and T5 in the macrophyte dominated area) in Changhu Lake for the determination of water environmental factors and phytoplankton counting and identification. Water temperature and dissolved oxygen were measured in situ. Results show that there were 80 and 91 phytoplankton species identified in macrophyte and algae dominated zones, respectively. Chlorophyta was dominant in both areas, with 38 and 50 species collected, respectively, in the macrophyte and algae zones and the dominant species were Chlorella and Cyclotella in both areas. Phytoplankton abundance in the macrophyte and algae dominated zones ranged from 0.59×107 to 2.34×107 cells/L and 0.73×107 to 3.06×107 cells/L, respectively, and the phytoplankton biomass ranges were 8.98 to 1898 mg/L and 10.08 to 28.25 mg/L. The diversity indices of the phytoplankton community in the algae zone was higher than in the macrophyte zone, and water quality in both zones was lightly to moderately polluted. Redundancy analysis (RDA) showed that the phytoplankton species dominating the macrophyte zone were primarily affected by water temperature (WT), dissolved oxygen (DO), total nitrogen (TN), total phosphorus (TP) and water level (WL), while phytoplankton species domination in the algae zone were primarily affected by DO, TN, TN/TP and WL. This study provides a scientific basis for monitoring and managing the Changhu Lake ecosystem. |
| 章叶飞,李 滔,张 露,胡 琴,刘章勇,杨 军.2024.长湖草/藻型湖区浮游植物群落特征及与环境因子的关系[J].水生态学杂志,45(2):102-110. |
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