基于循环水产养殖系统的建造湿地中的微生物社区结构:探索时空变化和组装机制
Wenjie Tian1, Qiufen Li2, Zijun Luo2
1School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266520, China; State Key Laboratory of Mariculture Biobreeding and Sustainable Goods, Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.
Marine environmental research
|March 20, 2024
概括
综合垂直流构造湿地 (IVCW) 中的微生物群落表现出空间和时间的变化. 功能冗余确保了稳定的污染物去除,尽管这些变化,由决定性过程驱动,并受到溶解氧和的影响.
科学领域:
- 环境微生物学 环境微生物学
- 废水处理 废水处理
- 水产养殖系统 水产养殖系统
背景情况:
- 建筑湿地 (CW) 对于循环水产养殖系统 (RAS) 的生物净化至关重要.
- 了解集成垂直流构建湿地 (IVCW) 中微生物社区动态是优化性能的关键.
- 时空变化显著影响微生物群落,影响生态系统功能.
研究的目的:
- 研究微生物社区结构,共发生网络和组装机制对IVCW空间和时间变化的反应.
- 确定影响微生物社区动态的关键环境因素.
- 探索尽管微生物群落的波动,但稳定的污染物去除效率背后的机制.
主要方法:
- 在RAS中建立和监控试点规模的IVCW.
- 在空间 (上游与下游) 和时间尺度上分析微生物社区的多样性,组成和网络复杂性.
- 应用零和中性模型来确定微生物社区聚集机制.
- 与溶解氧 (DO) 和无机等环境因素的相关性分析.
主要成果:
- 与下游相比,在上游IVCW池中观察到更高的alpha多样性和网络复杂性.
- 微生物丰富度随着时间的推移而增加,而均性则下降;网络大小 (节点和边缘) 也暂时增加.
- 尽管微生物群落存在显著的时空变化,但仍然保持了稳定的污染物去除效率,这归因于功能冗余.
- 随着时间的推移,决定性过程主导了微生物社区的聚集,特别是在较低的多样性水平上.
- 溶解氧 (DO) 和无机被确定为主要的环境驱动因素.
结论:
- 功能冗余是一个关键的机制,使IVCW能够稳定生态系统功能,尽管微生物社区的变化.
- 确定性过程在塑造IVCW中的微生物群落方面发挥着重要作用.
- 溶解氧和无机是调节微生物群落和优化RAS中的IVCW性能的关键因素.
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