DOI: 10.1111/gcb.14525
Scopus记录号: 2-s2.0-85058405700
论文题名: A natural heating experiment: Phenotypic and genotypic responses of plant phenology to geothermal soil warming
作者: Valdés A. ; Marteinsdóttir B. ; Ehrlén J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2019
卷: 25, 期: 3 起始页码: 954
结束页码: 962
语种: 英语
英文关键词: climatic variation
; geothermal ecosystems
; Iceland
; local adaptation
; microclimate
; phenotypic plasticity
; phenotypic selection
; plant phenology
Scopus关键词: Cerastium fontanum
英文摘要: Under global warming, the survival of many populations of sedentary organisms in seasonal environments will largely depend on their ability to cope with warming in situ by means of phenotypic plasticity or adaptive evolution. This is particularly true in high-latitude environments, where current growing seasons are short, and expected temperature increases large. In such short-growing season environments, the timing of growth and reproduction is critical to survival. Here, we use the unique setting provided by a natural geothermal soil warming gradient (Hengill geothermal area, Iceland) to study the response of Cerastium fontanum flowering phenology to temperature. We hypothesized that trait expression and phenotypic selection on flowering phenology are related to soil temperature, and tested the hypothesis that temperature-driven differences in selection on phenology have resulted in genetic differentiation using a common garden experiment. In the field, phenology was related to soil temperature, with plants in warmer microsites flowering earlier than plants at colder microsites. In the common garden, plants responded to spring warming in a counter-gradient fashion; plants originating from warmer microsites flowered relatively later than those originating from colder microsites. A likely explanation for this pattern is that plants from colder microsites have been selected to compensate for the shorter growing season by starting development at lower temperatures. However, in our study we did not find evidence of variation in phenotypic selection on phenology in relation to temperature, but selection consistently favoured early flowering. Our results show that soil temperature influences trait expression and suggest the existence of genetically based variation in flowering phenology leading to counter-gradient local adaptation along a gradient of soil temperatures. An important implication of our results is that observed phenotypic responses of phenology to global warming might often be a combination of short-term plastic responses and long-term evolutionary responses, acting in different directions. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117494
Appears in Collections: 气候变化与战略
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Recommended Citation:
Valdés A.,Marteinsdóttir B.,Ehrlén J.. A natural heating experiment: Phenotypic and genotypic responses of plant phenology to geothermal soil warming[J]. Global Change Biology,2019-01-01,25(3)