生态学报2018，Vol.38Issue(3)：991-1002,12.DOI:10.5846/stxb201612082529
太原汾河蓄水区浮游植物细胞密度及其与营养元素的关系
Relationship between the growth of phytoplankton and the distribution of nutrients in the Fenhe water storage area of Taiyuan
摘要
Abstract
Physicochemical factors and nutrients are important factors affecting aquatic ecosystems.Differences in physicochemical and nutrimental factors determine variation in phytoplankton community structure.Therefore,evaluation of water quality and nutrient status is necessary.Since 2015,we have studied the phytoplankton,and the physicochemical and nutrimental factors of the Fenhe water storage area.The results showed that (1) Cyanophyta and Chorophyta constituted the majority of the plankton community in the regions studied.Throughout the year,Cyanophyta was the most abundant phylum of planktonic algae.The dominant species,including Chroococcus minutus,Merismopedia tenuissima,Oscillatoria tenuis,and Microcystis aeruginosa,all of accounted for 42.95％ and 59.24％ of the algal community during the wet season and the dry season,respectively.Simultaneously,the concentration of chlorophyll-a revealed strong temporal and spatial variation in the Fenhe water storage area of Taiyuan,(annual mean:38.13mg/L;range:17.04-84.60mg/L).The chlorophyll-a concentration during the wet season was significantly higher than that in the dry season.During the wet season and the dry season,the spatial distribution patterns of chlorophyll-a were similar,increasing from upstream to downstream.(2) The water quality indicated eutrophication in the studied area.With rapid socio-economic development,increase in population and industrial enterprises,and urban-scale expansion,multiple test sites near the city center revealed that high levels of household-generated garbage,sewage,and industrial waste discharge into the Fenhe water storage area,owing to the lack of strict control measures.Total phosphorus and the other indicators were on the higher side,indicating that the water body is in mild or moderate eutrophic state (Chaicun Bridge,Shengli Bridge,Yingze Bridge,and Changfeng Bridge areas).In addition,at one point,some sites reached a severe eutrophic state (Nanneihuan Bridge,Jifen Bridge,Nanzhonghuan Bridge,and Jiuyuanshahe Bridge),which resulted the destruction of the ecological environment.(3) Chlorophyll is essential for photosynthesis.Measuring chlorophyll-a concentration could reflect the phytoplankton biomass and water quality status.The species composition of the phytoplankton community was closely correlated with chlorophyll-a content,dynamic variation of the physical and chemical index,and comprehensive index of water body.The correlation and principal components analyses revealed significant positive correlation of chlorophyll-a concentration with temperature,total nitrogen (TN),total phosphorus (TP),chemical oxygen demand (COD),and permanganate index (CODMn).Further,phosphorous might be a limiting factor,as indicated by its strong effect on phytoplankton abundance.关键词
太原汾河蓄水区/浮游植物/营养元素/相关性分析/主成分分析Key words
Fenhe water storage area/phytoplankton/nutrients/correlation analysis/principal components analysis引用本文复制引用
刘洋,吕俊平,刘琪,谢树莲,冯佳..太原汾河蓄水区浮游植物细胞密度及其与营养元素的关系[J].生态学报,2018,38(3):991-1002,12.基金项目
山西省社会发展科技攻关项目(201603D321001,201603D321008) （201603D321001,201603D321008）
