Crop performance is predicted by soil microbial diversity across phylogenetic scales
Crop performance is predicted by soil microbial diversity across phylogenetic scales
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DOI：
10.1002/ecs2.4029
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发表时间：
2022-05
期刊：
影响因子：
2.7
通讯作者：
Richard A. Lankau;I. George;Max Miao
中科院分区：
文献类型：
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作者：
Richard A. Lankau;I. George;Max Miao
土壤包含多种生物群落，在农业生态系统中提供关键的生态系统功能。在许多系统中，生态系统功能与群落的分类、系统发育和功能多样性呈正相关。尽管有人呼吁将微生物多样性纳入土壤健康的衡量标准，但微生物多样性的增加是否可以预测作物健康和生产力的提高却很少有文献记载。在这里，我们使用了不同多样性和组成的商业马铃薯田的微生物群落，并实验评估了它们在低营养或高营养条件下促进作物产量和抑制土壤传播病原体的能力。在两组独立的群落中，我们发现低营养条件下的产量可以通过在广泛的系统发育水平上测量的高初始微生物多样性来预测，这与不相关类群之间更大的生态位互补性导致更大的总资源利用相一致。然而，疾病抑制与多样性之间的联系并不一致，微生物组成比多样性本身也能更好地解释这一点。生态系统的多功能性是通过在大到中等系统发育尺度上的高多样性来预测的。这些结果表明，微生物类群的多样性可能影响土壤的多种功能；然而，多样性-功能关系的机制可能有所不同。
Soils contain diverse living communities that provide key ecosystem functions in agroecosystems. In many systems, ecosystem functions are positively related to the taxonomic, phylogenetic, and functional diversity of the community. Despite calls to incorporate microbial diversity in measures of soil health, whether increased microbial diversityper secan predict increased crop health and productivity has rarely been documented. Here, we used microbial communities from commercial potato fields varying in diversity and composition, and experimentally assessed their ability to promote crop yield under low or high nutrient conditions and to suppress a soil‐borne pathogen. Across two independent sets of communities, we found that yields under low nutrient conditions were predicted by high initial microbial diversity measured at broad phylogenetic levels, consistent with greater niche complementarity among unrelated taxa leading to greater total resource use. However, disease suppression was inconsistently linked to diversity and was explained as well or better by microbial composition rather than diversityper se. Ecosystem multifunctionality was predicted by high diversity at broad to intermediate phylogenetic scales. These results indicate that the diversity of microbial taxa may influence multiple soil functions; however, the mechanisms underlying the diversity–function relationships may vary.