College of Resource and Environment, Northeast Agricultural University, Harbin 150030, PR China.
College of Resource and Environment, Northeast Agricultural University, Harbin 150030, PR China.
Bioresour Technol. 2024 Sep;408:131155. doi: 10.1016/j.biortech.2024.131155. Epub 2024 Jul 23.
Previous studies have predominantly explored the response mechanisms of constructed wetlands (CWs) to singular disturbances. In practical applications, CWs are frequently subject to multiple disturbances, resulting in complex interference mechanisms. Therefore, this study aims to select harmful algal blooms and microalga ZM-5 as disturbances to investigate the response mechanisms of CWs. Results revealed a dynamic pattern in COD removal efficiency of CWs, with fluctuations at 39.0 ± 6.2 % and 80.1 ± 4.7 % during the disturbances, followed by a recovery to approximately 65.7 ± 3.2 %. Additionally, the CWs exhibited a capacity for self-recovery and enhanced stability by selectively promoting specific microbial communities through the regulation of the genes responsible for indole-3-acetic acid (IAA) and vitamin production. Importantly, this study underscored the establishment of a resilient microbial community structure within CWs following multiple disturbances, characterized by a more interconnected microbial network. These findings shed light on the adaptive mechanisms of CWs in the face of complex environmental challenges.
先前的研究主要探讨了人工湿地（CWs）对单一干扰的响应机制。在实际应用中，CWs 经常受到多种干扰，导致复杂的干扰机制。因此，本研究选择有害藻类水华和微藻 ZM-5 作为干扰因素，以研究 CWs 的响应机制。结果表明，CWs 的 COD 去除效率呈现动态变化模式，在干扰期间波动在 39.0±6.2%和 80.1±4.7%之间，随后恢复到约 65.7±3.2%。此外，CWs 通过调节负责吲哚-3-乙酸（IAA）和维生素产生的基因，选择性地促进特定微生物群落，表现出自我恢复和增强稳定性的能力。重要的是，本研究强调了在多重干扰后 CWs 内建立有弹性的微生物群落结构，其特征是微生物网络更加相互关联。这些发现揭示了 CWs 应对复杂环境挑战的适应机制。
