气候变化领域集成服务门户(CCPortal): No effect of snow on shrub xylem traits: Insights from a snow-manipulation experiment on Disko Island, Greenland

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DOI	10.1016/j.scitotenv.2024.169896
	No effect of snow on shrub xylem traits: Insights from a snow-manipulation experiment on Disko Island, Greenland
	Power, Candice C.; Normand, Signe; von Arx, Georg; Elberling, Bo; Corcoran, Derek; Krog, Amanda B.; Bouvin, Nana Knakkergaard; Treier, Urs Albert; Westergaard-Nielsen, Andreas; Liu, Yijing; Prendin, Angela L.
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	916
卷号	916
英文摘要	Widespread shrubification across the Arctic has been generally attributed to increasing air temperatures, but responses vary across species and sites. Wood structures related to the plant hydraulic architecture may respond to local environmental conditions and potentially impact shrub growth, but these relationships remain understudied. Using methods of dendroanatomy, we analysed shrub ring width (RW) and xylem anatomical traits of 80 individuals of Salix glauca L. and Betula nana L. at a snow manipulation experiment in Western Greenland. We assessed how their responses differed between treatments (increased versus ambient snow depth) and soil moisture regimes (wet and dry). Despite an increase in snow depth due to snow fences (28-39 %), neither RW nor anatomical traits in either species showed significant responses to this increase. In contrast, irrespective of the snow treatment, the xylem specific hydraulic conductivity (Ks) and earlywood vessel size (LA95) for the study period were larger in S. glauca (p < 0.1, p < 0.01) and B. nana (p < 0.01, p < 0.001) at the wet than the dry site, while both species had larger vessel groups at the dry than the wet site (p < 0.01). RW of B. nana was higher at the wet site (p < 0.01), but no differences were observed for S. glauca. Additionally, B. nana Ks and LA95 showed different trends over the study period, with decreases observed at the dry site (p < 0.001), while for other responses no difference was observed. Our results indicate that, taking into account ontogenetic and allometric trends, hydraulic related xylem traits of both species, along with B. nana growth, were influenced by soil moisture. These findings suggest that soil moisture regime, but not snow cover, may determine xylem responses to future climate change and thus add to the heterogeneity of Arctic shrub dynamics, though more longterm species- and site- specific studies are needed.
英文关键词	Arctic shrubs; Dendroecology; Quantitative wood anatomy; Snow fence; Soil moisture; Vessels
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001175820100001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/290877
作者单位	Aarhus University; Aarhus University; Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research; University of Bern; University of Copenhagen; University of Copenhagen; University of Padua
推荐引用方式 GB/T 7714	Power, Candice C.,Normand, Signe,von Arx, Georg,et al. No effect of snow on shrub xylem traits: Insights from a snow-manipulation experiment on Disko Island, Greenland[J],2024,916.
APA	Power, Candice C..,Normand, Signe.,von Arx, Georg.,Elberling, Bo.,Corcoran, Derek.,...&Prendin, Angela L..(2024).No effect of snow on shrub xylem traits: Insights from a snow-manipulation experiment on Disko Island, Greenland.SCIENCE OF THE TOTAL ENVIRONMENT,916.
MLA	Power, Candice C.,et al."No effect of snow on shrub xylem traits: Insights from a snow-manipulation experiment on Disko Island, Greenland".SCIENCE OF THE TOTAL ENVIRONMENT 916(2024).