Effects of Aquatic Plant Diversity and Cipangopaludinas chinensis on Nitrogen Removal and Its Stability in Constructed Wetlands

Guangqian Kuang, Jingwen Tao, Xiangyong Zheng, Luping Yang, Kai Shen, Xile Xu, Derong Xiao, Min Zhao and Wenjuan Han ()
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Guangqian Kuang: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Jingwen Tao: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Xiangyong Zheng: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Luping Yang: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Kai Shen: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Xile Xu: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Derong Xiao: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Min Zhao: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China
Wenjuan Han: College of Life and Environmental Science, Wenzhou University, Wenzhou 325035, China

Sustainability, 2024, vol. 16, issue 21, 1-14

Abstract: In constructed wetlands (CWs), aquatic plant diversity can enhance system nitrogen (N) removal. However, the impact of aquatic plant diversity with different life forms and benthic animals on the N (NO 3 − -N, NH 4 + -N, TIN) removal and its stability has been neglected. This study established 42 simulated CWs, selecting three aquatic plant species with different life forms to establish plant species diversity, with benthic animals ( Cipangopaludinas chinensis) added or not added at each diversity level. The results indicated that (1) the presence of the aquatic plant Pistia stratiotes increased the effluent nitrate nitrogen (NO 3 − -N) concentration. (2) In systems with or without C. chinensis , the plant species richness increased the temporal stability of the effluent NO 3 − -N concentration; the presence of the aquatic plant Vallisneria natans increased the temporal stability of the effluent total inorganic nitrogen (TIN) concentration in systems without C. chinensis and the temporal stability of the effluent NO 3 − -N concentration in systems with C. chinensis . (3) Adding C. chinensis significantly reduced the temporal stability of the effluent TIN concentration in the monoculture of V. natans . The rational establishment of aquatic plant diversity with benthic animals can improve the effluent’s water quality while ensuring the water quality’s temporal stability.

Keywords: species richness; species identity; benthic animals; pollutant removal; variability (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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