A trait-based approach to community assembly: partitioning of species trait values into within- and among-community components
A trait-based approach to community assembly: partitioning of species trait values into within- and among-community components
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DOI：
10.1111/j.1461-0248.2006.01006.x
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发表时间：
2007-02-01
期刊：
影响因子：
8.8
通讯作者：
Cornwell, W. K.
中科院分区：
文献类型：
--
作者：
Ackerly, D. D.;Cornwell, W. K.
植物的功能性状在不同的环境梯度和不同的物种之间都存在差异，这给功能生态学和群落生态学的综合带来了挑战。我们提出了一种基于性状的方法，将物种的性状值加性分解为α和β分量：β值指的是物种在由群落水平平均性状值定义的梯度上的位置；Alpha值是一个物种的特征值与共发生分类群的平均值之间的差值。在加利福尼亚沿海木本植物群落中，比叶面积、叶大小、木材密度和最大高度的β性状值均呈强烈的共变，反映了物种在土壤水分有效度梯度上的分布。另一方面，Alpha值一般不显着相关，表明群落内部有几个独立的分化轴。这种基于性状的框架为功能生态学和梯度分析与群落生态学和共存理论相结合提供了一种新的途径。
Plant functional traits vary both along environmental gradients and among species occupying similar conditions, creating a challenge for the synthesis of functional and community ecology. We present a trait-based approach that provides an additive decomposition of species' trait values into alpha and beta components: beta values refer to a species' position along a gradient defined by community-level mean trait values; alpha values are the difference between a species' trait values and the mean of co-occurring taxa. In woody plant communities of coastal California, beta trait values for specific leaf area, leaf size, wood density and maximum height all covary strongly, reflecting species distributions across a gradient of soil moisture availability. Alpha values, on the other hand, are generally not significantly correlated, suggesting several independent axes of differentiation within communities. This trait-based framework provides a novel approach to integrate functional ecology and gradient analysis with community ecology and coexistence theory.