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在多环芳气压力下的沿海生态系统中解读微生物动态:社区聚集,相互作用网络和代谢适应
Mengting Li1, Hongsong Wang2, Hongxian Chu1
1Yantai Center of Coastal Zone Geological Survey, China Geological Survey, Yantai 264004, China; Observation and Research Station of Land-Sea Interaction Field in the Yellow River Estuary, Yantai 264000, China.
Environmental research
|October 24, 2025
概括
沿海河流和河口中的多环芳 (PAH) 污染会影响微生物群落. 较高的PAH水平增加了微生物多样性,改变了代谢途径,特别是代谢.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 生态毒理学 生态毒理学
背景情况:
- 多环芳 (PAH) 具有显著的毒性和致癌性风险,引发了人们对沿海污染的担忧.
- 对于水生生态系统中不同程度的PAH污染对微生物反应的理解有限.
研究的目的:
- 为了研究PAHs在河流和河口沉积物中的分离和分散.
- 分析微生物社区的聚集,相互作用网络和对PAH污染的反应代谢适应.
- 评估与不同PAH污染水平相关的生态风险.
主要方法:
- 沉积物样本从延内陆河和河口沿线的18个地点收集.
- 分析了PAH度和组成.
- 甲基因组测序用于研究微生物社区结构,相互作用和代谢功能.
主要成果:
- 河流中的PAH度显著高于河口的PAH度 (77.54 ng/g),比河口的PAH度高 (27.95 ng/g),表明河流中的生态风险更高.
- 在这两种环境中,高分子量PAHs占主导地位.
- 增加的PAH污染与更高的微生物多样性相关,更丰富的PAH降解细菌,加剧的物种间连接性,以及受损的能量和代谢途径.
结论:
- 微生物群落对不同的PAH污染水平表现出不同的反应,更高的污染会促进PAH降解剂,但也会破坏微生物网络的稳定.
- 随机过程在微生物群体的聚集中起着主导作用,特别是在高PAH压力下.
- 在沿海水生系统中,PAH污染显著改变了微生物的新陈代谢,特别是的生物地球化学.
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