Wildfires are one of the major environmental concerns in Mediterranean ecosystems. Thus, many studies have addressed wildfire impacts on soil and vegetation in Mediterranean forests, but the linkages between these ecosystem compartments after fire are not well understood. The aim of this work is to analyze soil-vegetation relationships in Mediterranean burned forests as well as the consistency of these relationships among forests with different environmental conditions, at different times after fire, and among vegetation with different functional traits. Our results indicate that study site conditions play an important role in mediating soil-vegetation relationships. Likewise, we found that the nature of soil-vegetation relationships may vary over time as fire effects are less dominant in both ecosystem compartments. Despite this, we detected several common soil-vegetation relationships among study sites and times after fire. For instance, our results revealed that available P content and stoichiometry (C:P and N:P) were closely linked to vegetation growth, and particularly to the growth of trees. We found that enzymatic activities and microbial biomass were inversely related to vegetation growth rates, whereas the specific activities of soil enzymes were higher in the areas with more vegetation height and cover. Likewise, our results suggest that resprouters may influence soil properties more than seeders, the growth of seeders being more dependent on soil status. We provide pioneer insights into how vegetation is influenced by soil, and vice-versa, in Mediterranean burned areas. Our results reflect variability in soil-vegetation relationships among study sites and time after fire, but consistent patterns between soil properties and vegetation were also detected. Our research is highly relevant to advance in forest science and could be useful to achieve efficient post-fire management.

中文翻译：

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火灾后地中海森林中的土壤－植被关系

野火是地中海生态系统中主要的环境问题之一。因此，许多研究都针对野火对地中海森林中土壤和植被的影响，但是人们对火灾后这些生态系统区室之间的联系还知之甚少。这项工作的目的是分析地中海烧毁森林中的土壤－植被关系，以及这些关系在环境条件不同，火灾后不同时间以及具有不同功能性状的植被之间的一致性。我们的结果表明，研究地点的条件在调解土壤与植被之间的关系中起着重要作用。同样，我们发现土壤与植被的关系的性质可能会随着时间而变化，因为火势在两个生态系统区室中都不太占优势。尽管如此，我们在研究地点和火灾后的时间之间发现了几种常见的土壤－植被关系。例如，我们的结果表明，可用的P含量和化学计量比（C：P和N：P）与植被生长特别是树木的生长密切相关。我们发现酶活性和微生物生物量与植被生长速率成反比，而在植被高度和覆盖率更高的地区，土壤酶的比活较高。同样，我们的结果表明，繁殖者比播种者对土壤特性的影响更大，播种者的生长更多地取决于土壤状况。我们为地中海烧毁地区的植被如何受到土壤影响以及反之亦然提供了开创性的见识。我们的结果反映了研究地点之间土壤植被关系的变化和火灾后的时间，但是还发现了土壤特性和植被之间的一致模式。我们的研究与森林科学的发展高度相关，对实现高效的火灾后管理可能很有用。