三峡库区神农溪浮游植物群落结构及优势种生态位变化研究OA
Phytoplankton community structure and ecological niche characteristics of dominant species in the Shennong River of the Three Gorges Reservoir
神农溪是三峡库区典型支流及引江济汉的重要水源区,其浮游植物群落结构动态变化对库区水质安全及生态调控具有重要指示作用.基于2023年不同季节水生态监测数据,分析了神农溪库湾浮游植物群落结构演替规律及优势种属关联性.结果显示:全年共鉴定浮游植物10门 73属,优势种属15属,群落呈绿藻-蓝藻-硅藻型结构;初秋水温较高,平均藻密度最高,硅藻门曲壳藻属和蓝藻门伪鱼腥藻属主导水华暴发;根据优势度和生态位宽度将优势种属划分为4个类群,角甲藻属可作为缓流分层水体水环境指示物种;不同种属生态位重叠值较高,表现为秋季>春季>夏季>冬季;群落结构年内变化以小环藻和隐藻为主导,冬春季节群落稳定性较弱,夏秋季节稳定性增强.本研究通过对优势种属生态位的变化进行分析,揭示了神农溪水华暴发的季节性规律,其优势藻属生态位分化特征可为三峡库区支流季节性水华预警提供理论依据,对库区水华趋势演变预测及分区防控策略制定具有重要指导意义.
The Shennong River serves as a representative tributary within the Three Gorges Reservoir and constitutes an essential water resource for the Yangtze-Hanjiang Water Transfer Project.The spatiotemporal fluctuations in the structure of phytoplankton communities are acknowledged as essential indicators for assessing water quality safety and informing ecological management practices.An examination of seasonal hydroecological monitoring data from 2023 was conducted to systematically analyze the succession patterns of phytoplankton community structure and the interspecific correlations among dominant genera within the Shennong River reservoir bay.The results showed that a total of 73 genera of phytoplankton,classified into 10 distinct phyla,were identified.Among these,15 genera were predominant,collectively representing a structural type characterized by chlorophyta,cyanobacteria,and bacillari-ophyta.The peak average density of algae was observed in early autumn,coinciding with increased water tempera-tures.During this period,the primary contributors to algal bloom events were identified as the diatom achnanthes and the cyanobacterium pseudanabaena.Dominant genera were classified into four ecological groups through dominance index and niche breadth analysis,with ceratopsia being proposed as a potential indicator species for slow-flowing stratified water bodies.High niche overlap values were observed across seasons,displaying a descending order of autumn>spring>summer>winter.Intra-annual community dynamics were demonstrated to be predominantly con-trolled by cyclotella and cryptomonas,with weaker community stability detected in winter-spring periods compared to enhanced stability in summer-autumn seasons.This study analyzed niche dynamics of dominant algal genera,uncov-ering seasonal cyanobacterial bloom patterns in Shennong Stream.The niche differentiation supports early warning systems for algal blooms in Three Gorges tributaries and informs predictive models and regional control strategies for reservoir ecosystems.
崔玉洁;张景禛;李松誉;郝玉淼;张平;苏青青
三峡库区生态环境教育部工程研究中心,三峡大学 湖北 宜昌 443002||三峡水库生态系统湖北省野外科学观测研究站,三峡大学 湖北 宜昌 443002三峡库区生态环境教育部工程研究中心,三峡大学 湖北 宜昌 443002||三峡水库生态系统湖北省野外科学观测研究站,三峡大学 湖北 宜昌 443002三峡库区生态环境教育部工程研究中心,三峡大学 湖北 宜昌 443002||三峡水库生态系统湖北省野外科学观测研究站,三峡大学 湖北 宜昌 443002三峡库区生态环境教育部工程研究中心,三峡大学 湖北 宜昌 443002||三峡水库生态系统湖北省野外科学观测研究站,三峡大学 湖北 宜昌 443002湖北省宜昌市水文水资源勘测局,湖北 宜昌 443003三峡库区生态环境教育部工程研究中心,三峡大学 湖北 宜昌 443002||三峡水库生态系统湖北省野外科学观测研究站,三峡大学 湖北 宜昌 443002
生物科学
三峡库区神农溪浮游植物优势种属生态位相关性分析
Three Gorges ReservoirShennong Riverphytoplanktonadvantageous speciesniche widthcorrela-tion analysis
《中国水利水电科学研究院学报（中英文）》 2026 (5)
624-635,680,13
国家自然科学基金项目(52009066,52409096,52379069,42477086)
评论