The return of the variance: intraspecific variability in community ecology

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• 作者：Cyrille Violle¹ ; ² ; ^{cyrille.violle@cefe.cnrs.fr} ; Brian J. Enquist¹ ; ³ ; Brian J. McGill⁴ ; Lin Jiang⁵ ; Cé ; cile H. Albert⁶ ; ⁷ ; Catherine Hulshof¹ ; Vincent Jung⁸ ; ⁹ ; Julie Messier¹
• 关键词：community assembly ; functional trait ; intraspecific variation ; mean field approach ; species coexistence ; species diversity ; T-statistics ; variance
• 刊名：Trends in Ecology and Evolution
• 出版年：2012
• 期刊代码：148_01695347
• 类别：bio
• 出版时间：April, 2012
• 卷：27
• 期：4
• 页码：244-252
• 文件大小：544 K

摘要

Despite being recognized as a promoter of diversity and a condition for local coexistence decades ago, the importance of intraspecific variance has been neglected over time in community ecology. Recently, there has been a new emphasis on intraspecific variability. Indeed, recent developments in trait-based community ecology have underlined the need to integrate variation at both the intraspecific as well as interspecific level. We introduce new T-statistics (鈥楾鈥?for trait), based on the comparison of intraspecific and interspecific variances of functional traits across organizational levels, to operationally incorporate intraspecific variability into community ecology theory. We show that a focus on the distribution of traits at local and regional scales combined with original analytical tools can provide unique insights into the primary forces structuring communities.