DOI: 10.1111/ele.12618
Scopus记录号: 2-s2.0-84973397923
论文题名: How variation between individuals affects species coexistence
作者: Hart S.P. ; Schreiber S.J. ; Levine J.M.
刊名: Ecology Letters
ISSN: 1461023X
EISSN: 1461-0248
出版年: 2016
语种: 英语
英文关键词: Community assembly
; Competition
; Demographic heterogeneity
; Demographic stochasticity
; Functional traits
; Genetic diversity
; Individual variation
; Intraspecific variation
; Nonlinear averaging
; Species coexistence
Scopus关键词: annual variation
; coexistence
; competition (ecology)
; competitive ability
; demography
; differentiation
; ecological modeling
; genetic variation
; heterogeneity
; intraspecific variation
; species diversity
; stochasticity
; adaptation
; animal
; biological model
; competitive behavior
; ecosystem
; population dynamics
; species difference
; Adaptation, Physiological
; Animals
; Competitive Behavior
; Ecosystem
; Models, Biological
; Population Dynamics
; Species Specificity
英文摘要: Although the effects of variation between individuals within species are traditionally ignored in studies of species coexistence, the magnitude of intraspecific variation in nature is forcing ecologists to reconsider. Compelling intuitive arguments suggest that individual variation may provide a previously unrecognised route to diversity maintenance by blurring species-level competitive differences or substituting for species-level niche differences. These arguments, which are motivating a large body of empirical work, have rarely been evaluated with quantitative theory. Here we incorporate intraspecific variation into a common model of competition and identify three pathways by which this variation affects coexistence: (1) changes in competitive dynamics because of nonlinear averaging, (2) changes in species' mean interaction strengths because of variation in underlying traits (also via nonlinear averaging) and (3) effects on stochastic demography. As a consequence of the first two mechanisms, we find that intraspecific variation in competitive ability increases the dominance of superior competitors, and intraspecific niche variation reduces species-level niche differentiation, both of which make coexistence more difficult. In addition, individual variation can exacerbate the effects of demographic stochasticity, and this further destabilises coexistence. Our work provides a theoretical foundation for emerging empirical interests in the effects of intraspecific variation on species diversity. © 2016 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/107823
Appears in Collections: 气候减缓与适应
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作者单位: Institute of Integrative Biology ETH Zürich (Swiss Federal Institute of Technology) Universitätrasse 16 8092 Zürich Switzerland; Department of Evolution and Ecology and the Center for Population Biology One Shields Avenue University of California Davis 95616CA USA
Recommended Citation:
Hart S.P.,Schreiber S.J.,Levine J.M.. How variation between individuals affects species coexistence[J]. Ecology Letters,2016-01-01