| 引用本文: | 尹 娟,董军林,邱小琮,等.照壁山水库浮游生物群落结构特征及其驱动因素研究[J].灌溉排水学报,2026,45(6):1-9. |
| YIN Juan,DONG Junlin,QIU Xiaocong,et al.照壁山水库浮游生物群落结构特征及其驱动因素研究[J].灌溉排水学报,2026,45(6):1-9. |
|
| 摘要: |
| 【目的】干旱和半干旱地区的水库生态系统对水文波动和营养盐输入高度敏感。浮游生物是水质的重要指示生物，但其群落构建与环境驱动力的关联尚不明确。本研究旨在探究宁夏照壁山水库浮游生物群落的结构特征与关键水环境因子的相互关系。【方法】基于2023年春、夏、秋季的3次野外采样调查，采用Pearson相关性分析、Mantel检验和冗余分析（RDA）定量分析浮游生物—水环境因子的相互作用。【结果】共鉴定出浮游植物7门27种属。浮游植物密度呈显著的季节性波动，夏季达到峰值（62.75×104 ind./L），其中绿藻（40.74%）和硅藻（29.63%）为优势类群。浮游动物13种，平均密度为130.17×104 ind./L，呈秋季>春季>夏季的趋势。轮虫类在丰度上占优势（54.61%），而桡足类生物量最高（63.83%），表明浮游动物群落存在从小型轮虫类到大型桡足类和枝角类的明显演替。冗余分析（RDA）结果显示，环境因素分别解释了浮游植物和浮游动物群落总变异的71.86%和64.22%。【结论】照壁山水库浮游生物群落具有显著的时空异质性和生态功能分化，亚硝酸盐（NO2-）和总氮（TN）是引发夏季浮游植物水华的主要驱动因素，而溶解氧（DO）和高锰酸盐指数（CODMn）则显著调控浮游动物的分布格局和功能群更替。本研究为干旱半干旱地区水库生态评价与水质调控提供了理论支撑与方法参考。 |
| 关键词: 照壁山水库；浮游生物群落；驱动因素；干旱半干旱地区 |
| DOI：10.13522/j.cnki.ggps.2026066 |
| 分类号: |
| 基金项目: |
|
| Plankton community structure and environmental drivers in Zhaobishan Res-ervoir |
|
YIN Juan, DONG Junlin, QIU Xiaocong, WANG Chuyou
|
|
1. School of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China;
2. School of Life Sciences, Ningxia University, Yinchuan 750021, China;
3. Shanxi Provincial Geological Survey Institute Co., LTD., Taiyuan 030006, China
|
| Abstract: |
| 【Objective】Reservoir ecosystems in arid and semi-arid regions are highly sensitive to hydrological variability and nutrient loading. As key biological indicators of water quality, plankton communities reflect ecosystem responses to environmental change; however, the mechanisms underlying their assembly and environmental relationships remain insufficiently understood. This study aimed to characterize plankton community structure and elucidate its relationships with key water environmental factors in Zhaobishan Reservoir, Ningxia, China.【Method】Three field surveys were conducted in spring, summer, and autumn of 2023. Pearson correlation analysis, Mantel tests, and redundancy analysis (RDA) were applied to quantitatively assess the relationships between plankton communities and environmental factors.【Results】A total of 27 phytoplankton taxa belonging to 7 phyla were identified. Phytoplankton density exhibited significant seasonal variation, reaching a maximum in summer (62.75 × 104 ind./L), with Chlorophyta (40.74%) and Bacillariophyta (29.63%) as dominant groups. Thirteen zooplankton species were recorded, with an average density of 130.17 × 104 ind./L and a seasonal pattern of autumn ＞ spring ＞ summer. Rotifers dominated zooplankton abundance (54.61%), whereas copepods contributed the highest biomass (63.83%), indicating a clear community succession from small-sized rotifers to larger copepods and cladocerans. RDA results showed that environmental factors explained 71.86% and 64.22% of the variation in phytoplankton and zooplankton communities, respectively.【Conclusion】Plankton communities in Zhaobishan Reservoir exhibit pronounced spatiotemporal heterogeneity and ecological functional differentiation. Nitrite and total nitrogen were identified as the primary drivers of summer phytoplankton blooms, while dissolved oxygen and permanganate index significantly influenced zooplankton distribution patterns and community succession. These findings provide theoretical support and methodological reference for ecological assessment and water quality management of reservoirs in arid and semi-arid regions. |
| Key words: Zhaobishan Reservoir; plankton community; driving factors; arid and semi-arid regions |
