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细菌群落在针叶和混合针叶宽叶森林土壤中的不同组合和功能作用

Dexing Chen^1,2, Ziyang Zhang^1,2, Shunfen Wang^1,2

¹Fujian Colleges and Universities Engineering Research Institute of Conservation and Utilization of Natural Bioresources, College of Forestry, Fujian Agriculture and Forestry University, Fuzhou, China.

|March 6, 2026

概括

多样化的森林土壤拥有丰富和罕见的细菌,对营养循环至关重要. 与仅有针叶树的树群相比,混合森林支持更大的微生物功能多样性,突出显示了对生态系统保护的需要.

科学领域:

土壤微生物学土壤微生物学
生态系统生态学的生态学.
森林科学森林科学

背景情况:

森林土壤含有各种细菌,对营养循环至关重要.
不同类型的森林 (针叶与混合) 对细菌群落的影响尚不清楚.
丰富和罕见的细菌种群在生态系统功能中发挥着不同的作用.

研究的目的:

为了比较土壤细菌社区结构,组装,网络和树和混合树宽叶森林之间的功能潜力.
确定驱动丰富和罕见细菌种群分布的环境因素.
为了阐明森林土壤中丰富的细菌与罕见的细菌的生态作用.

主要方法:

集成的16S rRNA基因扩增和元基因组猎枪测序.
对社区结构,组装机制 (零模型) 和共发生网络的比较分析.
评估土壤的物理化学特性 (pH,有机物质,营养物质).

主要成果:

森林类型之间细菌群体组成的显著差异,无论是丰富的还是罕见的种类.
土壤pH和有机物影响了总/丰富的社区;P和K影响了罕见的社区.
混合森林显示在糖化,碳水化合物降解和固定途径中的丰富性;针叶树林偏好应激反应途径.

结论:

丰富和罕见的细菌种群表现出不同的分布模式和由森林类型和土壤特性影响的组装过程.
社区聚集主要是随机的,漂移主导总/稀有社区,分散限制影响丰富的社区.
保护混合森林对于保持土壤微生物的功能多样性和生态系统健康至关重要.

关键词:

同时发生的网络.社区集会社区集会针叶树和混合森林.微生物多样性的微生物多样性土壤细菌群落土壤细菌群落

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