It is elemental: soil nutrient stoichiometry drives bacterial diversity
It is elemental: soil nutrient stoichiometry drives bacterial diversity
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DOI：
10.1111/1462-2920.13642
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发表时间：
2017-03-01
影响因子：
5.1
通讯作者：
Singh, Brajesh K.
中科院分区：
文献类型：
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作者：
Delgado-Baquerizo, Manuel;Reich, Peter B.;Singh, Brajesh K.
资源数量和元素化学计量在地上和地下植物多样性的形成中起主要作用，但对土壤微生物多样性的影响尚不清楚。在这里，我们对覆盖苏格兰179个地点和6种生态系统类型的区域数据库进行了统计建模，以评估总碳(C)、氮(N)和磷(P)的有效性和比率，以及土地利用、气候、生物和非生物因素，在确定土壤细菌多样性的区域尺度模式中的作用。我们发现，细菌多样性和组成主要受土壤资源化学计量（总C:N:P比值）变化的驱动，其本身与不同的土地利用方式有关，其次受其他重要的生物多样性驱动因素的驱动，如气候、土壤空间异质性、土壤pH、根系影响（植物-土壤微生物相互作用）和微生物生物量（土壤微生物-微生物相互作用）。总的来说，这些发现提供了营养化学计量学在区域尺度上是细菌多样性和组成的一个强有力的预测指标的证据。
It is well established that resource quantity and elemental stoichiometry play major roles in shaping below and aboveground plant biodiversity, but their importance for shaping microbial diversity in soil remains unclear. Here, we used statistical modeling on a regional database covering 179 locations and six ecosystem types across Scotland to evaluate the roles of total carbon (C), nitrogen (N) and phosphorus (P) availabilities and ratios, together with land use, climate and biotic and abiotic factors, in determining regional scale patterns of soil bacterial diversity. We found that bacterial diversity and composition were primarily driven by variation in soil resource stoichiometry (total C:N:P ratios), itself linked to different land uses, and secondarily driven by other important biodiversity drivers such as climate, soil spatial heterogeneity, soil pH, root influence (plant-soil microbe interactions) and microbial biomass (soil microbe-microbe interactions). In aggregate, these findings provide evidence that nutrient stoichiometry is a strong predictor of bacterial diversity and composition at a regional scale.