多种环境压力因素的结合大大改变了水生生态系统中微生物群落的组合
Xiaofeng Niu1, Huan Wang1, Tao Wang2
1School of Marine Biology and Fisheries, State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, Hainan, 570228, PR China; Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, PR China.
Journal of environmental management
|November 23, 2023
概括
环境压力因素,如变暖,除草剂和营养物质负载,改变了水生生态系统中的微生物社区聚集. 压力因素改变了组装过程,变暖和除草剂产生了最重要的影响,特别是在水中.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 微生物学 微生物学
背景情况:
- 微生物群落对于生态系统服务至关重要.
- 气候变化,肥胖化和除草剂等环境压力因素威胁到微生物的聚集.
- 多种压力因素对水生微生物群落的累积影响仍然不太清楚.
研究的目的:
- 调查气候变暖,除草剂和营养物质负载对浅湖生态系统中微生物社区聚集的累积影响.
- 在各种压力条件下的微生物社区组合中区分确定性和随机过程的作用.
- 了解多种压力因素对微生物社区结构和功能的相互作用影响.
主要方法:
- 48个中宇宙实验模拟浅湖生态系统.
- 应用于变暖 (连续和热浪),基于草甘的除草剂和营养物质加载.
- 在水和沉积物样本中分析微生物社区聚集过程.
主要成果:
- 在对照条件下,决定性和随机过程共同主导了水中的微生物组,而沉积物组主要是随机的.
- 压力因素扭转了组装的主导地位:在水中占据了随机过程,在沉积物中占据了决定性过程.
- 变暖放大了除草剂的影响,并且比营养物质的影响更大,水中的综合压力因素 (WEG) 影响最大.
- 水和沉积物中的微生物群落表现出同质的组合,水表现出更紧密的基因组聚类.
结论:
- 多种环境压力因素显著改变水生生态系统中的微生物群落组合,具有息地特定的反应.
- 变暖和除草剂相互作用,推动微生物社区的转移,突出显示需要考虑组合的环境威胁.
- 沉积物微生物社区的变化可以作为预测湖泊生态系统发展和告知环境管理策略的关键指标.
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