气候变化领域集成服务门户(CCPortal): Impact of Environmental Conditions on Wood Anatomical Traits of Green Alder (Alnus alnobetula) at the Alpine Treeline

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DOI	10.3390/f15010024
	Impact of Environmental Conditions on Wood Anatomical Traits of Green Alder (Alnus alnobetula) at the Alpine Treeline
	Gruber, Andreas; Wieser, Gerhard; Fink, Marion; Oberhuber, Walter; Messaoud, Yassine; Svetlik, Jan; Alberti, Giorgio
发表日期	2024
EISSN	1999-4907
起始页码	15
结束页码	1
卷号	15 期号:1
英文摘要	Due to land use change, green alder (Alnus alnobetula), formerly restricted to moist slopes, is now expanding to drier sun-exposed sites at the alpine treeline. The highly productive shrub is forming closed thickets, establishing nitrogen-saturated species poor shrublands. To evaluate wood anatomical adaptations to changing environmental conditions, we analyzed vessel characteristics (mean vessel area, MVA; vessel density, VD; and theoretic conductive area, TCA) and axial parenchyma abundance, as well as their distribution in the annual ring at a moist north-facing and a dry south-facing site at the alpine treeline on Mt. Patscherkofel (Central European Alps, Austria). Results revealed that lower soil water availability and enhanced evaporative demand did not affect MVA while VD and TCA were significantly reduced at the dry south-facing site. This suggests that in green alder, vessel size is a static trait whereas vessel number responds plastic. Limited water availability also triggered a significant increase in axial parenchyma, confirming the important role of xylem parenchyma in water relations. Harsh environmental conditions at the distributional limit of green alder may have affected xylogenesis, leading to a near semi-ring-porous distribution of vessels and an accumulation of parenchyma in the late growing season. We conclude that in a warmer and drier climate, growth limitation and physiological stress may set limits to the distribution of Alnus alnobetula at drought-prone sites in the alpine treeline ecotone.
英文关键词	alpine treeline ecotone; global change; green alder; phenotypic plasticity; xylem anatomy; xylem parenchyma
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:001151899100001
来源期刊	FORESTS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/298202
作者单位	University of Innsbruck
推荐引用方式 GB/T 7714	Gruber, Andreas,Wieser, Gerhard,Fink, Marion,et al. Impact of Environmental Conditions on Wood Anatomical Traits of Green Alder (Alnus alnobetula) at the Alpine Treeline[J],2024,15(1).
APA	Gruber, Andreas.,Wieser, Gerhard.,Fink, Marion.,Oberhuber, Walter.,Messaoud, Yassine.,...&Alberti, Giorgio.(2024).Impact of Environmental Conditions on Wood Anatomical Traits of Green Alder (Alnus alnobetula) at the Alpine Treeline.FORESTS,15(1).
MLA	Gruber, Andreas,et al."Impact of Environmental Conditions on Wood Anatomical Traits of Green Alder (Alnus alnobetula) at the Alpine Treeline".FORESTS 15.1(2024).