Spatial vs. temporal controls over soil fungal community similarity at continental and global scales
Spatial vs. temporal controls over soil fungal community similarity at continental and global scales
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DOI：
10.1038/s41396-019-0420-1
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发表时间：
2019-08-01
期刊：
影响因子：
11
通讯作者：
Bhatnagar, Jennifer M.
中科院分区：
文献类型：
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作者：
Averill, Colin;Cates, LeAnna L.;Bhatnagar, Jennifer M.
大规模的环境测序工作已经改变了我们对土壤微生物群落组成和周转的空间控制的理解。然而，我们对时间控制的了解相对有限。这是微生物生态学的主要不确定性，因为越来越多的证据表明微生物群落组成对预测未来微生物群落功能很重要。在这里，我们使用大陆和全球尺度的土壤真菌群落调查，集中在北温带地区，估计时间和空间对土壤真菌群落周转的相对贡献。我们发现土壤真菌群落相似性在年内存在较大的时间差异，其中真菌群落在季节之间差异最大，相当于在数千公里的空间上观察到的群落更替。群落年际周转量相对小于年内周转量。某些环境协变量，特别是气候协变量，解释了一些时空效应，尽管不太可能是相同的机制驱动空间和时间转换。然而，这些常用的环境协变量并不能完全解释空间、时间与群落组成之间的关系。这些真菌群落更替的基线估计为估计微生物群落组成和功能遗留的潜在持续时间提供了一个起点。
Large-scale environmental sequencing efforts have transformed our understanding of the spatial controls over soil microbial community composition and turnover. Yet, our knowledge of temporal controls is comparatively limited. This is a major uncertainty in microbial ecology, as there is increasing evidence that microbial community composition is important for predicting microbial community function in the future. Here, we use continental- and global-scale soil fungal community surveys, focused within northern temperate latitudes, to estimate the relative contribution of time and space to soil fungal community turnover. We detected large intra-annual temporal differences in soil fungal community similarity, where fungal communities differed most among seasons, equivalent to the community turnover observed over thousands of kilometers in space. inter-annual community turnover was comparatively smaller than intra-annual turnover. Certain environmental covariates, particularly climate covariates, explained some spatial-temporal effects, though it is unlikely the same mechanisms drive spatial vs. temporal turnover. However, these commonly measured environmental covariates could not fully explain relationships between space, time and community composition. These baseline estimates of fungal community turnover in time provide a starting point to estimate the potential duration of legacies in microbial community composition and function.