Scale dependence in functional equivalence and difference in the soil microbiome
Scale dependence in functional equivalence and difference in the soil microbiome
复制标题
功能等价性的尺度依赖性和土壤微生物组的差异
DOI：
10.1016/j.soilbio.2021.108451
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发表时间：
2021
影响因子：
9.7
通讯作者：
Bradford, Mark A.
中科院分区：
文献类型：
--
作者：
Polussa, Alexander;Gonzalez-Rivero, Javier;Fields, Nicholas;Jevon, Fiona V.;Wood, Stephen A.;Wieder, William R.;Bradford, Mark A.
气候历史可以塑造土壤微生物群落的功能，从而影响有机物质分解等生态系统过程的速率。例如，气候历史上广泛的空间尺度差异，如降水制度的对比，已被证明会对当代湿度条件产生独特的微生物功能响应。然而，土壤小气候的局部差异是否同样影响分解者群落的功能潜力，这是一个悬而未决的问题。在这里，我们使用多尺度的方法在两个温带森林田野内和之间调查这个问题。在一个受控的实验室微观研究中，来自54个不同土壤湿度气候条件的微站点的土壤被用作一种常见落叶（栎）的接种剂。将凋落物置于干燥、湿润和潮湿的实验室条件下，测定202 d凋落物的碳(C)矿化率。我们的研究结果揭示了在受控条件下分解率的差异，突出了每个地点土壤群落之间广泛的功能差异。具体来说，我们发现，在不同地点之间进行比较时，土壤群落的C矿化差异高达两倍。我们的研究结果还表明，土壤群落的功能差异在一个站点内可以观察到，而在另一个站点则没有。在当地尺度的功能遗产很明显的地点，在相同的当代实验室施加的湿度条件下，历史土壤湿度小气候制度产生了多达89%的凋落叶C矿化率变化。在另一个部位没有观察到类似的模式；相反，实验室湿度条件几乎解释了所有碳矿化的变化。值得注意的是，对于具有明显局域尺度功能遗产的站点，田间土壤微站点湿度的局域尺度变化要比不具有功能遗产的站点大得多，这表明局域尺度的微气候变化程度可能是是否观察到局域尺度功能遗产的控制因素。无论这一机制是否解释了我们的发现，我们的观察确实证实了以前的研究，即区域尺度的湿度制度差异塑造了微生物的功能，并通过提供证据证明土壤湿度微气候制度的明显局部尺度差异与微生物功能遗产有关，扩展了以前的工作。
Climatic history can shape the functioning of soil microbial communities and thus rates of ecosystem processes such as organic matter decomposition. For example, broad spatial scale differences in climatic history, such as contrasting precipitation regimes, have been shown to generate unique microbial functional responses to contemporary moisture conditions. Yet it is an open question as to whether local differences in soil microclimate similarly influence the functional potential of decomposer communities. Here, we use a multi-scale approach within and among two temperate forest field sites to investigate this question. Soils from fifty-four microsites, that vary in their soil moisture climate-regimes, were used as inocula for a common leaf litter (Quercus rubraL.) in a controlled, laboratory microcosm study. Microcosms were placed under dry, mesic and wet lab-moisture conditions and the rate of carbon (C) mineralization of the litter was measured over 202 days. Our results reveal differences in decomposition rates under controlled conditions that highlight broad-scale functional differences between the soil communities at each site. Specifically, we found that C mineralization differed by as much as two-fold for soil communities when compared between the sites. Our results also show that functional differences of soil communities are observable within one site but not the other. In the site where local-scale functional legacies were apparent, the historical soil moisture microclimate-regimes generated as much as an 89% change in C mineralization rates of the leaf litter under the same contemporary, lab-imposed moisture conditions. A similar pattern was not observable in the other site; instead, laboratory moisture conditions explained almost all variation in C mineralization. Notably, for the site with pronounced local-scale functional legacies, there was much greater within-site variation in field-soil microsite moisture than at the site which did not exhibit functional legacies, suggesting that the extent of local-scale variation in microclimate may act as control on whether local-scale functional legacies are observed. Regardless of whether this mechanism does explain our findings, our observations do confirm those from prior studies where regional-scale moisture-regime differences shape microbial function, and extend this prior work by providing evidence that pronounced local-scale differences in soil moisture microclimate-regimes are associated with microbial functional legacies.
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影响因子：
16.8
作者：
Bradford, Mark A.;McCulley, Rebecca L.;Fierer, Noah
通讯作者：
Fierer, Noah
土壤微生物组性状权衡介导的干旱遗产
影响因子：
2.7
作者：
Bin Wang;S. Allison
通讯作者：
S. Allison
影响因子：
64.8
作者：
Bond-Lamberty, Ben;Thomson, Allison
通讯作者：
Thomson, Allison
影响因子：
3.7
作者：
Loescher H;Ayres E;Duffy P;Luo H;Brunke M
通讯作者：
Brunke M
影响因子：
4
作者：
Belanger, Nicolas;Collin, Alexandre;Rivest, David
通讯作者：
Rivest, David