Relationships between plant–soil feedbacks and functional traits
Relationships between plant–soil feedbacks and functional traits
复制标题
DOI：
10.1111/1365-2745.13731
复制
发表时间：
2021-05
影响因子：
5.5
通讯作者：
Nianxun Xi;P. Adler;Dong-wei Chen;Hangyu Wu;J. Catford;P. Bodegom;M. Bahn;K. Crawford;Chengjin Chu
中科院分区：
文献类型：
--
作者：
Nianxun Xi;P. Adler;Dong-wei Chen;Hangyu Wu;J. Catford;P. Bodegom;M. Bahn;K. Crawford;Chengjin Chu
植物-土壤反馈（PSF）和功能性状是两个活跃但理论上尚未很好整合的研究领域。然而，PSF和性状都受到生活史进化的影响，因此理论上两者应该是相关的。我们提供了一个概念框架，植物功能性状的两种类型的PSF指标，并假设个人PSF（植物性能在同种与异种土壤）应相关的快-慢性状谱，而成对PSF（个人反馈的两个物种生长在对方的土壤中的总和）应与性状相异性。我们通过编译两个数据集进行Meta分析来测试这些假设，一个数据集由个体PSF值和植物性状值（比叶面积，SLA;叶氮浓度，LNC;比根长，SRL;细根直径，FRD;株高;种子质量）组成，第二个数据集由成对PSF值和性状相异性组成。我们的Meta分析表明，个体PSF值在具有更大SLA，LNC和SRL的生长更快的物种中更负，支持生长-防御权衡假设。植物高度与个体PSF呈正相关，这可能是因为大型长寿植物比小型短命植物更能抵御病原体。我们还发现，种子较大的物种具有更多的阳性或较少的阴性PSF，可能反映了对土壤病原体的更大耐受性。性状不相似性与成对PSF的关系方向因性状一致性而异。SRL和FRD的差异与成对PSF呈负相关，而身高差异与成对PSF呈正相关。这种对比关系可能反映了性状相异性与生态位和适合度差异之间的明显联系。合成.我们的研究结果证明了PSF和基于性状的方法的整合如何促进植物群落生态学。
Plant–soil feedbacks (PSF) and functional traits are two active but not well theoretically integrated areas of research. However, PSF and traits are both affected by life‐history evolution, so the two should theoretically be related. We provide a conceptual framework to link plant functional traits to two types of PSF metrics, and hypothesize that individual PSF (plant performance in conspecific vs. heterospecific soil) should be related to the fast–slow trait spectrum, whereas pairwise PSF (the sum of the individual feedbacks for two species growing in each other's soils) should be related to trait dissimilarity. We performed meta‐analyses to test these hypotheses by compiling two datasets, one dataset consisting of individual PSF values and plant trait values (specific leaf area, SLA; leaf N concentration, LNC; specific root length, SRL; fine root diameter, FRD; plant height; seed mass), and the second consisting of pairwise PSF values and trait dissimilarity. Our meta‐analyses showed that individual PSF values were more negative in faster‐growing species with greater SLA, LNC and SRL, supporting the growth–defence trade‐off hypothesis. Plant height was positively correlated with individual PSF, perhaps because large, long‐lived plants defend against pathogens better than smaller, shorter‐lived plants. We also found that larger‐seeded species had more positive or less negative PSF, likely reflecting greater tolerance of soil pathogens. The direction of relationships between trait dissimilarity and pairwise PSF varied with trait identity. Dissimilarities in SRL and FRD were negatively correlated with pairwise PSF while height dissimilarity was positively correlated with pairwise PSF. The contrasting relationships may reflect distinct links between trait dissimilarity and niche and fitness differences. Synthesis. Our results demonstrate how an integration of PSF and trait‐based approaches can advance plant community ecology.