DOI: 10.1111/gcb.12988
论文题名: The success of assisted colonization and assisted gene flow depends on phenology
作者: Wadgymar S.M. ; Cumming M.N. ; Weis A.E.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 10 起始页码: 3786
结束页码: 3799
语种: 英语
英文关键词: Chamaecrista fasciculata
; Climate change
; Flowering time
; Fruiting time
; Growing degree days
; Natural selection
; Phenology
; Plasticity
Scopus关键词: climate change
; colonization
; evolutionary biology
; flowering
; fruiting
; gene flow
; legume
; natural selection
; phenology
; phenotypic plasticity
; population genetics
; Chamaecrista fasciculata
; Chamaecrista
; gene flow
; genetic selection
; genetics
; greenhouse effect
; growth, development and aging
; Ontario
; phenotype
; physiology
; plant dispersal
; United States
; Chamaecrista
; Gene Flow
; Global Warming
; Ontario
; Phenotype
; Plant Dispersal
; Selection, Genetic
; United States
英文摘要: Global warming will jeopardize the persistence and genetic diversity of many species. Assisted colonization, or the movement of species beyond their current range boundary, is a conservation strategy proposed for species with limited dispersal abilities or adaptive potential. However, species that rely on photoperiodic and thermal cues for development may experience conflicting signals if transported across latitudes. Relocating multiple, distinct populations may remedy this quandary by expanding genetic variation and promoting evolutionary responses in the receiving habitat - a strategy known as assisted gene flow. To better inform these policies, we planted seeds from latitudinally distinct populations of the annual legume, Chamaecrista fasciculata, in a potential future colonization site north of its current range boundary. Plants were exposed to ambient or elevated temperatures via infrared heating. We monitored several life history traits and estimated patterns of natural selection to determine the adaptive value of plastic responses. To assess the feasibility of assisted gene flow between phenologically distinct populations, we counted flowers each day and estimated the degree of temporal isolation between populations. Increased temperatures advanced each successive phenological trait more than the last, resulting in a compressed life cycle for all but the southern-most population. Warming altered patterns of selection on flowering onset and vegetative biomass. Population performance was dependent on latitude of origin, with the northern-most population performing best under ambient conditions and the southern-most performing most poorly, even under elevated temperatures. Among-population differences in flowering phenology limited the potential for genetic exchange among the northern- and southern-most populations. All plastic responses to warming were neutral or adaptive; however, photoperiodic constraints will likely necessitate evolutionary responses for long-term persistence, especially when involving populations from disparate latitudes. With strategic planning, our results suggest that assisted colonization and assisted gene flow may be feasible options for preservation. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61559
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology and Evolutionary Biology, University of Toronto, 25 Willcocks Street, Toronto, ON, Canada
Recommended Citation:
Wadgymar S.M.,Cumming M.N.,Weis A.E.. The success of assisted colonization and assisted gene flow depends on phenology[J]. Global Change Biology,2015-01-01,21(10)