Long-term study of ecological restoration in a typical shallow urban lake

Zisen Liu; Guoliang Bai; Yunli Liu; Yilingyun Zou; Zimao Ding; Rou Wang; Disong Chen; Lingwei Kong; Chuan Wang; Lei Liu; Biyun Liu; Qiaohong Zhou; Feng He; Zhenbin Wu; Yi Zhang

doi:10.1016/j.scitotenv.2022.157505

Long-term study of ecological restoration in a typical shallow urban lake

Sci Total Environ. 2022 Nov 10:846:157505. doi: 10.1016/j.scitotenv.2022.157505. Epub 2022 Jul 21.

Authors

Zisen Liu¹, Guoliang Bai², Yunli Liu³, Yilingyun Zou³, Zimao Ding⁴, Rou Wang³, Disong Chen¹, Lingwei Kong⁵, Chuan Wang⁶, Lei Liu⁷, Biyun Liu¹, Qiaohong Zhou¹, Feng He¹, Zhenbin Wu¹, Yi Zhang⁸

Affiliations

¹ State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
² State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; School of Environmental Studies, China University of Geosciences, Wuhan 430074, China.
³ State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China.
⁴ State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China.
⁵ Key Laboratory of Coastal Environment and Resources Research of Zhejiang Province, School of Engineering, Westlake University, Hangzhou 310024, China.
⁶ Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China.
⁷ State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China.
⁸ State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address: zhangyi@ihb.ac.cn.

PMID: 35870592
DOI: 10.1016/j.scitotenv.2022.157505

Abstract

We investigated the long-term effects (6 years) of sediment improvement and submerged plant restoration of a subtropical shallow urban lake, Hangzhou West Lake China. To reveal the lake ecosystems variations, we analyzed the sediment properties, submerged macrophyte characteristics, sediment microorganisms, and benthic macroinvertebrate communities from 2015 to 2020. The ecological restoration project decreased sediment TP and OM, increased submerged macrophyte biomass and sediment microbial diversity, and improved the benthic macroinvertebrate communities in the restored area. The sediment TP decreased from 2.94 mg/g in 2015 to 1.33 mg/g in 2020. The sediment OM of the restored area decreased from 27.44 % in 2015 to 8.08 % in 2020. Principal component analysis (PCA) confirmed that the restoration improved the sediment conditions, making it suitable for the growth of submerged macrophytes, and then sped up the restoration and reconstruction of the lake ecosystem. These results have significant implications on the ecological management of shallow lakes.

Keywords: Benthic macroinvertebrate; Ecological restoration project; Microorganisms; Sediment properties; Submerged macrophyte distribution.

MeSH terms

Biomass
China
Ecosystem*
Lakes*
Longitudinal Studies
Plants