Department of Evolution and Ecology, University of California, Davis, CA, 95616, USA.
Ecol Lett. 2014 Dec;17(12):1613-21. doi: 10.1111/ele.12378. Epub 2014 Oct 17.
We examined whether plant-soil feedback and plant-field abundance were phylogenetically conserved. For 57 co-occurring native and exotic plant species from an old field in Canada, we collected a data set on the effects of three soil biota treatments on plant growth: net whole-soil feedback (combined effects of mutualists and antagonists), feedback with arbuscular mycorrhizal fungi (AMF) collected from soils of conspecific plants, and feedback with Glomus etunicatum, a dominant mycorrhizal fungus. We found phylogenetic signal in both net whole-soil feedback and feedback with AMF of conspecifics; conservatism was especially strong among native plants but absent among exotics. The abundance of plants in the field was also conserved, a pattern underlain by shared plant responses to soil biota. We conclude that soil biota influence the abundance of close plant relatives in nature.
我们研究了植物-土壤反馈和植物田间丰度是否具有系统发育保守性。对于来自加拿大一个旧田的 57 种共存的本地和外来植物物种，我们收集了一组关于三种土壤生物群处理对植物生长影响的数据：净整土反馈（共生体和拮抗体的综合作用）、从同种植物土壤中收集的丛枝菌根真菌（AMF）的反馈，以及与 Glomus etunicatum 的反馈，一种优势菌根真菌。我们发现净整土反馈和同种植物 AMF 反馈中都存在系统发育信号；保守性在本地植物中尤为强烈，但在外来植物中不存在。野外植物的丰度也受到保守，这种模式是由植物对土壤生物群的共同反应所决定的。我们的结论是，土壤生物群会影响自然界中密切相关植物亲属的丰度。
