Plant-soil feedbacks and mycorrhizal type influence temperate forest population dynamics
Plant-soil feedbacks and mycorrhizal type influence temperate forest population dynamics
复制标题
DOI：
10.1126/science.aai8212
复制
发表时间：
2017-01-13
期刊：
影响因子：
56.9
通讯作者：
Klironomos, John
中科院分区：
文献类型：
--
作者：
Bennett, Jonathan A.;Maherali, Hafiz;Klironomos, John
土壤生物反馈是陆地植物多样性的重要决定因素。然而，调节植物-土壤反馈的因素在植物物种之间从正到负变化，仍然不确定。在一项涉及55个物种和550个北美树木种群的大规模研究中，菌根关联的类型解释了植物-土壤反馈的大部分变化。在同种下收集的土壤中，丛枝菌根树经历了负反馈，而外生菌根树表现出正反馈。此外，丛枝菌根树表现出强烈的同种抑制在多个空间尺度上，而外生菌根树表现出同种促进本地和不太严重的同种抑制区域。这些结果表明，菌根类型，通过植物-土壤反馈的影响，可能是一个重要的贡献者在温带森林的人口调节和社区结构。
Feedback with soil biota is an important determinant of terrestrial plant diversity. However, the factors regulating plant-soil feedback, which varies from positive to negative among plant species, remain uncertain. In a large-scale study involving 55 species and 550 populations of North American trees, the type of mycorrhizal association explained much of the variation in plant-soil feedbacks. In soil collected beneath conspecifics, arbuscular mycorrhizal trees experienced negative feedback, whereas ectomycorrhizal trees displayed positive feedback. Additionally, arbuscular mycorrhizal trees exhibited strong conspecific inhibition at multiple spatial scales, whereas ectomycorrhizal trees exhibited conspecific facilitation locally and less severe conspecific inhibition regionally. These results suggest that mycorrhizal type, through effects on plant-soil feedbacks, could be an important contributor to population regulation and community structure in temperate forests.