Alleviating eutrophication by reducing the abundance of Cyanophyta due to dissolved inorganic carbon fertilization: Insights from Erhai Lake, China
成果归属作者：
成果归属机构：
作者：
Lai, Chaowei ; Ma, Zhen ; Liu, Zaihua ; Sun, Hailong ; Yu, Qingchun ; Xia, Fan ; He, Xuejun ; Bao, Qian ; Han, Yongqiang ; Liu, Xing ; He, Haibo
单位：
China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China;Hefei Univ, Hefei 230601, Peoples R China;Chinese Acad Sci, Inst Geochem, State Key Lab Environm Geochem, Guiyang 550081, Peoples R China;Univ Chinese Acad Sci, Beijing 100049, Peoples R China;Sichuan Normal Univ, Key Lab Land Resources Evaluat & Monitoring Southw, Minist Educ, Chengdu 610066, Peoples R China
关键词：
ALTERS COMMUNITY COMPOSITION; WATER-QUALITY; CONCENTRATING MECHANISMS; CO2; PHOSPHORUS; NUTRIENT; PHYTOPLANKTON; LIMITATION; NITROGEN; ECOSYSTEMS
摘要：
The eutrophication of lakes is a global environmental problem. Regulating nitrogen (N) and phosphorus (P) on phytoplankton is considered to be the most important basis of lake eutrophication management. Therefore, the effects of dissolved inorganic carbon (DIC) on phytoplankton and its role in mitigating lake eutrophication have often been overlooked. In 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 investigated. The results showed that when the dissolved carbon dioxide (CO 2(4 ) concentrations in the water were higher than 15 pmoVL, the productivity of phytoplankton was controlled by the concentrations of TP and TN, especially by that of TP. When the N and P were sufficient and the CO 2(aq) concentrations were lower than 15 pmoVL, the phytoplankton productivity was controlled by the concentrations of TP and DIC, especially by that of DIC. Additionally, DIC significantly affected the composition of the phytoplankton community in the lake ( p < 0.05). When the CO 2(aq) concentrations were higher than 15 pmoVL, the relative abundance of Bacillariophyta and Chlorophyta was much higher than those of harmful Cyanophyta . Thus, high concentrations of CO 2(aq) can inhibit harmful Cyanophyta blooms. During lake eutrophication, when controlling N , P, an appropriate increase in CO2(aq) concentrations by land-use changes or pumping of industrial CO2 into water may reduce the proportion of harmful Cyanophyta and promote the growth of Chlorophyta and Bacillar-iophyta, which may provide effectively assist in mitigating water quality deterioration in surface waters.(c) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
基金：
National Natural Science Foundation of China [42130501, 42141008, 41977298]; Strategic Priority Research Program of Chinese Academy of Science [XDB40020000]
语种：
英文
来源：
JOURNAL OF ENVIRONMENTAL SCIENCES,2023():68-83.
出版日期：
2023-09
提交日期：
2023-02-18
引用参考：
Lai, Chaowei; Ma, Zhen; Liu, Zaihua; Sun, Hailong; Yu, Qingchun; Xia, Fan; He, Xuejun; Bao, Qian; Han, Yongqiang; Liu, Xing; He, Haibo. Alleviating eutrophication by reducing the abundance of Cyanophyta due to dissolved inorganic carbon fertilization: Insights from Erhai Lake, China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2023():68-83.