三峡水库4条支流的浮游植物生物量及其与环境因子的关系  

Phytoplankton biomass and its relationship with environmental factors infour tributaries of the Three Gorges Reservoir

作　　者：方灵超 李渊 毕永红[1] FANG Lingchao;LI Yuan;BI Yonghong(State Key Laboratory of Fresh Water Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences,Wuhan 430072,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院水生生物研究所,淡水生态与生物技术国家重点实验室,武汉430072 [2]中国科学院大学,北京100049

出　　处：《生态科学》2023年第6期44-50,共7页Ecological Science

基　　金：国家自然科学基金面上项目(31971477)。

摘　　要：为了探究三峡支流水域浮游植物生物量的时空变化及其与环境因子的关系,于2019年1月到2020年1月在4条支流(小江、大宁河、神农溪、香溪河)开展水体叶绿素a和理化指标的逐月同步调查监测。结果显示,叶绿素a浓度在5月最高(29.802±19.970μg·L^(–1));1月最低(1.562±0.362μg·L^(–1)),叶绿素a年平均浓度为(10.810±10.908)μg·L^(–1)。空间上,重庆水域高于湖北水域,小江叶绿素a浓度最高。叶绿素a与理化因子的相关性分析和多元逐步回归分析结果表明,叶绿素a与总磷、溶氧、COD_(Mn)和水温存在显著正相关关系(P<0.05),与磷酸盐和透明度呈显著负相关关系(P<0.05);研究确认磷是三峡水库支流浮游植物生物量的主要控制因子,控磷对三峡支流藻类水华防控具有重要意义。To reveal the relationship between phytoplankton biomass and environmental factors in tributaries of the Three Gorges Reservoir(TGR),chlorophyll a(Chl a)and physico-chemical factors of four tributaries(Xiaojiang,Daning,Shennongxi and Xiangxi)in the TGR were monitored monthly from Jan.2019 to Jan.2020.The results indicated that the concentration of Chl a was the highest in May and the lowest in January,which was(29.802±19.970)μg·L^(–1) and(1.562±0.362)μg·L^(–1),respectively.The annual average concentration of Chl a was(10.810±10.908)μg·L^(–1).The concentration of Chl a was higher in Chongqing area than in Hubei area,and the highest concentration was found in Xiaojiang.Correlation analysis showed that there was a significant positive correlation between Chl a and total phosphorus,dissolved oxygen,COD_(Mn),and water temperature(P<0.05),and a significant negative correlation with phosphate and transparency(P<0.05).It was proved that phosphorus was the main determining factor for Chl a,and phosphorus control was of great significance to the prevention and control of algal bloom in the tributaries of the Three Gorges Reservoir.

关 键 词：三峡水库 藻类生物量 环境因子 

分 类 号：Q178.1[生物学—水生生物学]