水生生物学报2026，Vol.50Issue(5)：187-199,13.DOI:10.3724/1000-3207.2025.2025.0410
南水北调东线调蓄水库浮游植物优势种生态位特征及种间联结性分析
NICHE CHARACTERISTICS AND INTERSPECIFIC ASSOCIATION ANALYSIS OF DOMINANT SPECIES OF PHYTOPLANKTON IN THE REGULATING RESERVOIR OF THE EASTERN ROUTE OF SOUTH-TO-NORTH WATER DIVERSION PROJECT
摘要
Abstract
This study investigated the phytoplankton community structure,dominant species'niche characteristics,and interspecific association in the Donghu Reservoir,Datun Reservoir,and Shuangwangcheng Reservoir along the Eas-tern Route of the South-to-North Water Diversion Project in Shandong Province.During the survey,8 phyla,59 genera,and 116 species of phytoplankton were identified,with Cyanophyta,Chlorophyta,and Bacillariophyta being the domi-nant groups.The phytoplankton communities in the reservoirs exhibited distinct seasonal succession patterns,that is,spring was characterized by a co-dominance of Bacillariophyta and Chrysophyta;Cyanophyta was absolutely dominant in summer and autumn,with harmful bloom-forming cyanobacteria such as Microcystis spp,Pseudoanabaena limne-tica,and Cylindrospermopsis raciborskii were the dominant species;while Cyanophyta and Bacillariophyta were co-dominant phylum,with abundance of Pseudoanabaena limnetica reaching as high as 7.17×106 cells/L.Niche analysis revealed that the average niche width(Bi)of dominant species in Cyanophyta increased by 77.3%and 34.0%in summer and autumn,respectively,indicating significant expansion during these seasons.Seasonal changes in niche overlap(ΔSOij)showed that Chlorophyta and Bacillariophyta were in developmental stages in spring,while the niche overlap of Cyanophyta continued to rise to 77.8%in summer and autumn,but the resource competitiveness of Cyanophyta gradua-lly declined in autumn.Interspecific association analysis revealed that there was an overall non-significant negative association in spring and summer,and a significant positive association between the Cyanophyta and Chlorophyta in autumn,reflecting the functional complementarity and niche differentiation among these species.Among the 924 domi-nant species pairs,57.47%showed significant association,with as many as 506 pairs having extremely significant nega-tive associations,indicating that the community as a whole was in a state of intense competition.Based on these find-ings,it is recommended to incorporate positively associated species pairs with high niche overlap as water bloom early warning indicators into the risk management system,providing a scientific basis for ensuring drinking water safety.关键词
南水北调东线工程/调蓄水库/浮游植物/生态位/种间联结性Key words
The Eastern Route of South-to-North Water Diversion Project/Regulating reservoir/Phytoplankton/Ecological niche/Interspecific association分类
生物科学引用本文复制引用
余晓晴,敖子强,陈沁怡,汤一帆,王景龙,李敦海,汪志聪..南水北调东线调蓄水库浮游植物优势种生态位特征及种间联结性分析[J].水生生物学报,2026,50(5):187-199,13.基金项目
国家重点研发计划重点专项(2023YFC3207802)资助Supported by the National Key R&D Program of China(2023YFC3207802) （2023YFC3207802）
