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Article

Research on the Application of Typical Biological Chain for Algal Control in Lake Ecological Restoration—A Case Study of Lianshi Lake in Yongding River

1
School of Municipal and Environmental Engineering, Hebei University of Architecture, Zhangjiakou 075000, China
2
Department of Water Ecological Environment, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Zuorro
Water 2021, 13(21), 3079; https://doi.org/10.3390/w13213079
Received: 4 September 2021 / Revised: 23 October 2021 / Accepted: 24 October 2021 / Published: 2 November 2021
(This article belongs to the Special Issue River Ecological Restoration and Groundwater Artificial Recharge)
Maintaining the health of lake ecosystems is an urgent issue. However, eutrophication seriously affects lakes’ ecological functions. Eutrophication is also the main target of lake ecological restoration. It is vital to carry out research on lake eutrophication control and energy flow evaluation in ecosystems scientifically. Based on in situ survey results for the aquatic life data for Lianshi Lake from 2018 to 2019, the Ecopath model was used to establish an evaluation index system for the typical biological chain to screen out the key species in the water ecosystem, and the fuzzy comprehensive evaluation (FCE) method was used to screen all the biological chains controlling algae. A combination of the FCE coupled with the Ecopath screening method for typical biological chains for algal control was applied to the Lianshi Lake area; the results show that the typical biological chain for algal control is phytoplankton (Phyt)–zooplankton (Zoop)–macrocrustaceans (Macc)–other piscivorous (OthP). Upon adjusting the biomass of Zoop and Macc in the typical biological chain for algal control to three times that of the current status, the ecological nutrition efficiency of Phyt was increased from 0.308 to 0.906. The material flow into the second trophic level from primary producers increased from 3043 to 8283 t/km2/year. The amount of detritus flowing into primary producers for sedimentation decreased from 7618 to 2378 t/km2/year. Finally, the total primary production/total respiratory volume (TPP/TR) decreased from 9.224 to 3.403, the Finn’s cycle index (FCI) increased from 13.6% to 17.5%, and the Finn’s average energy flow path length (FCL) increased from 2.854 to 3.410. The results suggest that the problem of eutrophication can be solved by introducing Zoop (an algal predator) and Macc to a large extent, resulting in improved ecosystem maturity. The research results can facilitate decision making for the restoration of urban lake water ecosystems. View Full-Text
Keywords: alga control; typical biological chain; Ecopath model; ecological restoration; Lianshi Lake alga control; typical biological chain; Ecopath model; ecological restoration; Lianshi Lake
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MDPI and ACS Style

Zhang, P.; Cui, X.; Luo, H.; Peng, W.; Gao, Y. Research on the Application of Typical Biological Chain for Algal Control in Lake Ecological Restoration—A Case Study of Lianshi Lake in Yongding River. Water 2021, 13, 3079. https://doi.org/10.3390/w13213079

AMA Style

Zhang P, Cui X, Luo H, Peng W, Gao Y. Research on the Application of Typical Biological Chain for Algal Control in Lake Ecological Restoration—A Case Study of Lianshi Lake in Yongding River. Water. 2021; 13(21):3079. https://doi.org/10.3390/w13213079

Chicago/Turabian Style

Zhang, Pengfei, Xiaoyu Cui, Huihuang Luo, Wenqi Peng, and Yunxia Gao. 2021. "Research on the Application of Typical Biological Chain for Algal Control in Lake Ecological Restoration—A Case Study of Lianshi Lake in Yongding River" Water 13, no. 21: 3079. https://doi.org/10.3390/w13213079

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