Dissecting Solidago canadensis-soil feedback in its real invasion.
Dissecting Solidago canadensis-soil feedback in its real invasion.
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DOI：
10.1002/ece3.2743
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发表时间：
2017-04
影响因子：
2.6
通讯作者：
He WM
中科院分区：
文献类型：
--
作者：
Dong LJ;Yang JX;Yu HW;He WM
植物-土壤反馈(PSF)的重要性早已被认识到，但目前对PSF模式及其相关机制的认识主要来源于实验室实验。我们的目的是解决PSF对群落性能的影响及其决定因素，使用入侵的加拿大一枝黄花。为此，我们调查了81对入侵和未入侵的地块，收集了这些成对地块的土壤样本，并进行了微型植物群落的实验。加拿大链霉菌对土壤非生物性质和土壤生物性质的调节作用大小相似，但方向相反；改变的非生物和生物性质对后续加拿大链霉菌群落的产量及其丰富度的影响相似。这些过程在群落水平上形成了中性的加拿大黄花-土壤反馈效应。此外，在无土壤反馈和存在土壤反馈的情况下，加拿大沙打旺的相对优势度随着其竞争抑制能力的增强而增加，而加拿大沙打旺诱导的本地植物种类减少并不直接改变土壤性质。这些发现为理解PSF效应和实地条件下的相关机制提供了基础，也突显了从整体上考虑PSF的重要性。
The importance of plant–soil feedback (PSF) has long been recognized, but the current knowledge on PSF patterns and the related mechanisms mainly stems from laboratory experiments. We aimed at addressing PSF effects on community performance and their determinants using an invasive forb Solidago canadensis. To do so, we surveyed 81 pairs of invaded versus uninvaded plots, collected soil samples from these pairwise plots, and performed an experiment with microcosm plant communities. The magnitudes of conditioning soil abiotic properties and soil biotic properties by S. canadensis were similar, but the direction was opposite; altered abiotic and biotic properties influenced the production of subsequent S. canadensis communities and its abundance similarly. These processes shaped neutral S. canadensis–soil feedback effects at the community level. Additionally, the relative dominance of S. canadensis increased with its ability of competitive suppression in the absence and presence of S. canadensis–soil feedbacks, and S. canadensis‐induced decreases in native plant species did not alter soil properties directly. These findings provide a basis for understanding PSF effects and the related mechanisms in the field conditions and also highlight the importance of considering PSFs holistically.