Microbial community structure in a constructed wetland based on a recirculating aquaculture system: Exploring spatio-temporal variations and assembly mechanisms

文献类型： 外文期刊

第一作者： Tian, Wenjie

作者： Tian, Wenjie;Xu, Ailing;Song, Zhiwen;Tian, Wenjie;Li, Qiufen;Luo, Zijun;Wu, Chao;Sun, Bo;Zhao, Danting;Chi, Saisai;Cui, Zhengguo;Li, Qiufen

作者机构：

关键词： Maricultural wastewater; Constructed wetlands; Recirculating aquaculture system; Microbial community; Community succession; Community assembly mechanism

期刊名称：MARINE ENVIRONMENTAL RESEARCH （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN： 0141-1136

年卷期： 2024 年 197 卷

页码：

收录情况： SCI

摘要： The diversity, composition and performance of microbial communities within constructed wetlands (CW) were markedly influenced by spatio-temporal variations. A pilot -scale integrated vertical -flow constructed wetland (IVCW) as the biological purification unit within a recirculating aquaculture system (RAS) was established and monitored in this study. The investigation aimed to elucidate the responses of community structure, cooccurrence networks, and assembly mechanisms of the microbial community to spatial and temporal changes. Spatially, all a -diversity indices and microbial networks complexity were significantly higher in the upstream pool of the IVCW than in the downstream pool. Temporally, the richness increased over time, while the evenness showed a decreasing trend. The number of nodes and edges of microbial networks increased over time. Notably, the stable pollutant removal efficiencies were observed during IVCW operations, despite a -diversity and bacterial community networks exhibited significant variations across time. Functional redundancy emerged as a likely mechanism contributing to the stability of microbial ecosystem functions. Null model and neutral model analyses revealed the dominance of deterministic processes shaping microbial communities over time, with deterministic influences being more pronounced at lower a -diversity levels. DO and inorganic nitrogen emerged as the principal environmental factor influencing microbial community dynamics. This study provides a theoretical foundation for the regulation of microbial communities and environmental factors within the context of IVCW.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序