中国水利水电科学研究院学报（中英文）2026，Vol.24Issue(5)：624-635,680,13.DOI:10.13244/j.cnki.jiwhr.20250057
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
Phytoplankton community structure and ecological niche characteristics of dominant species in the Shennong River of the Three Gorges Reservoir
摘要
Abstract
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.关键词
三峡库区/神农溪/浮游植物/优势种属/生态位/相关性分析Key words
Three Gorges Reservoir/Shennong River/phytoplankton/advantageous species/niche width/correla-tion analysis分类
生物科学引用本文复制引用
崔玉洁,张景禛,李松誉,郝玉淼,张平,苏青青..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[J].中国水利水电科学研究院学报（中英文）,2026,24(5):624-635,680,13.基金项目
国家自然科学基金项目(52009066,52409096,52379069,42477086) （52009066,52409096,52379069,42477086）
