Functional diversity (FD), species richness and community composition
Functional diversity (FD), species richness and community composition
复制标题
DOI：
10.1046/j.1461-0248.2002.00339.x
复制
发表时间：
2002-05-01
期刊：
影响因子：
8.8
通讯作者：
Gaston, KJ
中科院分区：
文献类型：
--
作者：
Petchey, OL;Gaston, KJ
功能多样性是生物多样性的重要组成部分，但与分类多样性相比，功能多样性的量化方法还不够完善。在这里，我们提出了一种手段，用于量化功能多样性，可能是特别有用的，以确定功能多样性是如何与生态系统功能。这种功能多样性的量度“FD”被定义为功能树状图的总分支长度。FD的各种特征使其优于功能多样性的其他措施，如社区中功能组的数量。模拟物种的性状值说明了丰富度和组成对FD的相对重要性如何取决于物种分离的性状空间的有效维数。更少的维度增加了社区组成和功能冗余的重要性。更多的维度增加了物种丰富度的重要性，减少了功能冗余。集群的物种在性状空间增加了相对重要性的社区组成。五个自然群落表现出非常相似的FD和物种丰富度之间的关系。
Functional diversity is an important component of biodiversity, yet in comparison to taxonomic diversity, methods of quantifying functional diversity are less well developed. Here, we propose a means for quantifying functional diversity that may be particularly useful for determining how functional diversity is related to ecosystem functioning. This measure of functional diversity "FD" is defined as the total branch length of a functional dendrogram. Various characteristics of FD make it preferable to other measures of functional diversity, such as the number of functional groups in a community. Simulating species' trait values illustrates how the relative importance of richness and composition for FD depends on the effective dimensionality of the trait space in which species separate. Fewer dimensions increase the importance of community composition and functional redundancy. More dimensions increase the importance of species richness and decreases functional redundancy. Clumping of species in trait space increases the relative importance of community composition. Five natural communities show remarkably similar relationships between FD and species richness.