气候变化领域集成服务门户(CCPortal): Warming menaces high-altitude Himalayan birch forests: Evidence from cambial phenology and wood anatomy

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DOI	10.1016/j.agrformet.2021.108577
	Warming menaces high-altitude Himalayan birch forests: Evidence from cambial phenology and wood anatomy
	Li, Xiaoxia; Rossi, Sergio; Sigdel, Shalik Ram; Dawadi, Binod; Liang, Eryuan
通讯作者	Liang, EY (通讯作者)
发表日期	2021
ISSN	0168-1923
EISSN	1873-2240
卷号	308
英文摘要	The Himalayas are experiencing dramatic warming and drought events, which occur at a faster rate than the global average. How will the high-elevation ecosystems cope with such changing conditions? This study aims to combine cambial phenology with quantitative wood anatomy to understand how the growth dynamics affect the trade-off between safety and efficiency of water transport in the Himalayan forests. We investigated the timing of xylogenesis and its relationship with hydraulic wood anatomical traits in Himalayan birch (Betula utilis D. Don) at two altitudes in the central Himalayas. Xylogenesis was monitored weekly from April to September 2014 by collecting microcores. We measured vessel area on histological sections, calculated the hydraulic diameter, and assessed the effects of climate on xylem production rate. Xylogenesis occurred from June to September in both study sites. Moisture availability influenced positively xylem growth besides thermal conditions. The onset and duration of vessel enlargement were correlated with the hydraulic diameter. Trees with earlier onsets and longer durations of vessel enlargement exhibited larger hydraulic diameters. The close relationship between cambial phenology and hydraulic diameter suggests that earlier growth resumption induced by climate changes may result in larger vessels, which are more efficient in water transport, but vulnerable to drought-induced cavitation. The ongoing warming and drying climate conditions may menace the survival of birch forest in the central Himalayas.
关键词	EARLYWOOD VESSELS GROWTH DECLINE EUROPEAN BEECH BETULA-UTILIS TREE-RINGS PRECIPITATION XYLOGENESIS DROUGHT CLIMATE TEMPERATURE
英文关键词	Tree ring; Xylem formation; Cambium; Xylem anatomy; Xylogenesis; Hydraulic traits
语种	英语
WOS研究方向	Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
WOS类目	Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000692679900038
来源期刊	AGRICULTURAL AND FOREST METEOROLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260327
推荐引用方式 GB/T 7714	Li, Xiaoxia,Rossi, Sergio,Sigdel, Shalik Ram,et al. Warming menaces high-altitude Himalayan birch forests: Evidence from cambial phenology and wood anatomy[J]. 中国科学院青藏高原研究所,2021,308.
APA	Li, Xiaoxia,Rossi, Sergio,Sigdel, Shalik Ram,Dawadi, Binod,&Liang, Eryuan.(2021).Warming menaces high-altitude Himalayan birch forests: Evidence from cambial phenology and wood anatomy.AGRICULTURAL AND FOREST METEOROLOGY,308.
MLA	Li, Xiaoxia,et al."Warming menaces high-altitude Himalayan birch forests: Evidence from cambial phenology and wood anatomy".AGRICULTURAL AND FOREST METEOROLOGY 308(2021).