根际
微生物种群生物学
污染物
适应性
摄动(天文学)
环境科学
生态演替
湿地
人工湿地
生态学
环境化学
环境工程
生物
化学
细菌
物理
遗传学
量子力学
作者
Xinyue Zhao,Mengran Guo,Juntong Chen,Zhixuan Zhuang,Tuoshi Zhang,Xiaohui Wang,Chunyan Li,Ning Hou,Shunwen Bai
标识
DOI:10.1016/j.biortech.2022.127733
摘要
Constructed wetlands (CWs) are widely considered as resilient systems able to adapt to environmental perturbations. Little attention has been paid, however, to microbial dynamics when CWs withstand and recover from external shock. To understand the resilience of CWs, this study investigated rhizosphere microbial dynamics when CWs were subjected to influent COD perturbation (200 mg/L-1600 mg/L). Results demonstrated that CWs had strong adaptability to different influent perturbations, characterized by transitions from fluctuating to stable pollutant removal. Microbial analysis showed that rhizosphere microorganisms competed for niches in response to increased COD concentrations, and Trichococcus played key roles in resisting concentration perturbations. Structural equation modeling indicated that rhizosphere community succession and microbial energy metabolism were shaped by pH and DO. These findings provide insights into the mechanism for CW stability maintenance when facing concentration perturbations.
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