|Dynamic variations of microbial community structure in Myriophyllum aquaticum constructed wetlands in response to different NH4+-N concentrations|
|Xu, Lina; Zhang, Bao; Peng, Xiawei; Zhang, Xupo; Sun, Bo; Sun, Haishu; Jiang, Cancan; Zhou, Sining; Zeng, Xiangui; Bai, Zhihui; Xu, Shengjun; Zhuang, Xuliang
|Source Publication||PROCESS BIOCHEMISTRY
|Abstract||Constructed wetlands (CWs) have received increasing attentions for their N removal performances, especially regarding NH4+-N. Different influent NH4+-N concentration may influence N removal efficiency in practice, while the effects of different NH4+-N concentrations on microorganisms removing N in CWs are poorly understood. In this study, surface flow CWs planted with Myriophyllum (M). aquaticum were established to investigate the influences of different NH4+-N concentrations on the composition, structure, and interactions of microbial community. Our findings suggested 105 mg/L NH4+-N CWs achieved highest N removal rate, removing 89.30 % NH4+-N and 92.34 % TN from the influent. The results of real-time quantitative polymerase chain reactions (qPCR) indicated abundances of nitrifying genes (nxrA) and denitrifying genes (narG, nirS, nirK, and nosZ) were increased by increasing NH4+-N concentrations, and the strongest effects were observed in narG (8-fold) and nosZ genes (11-fold). Different NH4+-N concentrations was proved to alter composition and structure of microbial communities via high-throughput sequencing, e.g. denitrifiers including Brevendomonas.sp, Dokdonella.sp and Rhodococcus.sp were enriched obviously with increasing NH4+-N concentrations. In addition, network showed interactions among microbial populations and positive interactions were dramatically shifted and enhanced by increasing NH4+-N concentrations.|
Ammonium nitrogen concentrations
Microbial community structure
Xu, Lina,Zhang, Bao,Peng, Xiawei,et al. Dynamic variations of microbial community structure in Myriophyllum aquaticum constructed wetlands in response to different NH4+-N concentrations[J]. PROCESS BIOCHEMISTRY,2020,93:55-62.
Xu, Lina.,Zhang, Bao.,Peng, Xiawei.,Zhang, Xupo.,Sun, Bo.,...&Zhuang, Xuliang.(2020).Dynamic variations of microbial community structure in Myriophyllum aquaticum constructed wetlands in response to different NH4+-N concentrations.PROCESS BIOCHEMISTRY,93,55-62.
Xu, Lina,et al."Dynamic variations of microbial community structure in Myriophyllum aquaticum constructed wetlands in response to different NH4+-N concentrations".PROCESS BIOCHEMISTRY 93(2020):55-62.
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