沉积物内源释放的反应机制对功能性微生物及其蓝藻细菌生长和消失效应的影响
Wei Huang1, Xiaoshuang Dong2, Chengqi Tu2
1College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China; National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
The Science of the total environment
|October 10, 2023
概括
湖泊沉积物中的微生物群落驱动释放,推动蓝藻细菌的开花. 了解这些微生物与的相互作用是控制缩和蓝藻细菌爆发的关键.
科学领域:
- 环境微生物学环境微生物学
- 水生地质化学 水生地质化学
- 欧洲化研究的研究.
背景情况:
- 从湖泊沉积物中释放的内源 (P) 显著促进了缩和蓝藻细菌的繁殖,因为P是限制营养素.
- 微生物在调节P释放方面发挥着至关重要的作用,它们本身也受到P可用性的影响,但复杂的反应机制仍未得到充分研究.
- 在整个蓝藻细菌生命周期中,内源性P释放和微生物群落之间的动态相互作用尚未得到充分理解.
研究的目的:
- 研究内源释放与湖泊沉积物中的微生物社区结构和功能之间的关系.
- 阐明微生物功能基因在循环中的作用,涉及蓝藻细菌的生长和消失.
- 提供对内源性P释放的微观理解,以控制蓝藻细菌的开花.
主要方法:
- 用元基因组测序来分析微生物社区结构和不同时间点的功能基因.
- 使用诸如EPC0,EPC0F和NAP等因素评估释放潜力.
- 测量了沉积物P形式,特别是无机P (IP) 的数量.
主要成果:
- 沉积物微生物丰度 (基因) 与P释放能力正相关,在P释放峰值期间观察到的丰度最高.
- 具有P-溶解功能的蛋白细菌是占主导地位的族群,并且与P释放指标积极相关.
- 参与无机P溶解,有机P矿化和P运输的关键P循环功能基因被确定,主要在蛋白质细菌,酸性细菌,chloroflexi和actinobacteria中.
结论:
- 湖泊沉积物可以充当重要的P沉,特别是在休眠时期,为未来的蓝藻细菌繁殖创造条件.
- 微生物群落,特别是蛋白质细菌,是内源性P释放的核心,并影响蓝藻细菌的动态.
- 了解微生物P循环基因为管理内源性P释放和缓解轻化提供了一个新的理论基础.
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