气候变化领域集成服务门户(CCPortal): Spatiotemporal patterns of microclimatic buffering in relict alpine communities

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DOI	10.1111/jvs.13242
	Spatiotemporal patterns of microclimatic buffering in relict alpine communities
	Jimenez-Alfaro, Borja; Fernandez-Pascual, Eduardo; Espinosa Del Alba, Clara; Marceno, Corrado
发表日期	2024
ISSN	1100-9233
EISSN	1654-1103
起始页码	35
结束页码	2
卷号	35 期号:2
英文摘要	QuestionsIn alpine landscapes, topography creates a mosaic of microclimatic niches that might prevent local extinctions, but the influence of this spatial heterogeneity on plant communities is largely unknown. Here we ask (1) how soil microclimatic variation is comparable at temporal and spatial scales, and (2) how such variation influences species composition and local extinctions in relict alpine communities.LocationPicos de Europa National Park, northern Spain.MethodsWe resurveyed permanent plots in four alpine sites following the recording of soil temperatures (temporal survey) for 10 years. We then sampled the spatial variation in species composition and microclimatic temperatures in 80 plots around the permanent plots (spatial survey). We evaluated the variation of six microclimatic indices between the temporal and the spatial surveys, and calculated the temporal trends observed in species cover. We finally predicted local extinction rates under microclimatic scenarios based on the observed microclimate-community relations.ResultsDespite high interannual variation, we found a 10-year trend of temperature warming on (microridge) fellfields and (microvalley) snowbeds. Microclimatic variation was larger in space than in time, with little temperature variation in snowbeds and extreme low temperatures recorded in fellfields. Species composition was mainly influenced by growing degree days (GDD) and freezing degree days (FDD), which were both related to snow cover duration. Plant cover of 16 species (out of 36 frequent species) showed significant responses to microclimatic variation. Local extinctions were mainly predicted under relatively hotter and more freezing conditions.ConclusionsOur results support the idea that microclimatic spatial heterogeneity can reduce the negative influence of climate change on alpine plant communities. However, a continuous reduction of snow cover will result in a tipping point beyond which the buffer effect of this spatial heterogeneity will not be effective in protected microsites, leading to community homogenization. This process may have started in relict alpine communities where species from snowy microclimates are being outcompeted by species adapted to below-zero winter temperatures. We investigated the variation of soil microclimate in time and space in a relict alpine system of northern Spain. Spatial microclimatic variation in one year was higher than in 10 years of microclimate monitoring in permanent plots, supporting the buffer effect of topography in alpine landscapes. Protected sites with relatively longer snow cover are key microclimatic refugia for preventing local extinctions.image
英文关键词	alpine vegetation; climate warming; microclimate; microrefugia; snow cover; temporal change; thermophilization; topography
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:001181626500001
来源期刊	JOURNAL OF VEGETATION SCIENCE
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/291436
作者单位	Consejo Superior de Investigaciones Cientificas (CSIC); University of Oviedo; University of Perugia
推荐引用方式 GB/T 7714	Jimenez-Alfaro, Borja,Fernandez-Pascual, Eduardo,Espinosa Del Alba, Clara,et al. Spatiotemporal patterns of microclimatic buffering in relict alpine communities[J],2024,35(2).
APA	Jimenez-Alfaro, Borja,Fernandez-Pascual, Eduardo,Espinosa Del Alba, Clara,&Marceno, Corrado.(2024).Spatiotemporal patterns of microclimatic buffering in relict alpine communities.JOURNAL OF VEGETATION SCIENCE,35(2).
MLA	Jimenez-Alfaro, Borja,et al."Spatiotemporal patterns of microclimatic buffering in relict alpine communities".JOURNAL OF VEGETATION SCIENCE 35.2(2024).