气候变化领域集成服务门户(CCPortal): Environmental and Biogeographic Drivers behind Alpine Plant Thermal Tolerance and Genetic Variation

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DOI	10.3390/plants13091271
	Environmental and Biogeographic Drivers behind Alpine Plant Thermal Tolerance and Genetic Variation
	Danzey, Lisa M.; Briceno, Veronica F.; Cook, Alicia M.; Nicotra, Adrienne B.; Peyre, Gwendolyn; Rossetto, Maurizio; Yap, Jia-Yee S.; Leigh, Andrea
发表日期	2024
ISSN	2223-7747
起始页码	13
结束页码	9
卷号	13 期号:9
英文摘要	In alpine ecosystems, elevation broadly functions as a steep thermal gradient, with plant communities exposed to regular fluctuations in hot and cold temperatures. These conditions lead to selective filtering, potentially contributing to species-level variation in thermal tolerance and population-level genetic divergence. Few studies have explored the breadth of alpine plant thermal tolerances across a thermal gradient or the underlying genetic variation thereof. We measured photosystem heat (Tcrit-hot) and cold (Tcrit-cold) thresholds of ten Australian alpine species across elevation gradients and characterised their neutral genetic variation. To reveal the biogeographical drivers of present-day genetic signatures, we also reconstructed temporal changes in habitat suitability across potential distributional ranges. We found intraspecific variation in thermal thresholds, but this was not associated with elevation, nor underpinned by genetic differentiation on a local scale. Instead, regional population differentiation and considerable homozygosity within populations may, in part, be driven by distributional contractions, long-term persistence, and migrations following habitat suitability. Our habitat suitability models suggest that cool-climate-distributed alpine plants may be threatened by a warming climate. Yet, the observed wide thermal tolerances did not reflect this vulnerability. Conservation efforts should seek to understand variations in species-level thermal tolerance across alpine microclimates.
英文关键词	evolutionary ecology; heat tolerance; cold tolerance; landscape genetics; species distribution models; last glacial maximum
语种	英语
WOS研究方向	Plant Sciences
WOS类目	Plant Sciences
WOS记录号	WOS:001219821200001
来源期刊	PLANTS-BASEL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/296066
作者单位	University of Technology Sydney; Australian National University; Universidad de los Andes (Colombia); University of Queensland
推荐引用方式 GB/T 7714	Danzey, Lisa M.,Briceno, Veronica F.,Cook, Alicia M.,et al. Environmental and Biogeographic Drivers behind Alpine Plant Thermal Tolerance and Genetic Variation[J],2024,13(9).
APA	Danzey, Lisa M..,Briceno, Veronica F..,Cook, Alicia M..,Nicotra, Adrienne B..,Peyre, Gwendolyn.,...&Leigh, Andrea.(2024).Environmental and Biogeographic Drivers behind Alpine Plant Thermal Tolerance and Genetic Variation.PLANTS-BASEL,13(9).
MLA	Danzey, Lisa M.,et al."Environmental and Biogeographic Drivers behind Alpine Plant Thermal Tolerance and Genetic Variation".PLANTS-BASEL 13.9(2024).