微生物相互作用促使环中性湿地形成浮动铁膜
Leheng Dong1, Manjia Chen2, Chengshuai Liu3
1College of Agriculture / Tree Peony, Henan University of Science and Technology, Luoyang 471023, China; National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
The Science of the total environment
|October 13, 2023
概括
微生物群落通过氧化和减少铁来推动湿地中浮动铁膜的形成,从而影响营养循环和碳固定. 这些发现揭示了这些关键湿地结构背后的生物过程.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 湿地科学 湿地科学
背景情况:
- 浮动铁 (Fe) 薄膜在湿地中很常见,形成独特的氧-无氧接口.
- 这些薄膜通过氧化还原转化显著影响营养和微量金属的生物可用性.
- 以前的研究主要集中在化学Fe膜的形成上,忽视了微生物的作用.
研究的目的:
- 研究参与湿地浮动Fe膜形成的微生物群落.
- 确定有助于Fe膜生成和生物地化学循环的特定微生物过程.
主要方法:
- 在浮动的Fe膜中分析Fe物种和微生物群落.
- 确定主导的微生物属和相关的功能基因 (例如,碳固定).
主要成果:
- 铁化物是主要的Fe (III) 阶段,混合价值Fe表明生物形成.
- 主导的属包括氧化铁的细菌 (Leptothrix,Ferriphasclus,Gallionella),减少铁的细菌 (Geobacter) 和甲类植物 (Methylococcales).
- 有证据表明,由特定细菌氧化铁可促进碳固定,而减少铁可促进Fe和碳循环.
结论:
- 微生物过程,包括铁的氧化,还原和甲的氧化,对于浮动Fe膜在湿地中的形成至关重要.
- 这些微生物活动大大促进了Fe和碳循环,影响了湿地生物地质化学.
- 需要进一步的研究才能充分理解这些微生物的复杂相互作用及其生物地化学作用.
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