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首页> 外文期刊>Oecologia >Individual species affect plant traits structure in their surroundings: evidence of functional mechanisms of assembly
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Individual species affect plant traits structure in their surroundings: evidence of functional mechanisms of assembly

机译：单个物种影响其周围环境的植物性状结构：组装功能机制的证据

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摘要

Evaluating community assembly through the use of functional traits is a promising tool for testing predictions arising from Niche and Coexistence theories. Although interactions among neighboring species and their inter-specific differences are known drivers of coexistence with a strong spatial signal, assessing the role of individual species on the functional structure of the community at different spatial scales remains a challenge. Here, we ask whether individual species exert a measurable effect on the spatial organization of different functional traits in local assemblages. We first propose and compute two functions that describe different aspects of functional trait organization around individual species at multiple scales: individual weighted mean area relationship and individual functional diversity area relationship. Secondly, we develop a conceptual model on the relationship and simultaneous variation of these two metrics, providing five alternative scenarios in response to the ability of some target species to modify its neighbor environment and the possible assembly mechanisms involved. Our results show that some species influence the spatial structure of specific functional traits, but their effects were always restricted to the finest spatial scales. In the basis of our conceptual model, the observed patterns point to two main mechanisms driving the functional structure of the community at the fine scale, "biotic" filtering meditated by individual species and resource partitioning driven by indirect facilitation rather than by competitive mechanisms.
机译：通过使用功能特征评估社区集会是一种有前途的工具，可用于测试由利基和共存理论产生的预测。尽管已知相邻物种之间的相互作用及其种间差异与强烈的空间信号共存，但是在不同空间尺度上评估单个物种在社区功能结构上的作用仍然是一个挑战。在这里，我们询问单个物种是否对本地组合中不同功能性状的空间组织产生了可测量的影响。我们首先提出并计算两个函数，这些函数描述了在多个尺度上围绕单个物种的功能性状组织的不同方面：个体加权平均面积关系和个体功能多样性面积关系。其次，我们针对这两个指标的关系和同时变化开发了一个概念模型，针对某些目标物种修改其邻域环境的能力以及可能涉及的组装机制，提供了五种替代方案。我们的结果表明，某些物种会影响特定功能性状的空间结构，但它们的作用始终仅限于最佳的空间尺度。在我们的概念模型的基础上，观察到的模式指向了在精细尺度上驱动社区功能结构的两个主要机制，即由个体物种冥想的“生物”过滤和间接促进而非竞争机制驱动的资源分配。

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