DOI: 10.1111/ele.12781
Scopus记录号: 2-s2.0-85019267912
论文题名: Constraints on trait combinations explain climatic drivers of biodiversity: the importance of trait covariance in community assembly
作者: Dwyer J.M. ; Laughlin D.C.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2017
卷: 20, 期: 7 起始页码: 872
结束页码: 882
语种: 英语
英文关键词: Aridity
; functional traits
; habitat filtering
; species richness
; winter annual
; York gum woodlands
Scopus关键词: biodiversity
; plant
; plant seed
; Biodiversity
; Plants
; Seeds
英文摘要: Trade-offs maintain diversity and structure communities along environmental gradients. Theory indicates that if covariance among functional traits sets a limit on the number of viable trait combinations in a given environment, then communities with strong multidimensional trait constraints should exhibit low species diversity. We tested this prediction in winter annual plant assemblages along an aridity gradient using multilevel structural equation modelling. Univariate and multivariate functional diversity measures were poorly explained by aridity, and were surprisingly poor predictors of community richness. By contrast, the covariance between maximum height and seed mass strengthened along the aridity gradient, and was strongly associated with richness declines. Community richness had a positive effect on local neighbourhood richness, indicating that climate effects on trait covariance indirectly influence diversity at local scales. We present clear empirical evidence that declines in species richness along gradients of environmental stress can be due to increasing constraints on multidimensional phenotypes. © 2017 John Wiley & Sons Ltd/CNRS Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107599
Appears in Collections: 气候减缓与适应
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作者单位: School of Biological Sciences, The University of Queensland, St Lucia, Brisbane, QLD, Australia; Ecosciences Precinct, CSIRO Land and Water, Dutton Park, Brisbane, QLD, Australia; Environmental Research Institute and School of Science, University of Waikato, Hamilton, New Zealand; Department of Botany, University of Wyoming, 1000 East University Dr., Laramie, WY, United States
Recommended Citation:
Dwyer J.M.,Laughlin D.C.. Constraints on trait combinations explain climatic drivers of biodiversity: the importance of trait covariance in community assembly[J]. Ecology Letters,2017-01-01,20(7)