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土壤真菌群落的多样性,共同存在的网络,以及不同森林生态系统下的组装过程

Bing Yang¹, Zhisong Yang¹, Ke He¹

¹Sichuan Academy of Giant Panda, Chengdu 610081, China.

|September 28, 2024

概括

中国森林中的土壤真菌群落受到pH和营养水平等环境因素的影响,而不仅仅是森林类型. 随机过程,特别是扩散限制,主要塑造这些关键的土壤真菌结构.

科学领域:

生态生态学生态生态学
土壤科学土壤科学
菌类学菌类学是指菌类学.

背景情况:

菌群落对于森林生态系统中的土壤生物地质化学循环至关重要.
了解影响真菌多样性和社区聚集的因素至关重要,但仍然不完整.

研究的目的:

为了研究中国利齐平自然保护区的五种不同的植被类型的土壤真菌社区多样性和组装.
确定塑造土壤真菌社区结构和共发生网络的关键环境因素.

主要方法:

从上层土壤样本中分析真菌ITS序列.
评估α多样性 (Shannon,Simpson,Pielou) 和β多样性 (社区组成).
检查土壤的物理化学性质 (pH,有机碳,TN,TP,N/P比) 和并发网络分析.

主要成果:

顶层土壤真菌群落主要由阿斯科米科塔,巴西迪奥米科塔和莫蒂埃罗米科塔占据主导地位.
森林类型之间没有观察到α多样性的显著差异,但β多样性有显著差异.
土壤pH,土壤有机碳,总,总和N/P比被确定为关键的环境驱动因素.
对于每个森林类型,观察到不同的共发生网络,表明复杂的社区结构.
树叶常绿的宽叶和混合森林表现出高度的模块化和平均路径长度.

结论:

土壤真菌群落结构受到环境因素的重大影响,特别是土壤特性和营养素的可用性.
随机过程,特别是扩散限制,在塑造这些森林生态系统中的表层土壤真菌社区组合方面发挥着主导作用.
森林类型影响真菌群落组成和网络复杂性,突出了生态相互作用的特异性.

关键词:

同时发生的网络网络.确定性和随机的过程.的功能性协会的功能性协会 β 多样性 β 多样性

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