DOI: 10.1111/ele.13461
论文题名: Optimal germination timing in unpredictable environments: the importance of dormancy for both among- and within-season variation
作者: ten Brink H. ; Gremer J.R. ; Kokko H.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2020
卷: 23, 期: 4 起始页码: 620
结束页码: 630
语种: 英语
中文关键词: Bet hedging
; competition
; desert annuals
; dormancy
; environmental variation
; evolution
; germination phenology
英文关键词: climate
; germination
; phenotype
; plant
; plant seed
; season
; Climate
; Germination
; Phenotype
; Plants
; Seasons
; Seeds
英文摘要: For organisms living in unpredictable environments, timing important life-history events is challenging. One way to deal with uncertainty is to spread the emergence of offspring across multiple years via dormancy. However, timing of emergence is not only important among years, but also within each growing season. Here, we study the evolutionary interactions between germination strategies that deal with among- and within-season uncertainty. We use a modelling approach that considers among-season dormancy and within-season germination phenology of annual plants as potentially independent traits and study their separate and joint evolution in a variable environment. We find that higher among-season dormancy selects for earlier germination within the growing season. Furthermore, our results indicate that more unpredictable natural environments can counter-intuitively select for less risk-spreading within the season. Furthermore, strong priority effects select for earlier within-season germination phenology which in turn increases the need for bet hedging through among-season dormancy. © 2020 The Authors. Ecology Letters published by CNRS and John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166732
Appears in Collections: 气候变化与战略
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作者单位: Department of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, Zurich, CH-8057, Switzerland; Department of Evolution and Ecology, University of California, Davis, CA 95616, United States
Recommended Citation:
ten Brink H.,Gremer J.R.,Kokko H.. Optimal germination timing in unpredictable environments: the importance of dormancy for both among- and within-season variation[J]. Ecology Letters,2020-01-01,23(4)