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
作者： Tian, Wenjie 1 ; Li, Qiufen 2 ; Luo, Zijun 2 ; Wu, Chao 2 ; Sun, Bo 2 ; Zhao, Danting 2 ; Chi, Saisai 2 ; Cui, Zhengguo 2 ; Xu, Ailing 1 ; Song, Zhiwen 1 ;
作者机构： 1.Qingdao Univ Technol, Sch Environm & Municipal Engn, Qingdao 266520, Peoples R China
2.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Peoples R China
3.Nanjing Rd 106, Qingdao 266071, Shandong, Peoples R China
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.
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