globalchange  > 气候变化事实与影响
DOI: 10.1111/gcb.14525
WOS记录号: WOS:000459456700014
论文题名:
A natural heating experiment: Phenotypic and genotypic responses of plant phenology to geothermal soil warming
作者: Valdes, Alicia1,2; Marteinsdottir, Bryndis3; Ehrlen, Johan1,2
通讯作者: Valdes, Alicia
刊名: GLOBAL CHANGE BIOLOGY
ISSN: 1354-1013
EISSN: 1365-2486
出版年: 2019
卷: 25, 期:3, 页码:954-962
语种: 英语
英文关键词: climatic variation ; geothermal ecosystems ; Iceland ; local adaptation ; microclimate ; phenotypic plasticity ; phenotypic selection ; plant phenology
WOS关键词: CLIMATE-CHANGE ; FLOWERING TIME ; GENE FLOW ; POPULATION DIFFERENTIATION ; EVOLUTIONARY SIGNIFICANCE ; LOCAL ADAPTATION ; SELECTION ; PLASTICITY ; CONSEQUENCES ; LABORATORIES
WOS学科分类: Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向: Biodiversity & Conservation ; Environmental Sciences & Ecology
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.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/130586
Appears in Collections:气候变化事实与影响

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作者单位: 1.Stockholm Univ, Dept Ecol Environm & Plant Sci, Stockholm, Sweden
2.Stockholm Univ, Bolin Ctr Climate Res, Stockholm, Sweden
3.Univ Iceland, Inst Life & Environm Sci, Reykjavik, Iceland

Recommended Citation:
Valdes, Alicia,Marteinsdottir, Bryndis,Ehrlen, Johan. A natural heating experiment: Phenotypic and genotypic responses of plant phenology to geothermal soil warming[J]. GLOBAL CHANGE BIOLOGY,2019-01-01,25(3):954-962
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