Alleviating eutrophication by reducing the abundance of Cyanophyta due to dissolved inorganic carbon fertilization:Insights from Erhai Lake,China

作     者：Chaowei Lai Zhen Ma Zaihua Liu Hailong Sun Qingchun Yu Fan Xia Xuejun He Qian Bao Yongqiang Han Xing Liu Haibo He Chaowei Lai;Zhen Ma;Zaihua Liu;Hailong Sun;Qingchun Yu;Fan Xia;Xuejun He;Qian Bao;Yongqiang Han;Xing Liu;Haibo He

作者机构：State Key Laboratory of Environmental GeochemistryInstitute of GeochemistryCASGuiyang 550081China School of Water Resources and EnvironmentChina University of Geosciences(Beijing)Beijing 100083China University of Chinese Academy of SciencesBeijing 100049China Hefei UniversityHefei 230601China Sichuan Normal University Key Laboratory of Land Resources Evaluation and Monitoring in Southwest China of Ministry of EducationChengdu 610066China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第131卷第9期

页      面：68-83页

核心收录：

学科分类：08[工学] 0815[工学-水利工程] 

基　　金：supported by the National Natural Science Foundation of China(Nos.42130501,42141008,and 41977298) the Strategic Priority Research Program of the Chinese Academy of Science(No.XDB40020000) Special thanks to the Dali Erhai Research Institute for supporting us in sampling Erhai Lake 

主　　题：Dissolved inorganic carbon Nutrients limitation Phytoplankton species composition Eutrophication management Karst lake 

摘      要：The eutrophication of lakes is a global environmental *** nitrogen(N)and phosphorus(P)on phytoplankton is considered to be the most important basis of lake eutrophication ***,the effects of dissolved inorganic carbon(DIC)on phytoplankton and its role in mitigating lake eutrophication have often been *** this study,the relationships between phytoplankton and DIC concentrations,carbon isotopic composition,nutrients(N and P),and hydrochemistry in the Erhai Lake(a karst lake)were *** results showed that when the dissolved carbon dioxide(CO_(2)(aq))concentrations in the water were higher than 15μmol/L,the productivity of phytoplankton was controlled by the concentrations of TP and TN,especially by that of *** the N and P were sufficient and the CO_(2)(aq)concentrations were lower than 15μmol/L,the phytoplankton productivity was controlled by the concentrations of TP and DIC,especially by that of ***,DIC significantly affected the composition of the phytoplankton community in the lake(p0.05).When the CO_(2)(aq)concentrations were higher than 15μmol/L,the relative abundance of Bacillariophyta and Chlorophyta was much higher than those of harmful ***,high concentrations of CO_(2)(aq)can inhibit harmful Cyanophyta blooms.