Freshwater snails ( Bellamya aeruginosa) bioturbation to enhance nitrogen removal and associated mechanism in constructed wetlands

被引：0
作者：
Li, Xi [1 ,2 ]
Xie, Chen [1 ,2 ]
Xu, Yinghua [1 ,2 ,3 ]
Xia, Menghua [1 ,2 ,3 ]
Zhang, Miaomiao [1 ,2 ]
Li, Yuyuan [1 ,2 ]
Wu, Jinshui [1 ,2 ,3 ]
机构：
[1] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Beijing 410125, Hunan, Peoples R China
[2] Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Beijing 410125, Hunan, Peoples R China
[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2025年 / 417卷
基金：
中国国家自然科学基金;
关键词：
Benthos; Nitrogen removal; Constructed wetlands; Nitrification; Denitrification; BENTHIC FAUNA; COMMUNITY; SEDIMENTS; CYCLE;
D O I：
10.1016/j.biortech.2024.131849
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
In this study, total nitrogen (TN) removal efficiency of Pontederia cordata and Myriophyllum elatinoides in surface flow constructed wetlands (SFCWs) with Bellamya aeruginosa were 6.43% and 3.54% higher, respectively, than those in non-B. aeruginosa SFCWs. Further, bioturbation could promote N uptake by plants and release from sediment. In summer and autumn, potential nitrification rate was significantly higher in SFCWs with snails than that in SFCWs without snails. In each season, potential denitrification rate was significantly higher in SFCWs with snails than that in SFCWs without snails. Additionally, ammonia oxidizing archaea, narG, nirS, nirK and nosZ gene abundances were significantly higher in SFCWs with snails than those in SFCWs without snails. Structural equation model analysis revealed a strong positive correlation between nitrifiers and denitrifiers in SFCWs with snails, suggesting that bioturbation enhanced N removal by increasing synergistic effect of nitrifying and denitrifying bacteria.
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页数：11
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