反复引入微污染物会增强微生物的继承,尽管有稳定的降解模式
Dandan Izabel-Shen1, Shuang Li2,3,4, Tingwei Luo5
1Department of Ecology, Environment and Plant Sciences, Stockholm University, 106 91, Stockholm, Sweden.
ISME communications
|November 8, 2023
概括
微污染物改变淡水微生物群落,从敏感细菌转变为耐受性细菌. 重复暴露驱使社区通过随机和决定性过程聚集,影响生态反.
科学领域:
- 环境微生物学 环境微生物学
- 生态毒理学 生态毒理学
- 社区生态学社区生态学
背景情况:
- 微污染物在地表水中的积累对环境构成风险.
- 微生物降解和微污染物压力下的社区聚集是研究不足的.
- 了解这些过程对于预测生态影响至关重要.
研究的目的:
- 研究常见微污染物对淡水微生物群落继承的影响.
- 评估这些社区的微生物降解能力.
- 阐明在社区集会中随机和决定性过程的作用.
主要方法:
- 淡水微生物在一个重复转移系统中暴露于微污染物中.
- 使用16S rRNA基因元编码分析了细菌社区的继承.
- 测量了微污染物去除速度,以评估降解.
主要成果:
- 微污染物暴露改变了微生物群落的组成,使耐受性细菌如Bacteroidetes和Gammaproteobacteria比敏感的Actinobacteria和Planctomycetes更受欢迎.
- 社区集会最初涉及随机过程,过渡到长期暴露的确定性过程.
- 微污染物降解率并没有随着时间的推移而增加.
结论:
- 反复暴露于微污染物显著重塑淡水微生物群落.
- 随机和决定性过程都控制着在污染物压力下微生物社区的组合.
- 研究结果突出了与气候变化情景相关的生态反机制.
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