生态与农村环境学报2026，Vol.42Issue(5)：680-691,12.DOI:10.19741/j.issn.1673-4831.2025.0153
泄洪扰动下独流减河浮游植物群落演变及其与环境相关性研究
Evolution of Phytoplankton Community and Its Correlation with Environment in Duliujian River under Flood Discharge Disturbance
摘要
Abstract
This study investigated the phytoplankton community dynamics in response to the catastrophic"23.7"flood in the Haihe River Basin in 2023.Sampling was collected at three stations along the Duliujian River(32 samples in total)to analyze phytoplankton species composition,abundance,biomass,and diversity indices,coupled with measurements of physicochemical water parameters.The mechanisms through which the flood event influenced the phytoplankton community were elucidated.Results indicate that the number of phytoplankton species was significantly higher during the flood(102 species)than after the flood(85 species).Cyanophyta and Chlorophyta were the dominant groups,their ecological advan-tage being closely associated with elevated nutrient levels and adaptability to hydraulic disturbance.After the flood,mean total suspended solids(TSS)increased,nitrate nitrogen(NO3--N)concentrations rose significantly(P＜0.05),and dis-solved oxygen(DO)concentrations showed a significant negative correlation with TSS(P＜0.01).Redundancy analysis(RDA)revealed that during the flood,phytoplankton community structure was primarily driven by total phosphorus(TP),chlorophyll a(Chl-a),and ammonium nitrogen(NH4+-N)concentrations,whereas after the flood,total nitrogen(TN)and Chl-a became the key drivers.This shift reflects a temporary change in nutrient limitation induced by the flood discharge.A comprehensive water quality assessment indicate that the Duliujian River was in a moderately polluted(β-mesosaprobic)state.This study provides a scientific basis for the management and protection of riverine aquatic ecosys-tems and offers theoretical support for addressing the impacts of extreme hydrological events.关键词
泄洪/独流减河/浮游植物/环境因子Key words
flood discharge/Duliujian River/phytoplankton/environmental factor分类
资源环境引用本文复制引用
李爽,李伟波,高源,王茁龙,冀睿,乔之怡..泄洪扰动下独流减河浮游植物群落演变及其与环境相关性研究[J].生态与农村环境学报,2026,42(5):680-691,12.基金项目
天津市科学技术委员会生态环境治理科技重大专项(18ZXSZSF00080) （18ZXSZSF00080）
