氧化还原潜力驱动在红树林湿地沉积物中分离的微生物碳固定,具有取决于环境的影响
Shuang Yan1, Ruili Li2, Xiaoxue Shen2
1State Key Laboratory of Regional Environment and Sustainability, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China.
Marine pollution bulletin
|February 28, 2026
概括
氧化降低潜力 (ORP) 控制了红树林沉积物中的微生物群落,影响了碳固定. 氨的可用性有选择性地影响化剂和碳固定剂,揭示了合的生物地球化学循环.
科学领域:
- * 环境微生物学
- *生物地质化学 生物地质化学
- * 沿海生态 沿海生态
背景情况:
- *红树林湿地是重要的沿海生态系统,由氧化还原和营养动力学塑造.
- *潮沉会改变沉积物的特性,影响微生物群落和功能.
- *微生物对变化的氧化还原和营养条件的反应,特别是碳固定剂,尚未完全理解.
研究的目的:
- * 研究氧化降解潜能 (ORP) 和氨 (NH4+) 如何调节红树林沉积物中的微生物聚集和新陈代谢.
- *阐明微生物在不同的氧化还原和营养条件下固定碳的机制.
- * 了解在这些动态环境中氨氧化和碳固定之间的合.
主要方法:
- *整合了元基因组和元转录组测序.
- * 应用13C和15N同位素标记技术.
- *测量氧化降解潜力 (ORP) 和 (NH4+) 度.
主要成果:
- *ORP是微生物组成和多样性的主要驱动因素.
- *碳固定机制 (cmmG和cmmE) 与ORP有所不同,高ORP下碳固定率随着NH4+的增加而下降.
- *在低ORP下,氨的影响最小,其中总有机碳 (TOC) 影响更大;ORP选择性地影响了化剂和碳固定剂.
结论:
- * ORP在红树林沉积物中充当主要的环境过器,调节微生物社区的结构和功能.
- *氨的可用性有选择性地影响特定的微生物群体,包括化剂和碳固定微生物.
- *这项研究揭示了氨氧化与碳固定之间的机制性合,为红树林生态系统的弹性和环境变化下的生物地球化学循环提供了洞察力.
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