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Article

Determining the Optimal Biomass of Macrophytes during the Ecological Restoration Process of Eutrophic Shallow Lakes

1
State Environmental Protection Key Laboratory for Lake Pollution Control, National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
2
Yunnan Research Academy of Eco-Environmental Sciences, Kunming 650034, China
3
School of Interdisciplinary Studies, University of Glasgow, Dumfries DG1 4ZL, UK
4
Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6700 AB Wageningen, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editors: Renata Dondajewska-Pielka and Agnieszka Budzyńska
Water 2021, 13(21), 3142; https://doi.org/10.3390/w13213142
Received: 14 September 2021 / Revised: 2 November 2021 / Accepted: 5 November 2021 / Published: 8 November 2021
(This article belongs to the Special Issue Lake Ecology and Restoration)
Many studies have shown that macrophytes play a significant role in controlling eutrophication; however, only a few of these are based on macrophyte biomass. Based on the growth characteristic of macrophytes, we propose an approach for the assessment of the optimal biomass of macrophytes in the decay and growth periods in Lake Datong (a shallow lake), using a lake ecological model. The results showed that the pollution load of the lake should be reduced by 50% while conforming to the Environmental Quality Standards for Surface Water (EQSSW) Class Ⅲ. In contrast, with an increase in the pollution load of 5%, the results indicate that the lake may deteriorate to a turbid state over the next few years. The macrophyte biomass should be harvested during the decay period, when 80% biomass is beneficial to the water quality of the eutrophic shallow lake. Based on macrophyte simulation from 2020–2024, the wet biomass of macrophytes should be controlled at 5.5 kg/m2. The current macrophyte biomass in Lake Datong is four-fold higher than the simulated optimal biomass. This study provides a reference for the adequate ecological restoration of the lake and its subsequent maintenance, as well as scientific support for improving the comprehensive evaluation standard of healthy lakes and the theoretical basis of lake ecological restoration. View Full-Text
Keywords: shallow lake; macrophytes; optimal biomass; PCLake; Lake Datong; lake management shallow lake; macrophytes; optimal biomass; PCLake; Lake Datong; lake management
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MDPI and ACS Style

Hu, W.; Wei, W.; Ye, C.; Li, C.; Zheng, Y.; Shi, X.; Chang, M.; Chen, H. Determining the Optimal Biomass of Macrophytes during the Ecological Restoration Process of Eutrophic Shallow Lakes. Water 2021, 13, 3142. https://doi.org/10.3390/w13213142

AMA Style

Hu W, Wei W, Ye C, Li C, Zheng Y, Shi X, Chang M, Chen H. Determining the Optimal Biomass of Macrophytes during the Ecological Restoration Process of Eutrophic Shallow Lakes. Water. 2021; 13(21):3142. https://doi.org/10.3390/w13213142

Chicago/Turabian Style

Hu, Wen, Weiwei Wei, Chun Ye, Chunhua Li, Ye Zheng, Xiaogang Shi, Manqi Chang, and Hongsen Chen. 2021. "Determining the Optimal Biomass of Macrophytes during the Ecological Restoration Process of Eutrophic Shallow Lakes" Water 13, no. 21: 3142. https://doi.org/10.3390/w13213142

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