Temporal turnover of the soil microbiome composition is guild-specific

Although spatial and temporal variation are both important components structuring microbial communities, the exact quantification of temporal turnover rates of fungi and bacteria has not been performed to date. In this study, we utilized repeated resampling of bacterial and fungal communities at specific locations across multiple years to describe their patterns and rates of temporal turnover. Our results show that microbial communities undergo temporal change at a rate of 0.010-0.025 per year (in units of Sorensen similarity), and the change in soil is slightly faster in fungi than in bacteria, with bacterial communities changing more rapidly in litter than soil. Importantly, temporal development differs across fungal guilds and bacterial phyla with different ecologies. While some microbial guilds show consistent responses across regional locations, others show site-specific development with weak general patterns. These results indicate that guild-level resolution is important for unde...尽管空间变异与时间变异均为调控微生物群落结构形成的关键要素，但截至目前，学界尚未对真菌与细菌的时间周转速率开展精准定量研究。本研究通过对多个固定采样点位的细菌与真菌群落进行多年重复采样，系统刻画了二者的时间周转模式与周转速率。研究结果显示，微生物群落的年时间变化速率为0.010~0.025（以索伦森相似度（Sorensen similarity）为单位）；其中土壤生境中真菌群落的时间周转速率略快于细菌，而枯落物生境中细菌群落的周转速率则显著高于土壤。值得注意的是，具有不同生态特征的真菌功能群与细菌菌门，其时间演替模式存在显著差异。部分微生物功能群在不同区域点位均表现出一致的演替响应，而另一些功能群则仅呈现位点特异性的演替特征，缺乏普适性规律。上述研究结果表明，功能群层面的分类分辨率对于未竟研究具有重要意义。