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土壤溶解有机物分子组成的由驱动的变化与罕见的细菌子社区有关

Xiaochun Yuan¹, Quanxin Zeng², Xinyu Bai²

¹College of Tourism, Wuyi University, Wuyishan 354300, China; College of Geographical Science, Fujian Normal University, Fuzhou 350007, China; Fujian Provincial Key Laboratory for Subtropical Resources and Environment, Fujian Normal University, Fuzhou 350007, China.

The Science of the total environment

|December 21, 2024

概括

土壤中添加会改变溶解有机物 (DOM) 和细菌群落. 罕见的细菌,而不是丰富的细菌,驱动DOM变化,影响土壤碳循环和化学多样性.

科学领域:

环境科学环境科学
微生物生态学微生物生态学
生物地质化学生物地质化学

背景情况:

土壤溶解有机物 (DOM) 和细菌群落对全球碳循环至关重要.
在DOM和细菌之间的分子级相互作用还不太清楚.
添加 (N) 是影响土壤生态系统的关键因素.

研究的目的:

调查不同 (N) 添加水平对DOM组成和细菌子社区多样性的影响.
在N丰富下探索DOM和细菌群落之间的分子层次的关联.
为了确定哪些细菌群 (丰富与罕见) 在DOM变化中最具影响力.

主要方法:

使用高分辨率的里埃变换离子环子子共振质谱 (FT-ICR MS) 进行DOM分析.
采用高通量测序来评估细菌子社区的多样性.
应用β-多样性分解和共发生网络分析,以了解社区动态和DOM关联.

主要成果:

低添加减少了DOM中的碳水化合物含量,并增加了其异质性和稳定性.
罕见的细菌子群体对N添加具有更高的敏感性,具有更窄的和更弱的遗传学信号.
罕见的种类组合的变化是由物种的替代驱动的,与丰富的种类不同 (丰度差异).
DOM分子与罕见的细菌类比丰富的细菌类有更强烈的关联.
在罕见种类的β-多样性和沿N梯度的DOM分子之间发现了正相关性.

结论:

罕见的细菌子社区是DOM分子组成在丰富下转移的关键驱动因素.
这些罕见的种类在塑造土壤化学多样性方面发挥着重要作用.
了解这些相互作用对于预测土壤碳循环对环境变化的反应至关重要.

关键词:

溶解的有机物分子分子.里叶变换离子循环子共振质谱法的沉积沉积的沉积.罕见的细菌是一种罕见的细菌.替代物种是一种物种的替代.β-多样性的多样性

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