Spatio-temporal distribution and driving factors of phytoplankton biomass in Lake Yangzong under the background of arsenic pollution treatment

被引：0

作者：

Zheng X. ^{[1
]}

Chen L. ^{[1
]}

Qiu F. ^{[1
]}

Zhang T. ^{[1
]}

Zhang Z. ^{[1
]}

Shang L. ^{[1
]}

Bai N. ^{[1
]}

Chen X. ^{[1
]}

Zhao S. ^{[1
]}

Kong L. ^{[1
]}

Chen G. ^{[1
]}

机构：

[1] Yunnan Key Laboratory of Plateau Geographical Processes and Environmental Change, Faculty of Geography, Yunnan Normal University, Kunming

来源：

Hupo Kexue/Journal of Lake Sciences | 2024年 / 36卷 / 01期

关键词：

arsenic pollution; biomass; Lake Yangzong; phytoplankton; pollution treatment;

D O I：

10.18307/2024.0111

中图分类号：

学科分类号：

摘要：

Arsenic contamination has become an important environmental issue of some water bodies in China under the background of economic development and basin exploitation. However, limited attention has been paid to the effects of arsenic pollution prevention and ecological restoration. Phytoplankton is the key primary producer in lake ecosystems. Arsenic can directly affect the phytoplankton growth, species succession and primary productivity, and has become a sensitive indicator of arsenic pollution and its ecological effects. Lake Yangzong has a long history of arsenic pollution and subsequent remediation efforts. We conducted a seasonal survey on phytoplankton and environmental factors of Lake Yangzong covering the south, central and north parts of the lake from 2015 to 2019. The survey data were used to identify the spatio-temporal pattern and driving factors of phytoplankton biomass, and to evaluate the mechanism of phytoplankton biomass changes and effect of eco-restoration under arsenic pollution and treatment. The results showed that the phytoplankton was mainly composed of Cyanophyta. The phytoplankton biomass was in a range of 0.7-30.4 mg/L, with the lowest value in 2016 ((3.0±1.8) mg/L) and the highest value in 2017 ((10.5±8.9) mg/L). The phytoplankton biomass showed significant seasonal variations, but did not show significant spatial difference. The correlation analysis showed that the phytoplankton biomass had a significantly negative correlation with arsenic concentration and transparency, but had a significantly positive correlation with water temperature and pH. The multivariable linear regression model further showed that temperature and arsenic were the key environmental factors in driving the change of phytoplankton biomass. Thus, the arsenic residues in water body still inhibit phytoplankton growth after remediation in heavy metal polluted lakes, indicating that heavy metal pollutants may have long-term effects due to sediment release and enduring ecotoxicological impacts. © 2024 Science Press. All rights reserved.

引用

页码：34 / 42

页数：8

共 47 条

[1] Huang JC, Zhang YJ, Arhonditsis GB, Et al., How successful are the restoration efforts of China's lakes and reservoirs?, Environment International, 123, pp. 96-103, (2019)
[2] Wang ZH, He B, Pan XJ, Et al., Levels, trends and risk assessment of arsenic pollution in Yangzonghai Lake, Yunnan Province, China, Science China Chemistry, 53, 8, pp. 1809-1817, (2010)
[3] Qi JY, Xu ZC, Li XP, Et al., Study on source and speciation distribution characteristics of arsenic in Yangzonghai Lake waters, Journal of Anhui Agricultural Sciences, 3 8, pp. 10789-10792, (2010)
[4] Han RP, Zhang LY, Zhang FF, Et al., Analysis on water quality and hygiene of rural drinking water safety project in Kunming during the eleventh five-year plan, Practical Preventive Medicine, 18, 5, pp. 854-856, (2011)
[5] Chen J, Wang S, Zhang S, Et al., Arsenic pollution and its treatment in Yangzonghai Lake in China
[6] In situ remediation, Ecotoxicology and Environmental Safety, 122, pp. 178-185, (2015)
[7] Chen J, Zhang S, Yang XJ, Et al., Removal of arsenic from Yangzonghai Lake by ferric salt llocculation and field experiment, Environmental Science, 1, pp. 202-208, (2015)
[8] Chen GJ, Shi HB, Tao JS, Et al., Industrial arsenic contamination causes catastrophic changes in freshwater ecosystems, Scientific Reports, 5, (2015)
[9] Zhang Y, Chang FQ, Liu Q, Et al., Contamination and eco-risk assessment of toxic trace elements in lakebed surface sediments of Lake Yangzong, southwestern China, Science of the Total Environment, 843, (2022)
[10] Bai NJ, Chen L, Jiang YN, Et al., Spatial and temporal distribution characteristics and driving factors analysis of phytoplankton under arsenic pollution in Yangzonghai, J Lake Sci, 3 1, 1, pp. 149-160, (2019)

← 1 2 3 4 5 →