Testing the contribution of dispersal to microbial succession following a wildfire.
Testing the contribution of dispersal to microbial succession following a wildfire.
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DOI：
10.1128/msystems.00579-23
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发表时间：
2023-10-26
期刊：
影响因子：
6.4
通讯作者：
中科院分区：
文献类型：
--
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鉴于野火活动的增加，人们越来越有兴趣了解火灾后微生物演替的驱动因素。扩散可能是特别重要的火灾后的演替生物群落更容易受到入侵后的干扰。在这里，我们实验操作分散到扰乱落叶群落收集野火后，跟踪细菌和真菌的分散组合随着时间的推移。我们发现，身份和来源的微生物迁移到土壤表面火灾后随时间变化的季节性变化和地上植被的重新出现。此外，分散显着有助于火灾后落叶微生物群落的重新组装，产生越来越明显的组装轨迹。扩散对α-多样性和β-多样性的影响依赖于生态系统，但出乎意料的是，在生态系统内以类似的方式影响细菌和真菌群落。总的来说，这些结果表明，扩散明确改变了野火后微生物群落演替的过程，并可能以平行的方式影响细菌和真菌，尽管预期会改变扩散模式的性状不同。确定微生物群落演替的机制对于预测微生物群落及其功能如何响应未来的环境变化是必要的。扩散是一种预计会影响微生物演替的机制，但在环境中操纵微生物的困难性限制了我们对其贡献的理解。使用扩散排除实验，本研究隔离的特定影响，随着时间的推移，野火后的细菌和真菌群落组装的环境扩散。这项工作表明，随着时间的推移，量化分散对土壤微生物群落的影响，并测试分散如何进一步与其他组装过程相互作用，以应对环境变化的潜力。
Given increased wildfire activity, there is growing interest in understanding the drivers of microbial succession after fire. Dispersal may be especially important to post-fire succession as biotic communities can be more susceptible to invasion following a disturbance. Here, we experimentally manipulated dispersal into disturbed leaf litter communities collected following a wildfire and tracked bacterial and fungal dispersal assemblages over time. We show that the identity and source of microbes immigrating into the soil surface post-fire change across time with seasonal shifts and the reemergence of aboveground vegetation. Further, dispersal significantly contributed to the reassembly of leaf litter microbial communities after the fire, producing an increasingly distinct assembly trajectory. The effect of dispersal on α-diversity and β-diversity was ecosystem dependent but, unexpectedly, influenced bacterial and fungal communities in a similar manner within ecosystems. Collectively, these results demonstrate that dispersal explicitly alters the course of microbial community succession following a wildfire and may impact bacteria and fungi in parallel ways, despite differing in traits expected to alter dispersal patterns. Identifying the mechanisms underlying microbial community succession is necessary for predicting how microbial communities, and their functioning, will respond to future environmental change. Dispersal is one mechanism expected to affect microbial succession, yet the difficult nature of manipulating microorganisms in the environment has limited our understanding of its contribution. Using a dispersal exclusion experiment, this study isolates the specific effect of environmental dispersal on bacterial and fungal community assembly over time following a wildfire. The work demonstrates the potential to quantify dispersal impacts on soil microbial communities over time and test how dispersal might further interact with other assembly processes in response to environmental change.
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DOI：
10.1038/ismej.2012.8
发表时间：
2012-08
期刊：
The ISME journal
影响因子：
--
作者：
通讯作者：
--
影响因子：
48
作者：
Callahan BJ;McMurdie PJ;Rosen MJ;Han AW;Johnson AJ;Holmes SP
通讯作者：
Holmes SP
影响因子：
11
作者：
Ferrenberg, Scott;O'Neill, Sean P.;Nemergut, Diana R.
通讯作者：
Nemergut, Diana R.
影响因子：
7.9
作者：
Bouskill, Nicholas J.;Mekonnen, Zelalem;Riley, William J.
通讯作者：
Riley, William J.
影响因子：
4
作者：
Dooley, Sandra R.;Treseder, Kathleen K.
通讯作者：
Treseder, Kathleen K.