在红树林沉积物深度沿线的硫循环微生物群落的全面概况
Lu Qian1, Bozhi Yan1, Jiayin Zhou2
1School of Environmental Science and Engineering, Marine Synthetic Ecology Research Center, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), State Key Laboratory of Biocontrol, Sun Yat-Sen University, Guangzhou 510006, China.
The Science of the total environment
|June 14, 2024
概括
红树林沉积物微生物群体驱动硫 (S) 循环,不同的微生物群体和功能随着深度的变化而变化. 有机硫代谢在这些重要生态系统中从随机转向有针对性的过程.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学循环的过程
- 海洋生态海洋生态学
背景情况:
- 硫 (S) 循环对细胞和生态系统功能至关重要,特别是在富含S化合物的红树林沉积物中.
- 以前关于红树林S循环的研究往往忽视了全面的社区分析和有机S代谢.
- 了解微生物S循环是保持红树林生态系统健康的关键.
研究的目的:
- 综合分析红树林沉积物中S循环微生物群落的分布,生态网络和组装机制.
- 研究S循环微生物群落及其功能如何随着沉积物的深度而变化.
- 阐明特定微生物种类和基因在红树林S周期中的作用.
主要方法:
- 用元基因组测序来分析S循环微生物群落.
- 基因家族的丰富性被量化,以评估S循环过程.
- 使用统计分析来确定社区集会机制.
主要成果:
- 硫氧化和硫酸盐还原的基因丰度随着沉积深度的增加而减少,而S还原和二甲基硫化物 (DMS) 转化基因的增加.
- 像glpE (硫氧化) 这样的特定基因在表面沉积物中最高,而dmsA (DMS转化) 随着深度的增加而增加.
- 鉴定出 Pseudomonas 和 Streptomyces 是关键的 S 循环微生物,而 Thermococcus 在网络连接中可能很重要.
结论:
- 红树林沉积物微生物群体在S循环功能和种群中表现出深度依赖的变化.
- 社区的组成在很大程度上是由随机过程塑造的,有机S代谢显示了向深度决定性过程的转变.
- 这项研究为S循环微生物多样性,功能和组装提供了新的见解,这对于红树林生态系统管理至关重要.
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