广西科学2026，Vol.33Issue(1)：91-103,13.DOI:10.13656/j.cnki.gxkx.20251230.001
禁渔初期长江上游保护区浮游植物群落结构及水生态健康评价
Community Structure of Planktonic Plants and Aquatic Ecosys-tem Health in the Protected Area of the Upper Reaches of the Yangtze River during the Early Period of Closed Fishing Season
摘要
Abstract
In order to study the phytoplankton community structure and the aquatic ecosystem health status in the protected area of the upper reaches of the Yangtze River,biological surveys were conducted in January 2023(dry season)and June 2023(wet season).The reference points and damage points were classified based on the Shannon-Werner index(H),and 26 representative biological indicators sensitive to environmental changes were used as candidate indicators for box plot testing and correlation analysis.A total of 92 species(including varieties)of phytoplankton were identified,belonging to 52 genera of 7 phyla.Among them,Bacil-lariophyta had the largest number of species(48 species of 18 genera),followed by Chlorophyta.The phyto-plankton community structure exhibited a Bacillariophyta-Chlorophyta-Cyanophyta pattern.The density of phytoplankton at each cross-section ranged from 6.45×104 cells/L to 1.29×105 cells/L,with an average val-ue of 8.76×104 cells/L.The average biomass ranged from 0.013 mg/L to 0.372 mg/L,with an average value of 0.135 mg/L.Finally,Shannon-Werner index,Margalef index(D),number of non-diatom units,diatom quotient,total phytoplankton biomass,and Cyanophyta biomass were selected to construct the Phytoplankton Index of Biotic Integrity(P-IBI)of the protected area in the Upper Reaches of the Yangtze River.The evalua-tion results show that the surveyed water area is in a"healthy-sub healthy"state,and the river's health per-formance is better during the dry season than during the wet season and in the upper reaches than in the low-er reaches.关键词
长江上游/保护区/浮游植物/群落结构/生物完整性指数(IBI)Key words
upper reaches of the Yangtze River/protected area/phytoplankton/community structure/Index of Biotic Integrity(IBI)分类
资源环境引用本文复制引用
马芊芊,李燕..禁渔初期长江上游保护区浮游植物群落结构及水生态健康评价[J].广西科学,2026,33(1):91-103,13.基金项目
长江上游珍稀特有鱼类国家级自然保护区重庆段2023年鱼类资源监测评价项目资助. （）
