Homogeneous Selection and Dispersal Limitation Dominate the Effect of Soil Strata Under Warming Condition

作者：Zhujun Wang, Kai Feng, Guangxin Lu, Hao Yu, Shang Wang, Ziyan Wei, Ning Dang, Yingcheng Wang, Ye Deng · 发表于：Frontiers in Microbiology · 年份：2022 · DOI：10.3389/fmicb.2022.801083 · 被引用次数：17 · 研究领域：Microbial Community Ecology and Physiology、Polar Research and Ecology、Gut microbiota and health

Global warming is likely to affect the underground microbial communities in various ecosystems, but the response of soil microbial communities along a vertical depth profile to global warming has been elusive. Herein, we leveraged a warming field experiment in Qinghai-Tibet Plateau grassland and investigated the community structure of prokaryotes and fungi from the upper (0–15 cm) and lower (15–30 cm) strata under ambient and elevated temperature treatments. Three-years continual warming only significantly shifted the prokaryotic community within the upper strata and there was no significant effect observed for the fungal community. Additionally, under ambient temperature, there were significant differences between the two strata in both the prokaryotic and fungal communities, but under warming, this effect was alleviated. Next, the prokaryotic and fungal community assembly processes were measured by a phylogenetic-bin-based null approach (iCAMP). Though deterministic and stochastic processes dominated the assembly of prokaryotic and fungal communities, respectively, the deterministic processes were strengthened under warming for both communities. Specifically, the increased portion of homogeneous selection, contributing to a homogenous state, led to a smaller difference between prokaryotic communities of the two soil strata under warming. The smaller difference in the stochastic process component, i.e. , dispersal limitation, contributed to the similar fungal community struc...