多重压力因素影响淡水微生物群落的功能,而不是分类结构
Rose Fuggle1, Miguel G Matias2, Mariana Mayer-Pinto3
1The University of Sydney, School of Life and Environmental Sciences, Sydney, NSW, 2006, Australia. rose.fuggle@sydney.edu.au.
NPJ biofilms and microbiomes
|April 18, 2025
概括
营养丰富和盐化等环境压力因素会损害淡水生态系统中的微生物功能. 功能变化发生而没有改变细菌分类结构,表明潜在的生态系统过程中断.
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过程至关重要.
- 仅仅评估分类结构可能无法揭示环境压力因素的功能影响.
- 淡水系统面临着营养丰富和盐化造成的威胁.
研究的目的:
- 研究营养丰富和盐化对盆地微生物群落的影响.
- 为了确定功能变化是否独立于分类学变化而发生.
- 了解这些关键环境压力因素的综合影响.
主要方法:
- 在现场条件下利用了1000升的开放淡水池.
- 应用营养丰富 (+10 mg/L N, +1 mg/L P) 和盐化 (+15 g/L NaCl) 单独和组合.
- 随着时间的推移,监测盆地微生物群落的分类结构和代谢功能.
主要成果:
- 综合的压力因素显著降低了总碳代谢率 (最大和平均).
- 与单个压力因素或环境条件相比,在联合压力下代谢功能概况发生了变化.
- 尽管存在功能性改变,但细菌群体的分类结构没有显著变化.
结论:
- 谷微生物的代谢功能因营养丰富和盐化结合而受损.
- 功能障碍随着时间的推移而持续,并且没有发生分类学变化.
- 关键的生态系统功能,如有机碳释放,即使在稳定的微生物分类学中也可能受到损害.
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