Warming induced growth decline of Himalayan birch at its lower range edge in a semi-arid region of Trans-Himalaya, central Nepal

doi:10.1007/s11258-017-0716-z

	Warming induced growth decline of Himalayan birch at its lower range edge in a semi-arid region of Trans-Himalaya, central Nepal
	Tiwari, Achyut 1,2,3; Fan, Ze-Xin 1; Jump, Alistair S.4,5; Zhou, Zhe-Kun1,6,7
	2017-05-01
发表期刊	PLANT ECOLOGY
卷号	218 期号:5 页码:621-633
摘要	Changes in the position of altitudinal treelines and timberlines are considered useful indicators of climatic changes on tree growth and forest dynamics. We sought to determine if recent warming is driving contrasting growth responses of Himalayan birch, at moist treeline (Lete Lekh) and semi-arid timberline (Chimang Lekh) sites in the Trans-Himalayan zone of central Nepal. We used dendrochronological techniques to measure tree ring width (TRW) and basal area increment (BAI) of birch trees from climatically contrasting but nearby sites. The TRW series were correlated with climate records from nearby meteorological stations, and BAI was compared between populations to explore growth trends over recent decades. We found contrasting precipitation trends between nearby sites such that the wet site (Lete) is getting warmer and wetter, and the dry site (Chimang) is getting warmer and drier in recent decades. The radial growth of birch in both moist and semi-arid sites are positively correlated to spring (March-May) rainfall, and negatively correlated to mean and maximum temperature for the same period. The growth climate analysis indicated that moisture availability in early growing season is crucial for birch growth at these locations. The BAI of birch is declining more rapidly at the dry timberline than at the moist treelines in the recent decades, indicating that climatic warming might negatively impact birch radial growth where warming interacts with increasing spring drought in the region. Our work highlights contrasting growth response of birch to climate change at moist and semi-arid forests indicating that local climatic variation must be accounted for when assessing and forecasting regional patterns of tree growth in topographically complex regions like Trans-Himalaya, in order to make accurate predictions of vegetation responses to climate change.
关键词	Betula Utilis Treeline Timberline Ring Width Basal Area Increment Growth Trends
DOI	10.1007/s11258-017-0716-z
收录类别	SCI
语种	英语
WOS记录号	WOS:000399721500011
引用统计	被引频次：32[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/51183
专题	中国科学院东亚植物多样性与生物地理学重点实验室
作者单位	1.Chinese Acad Sci, Key Lab Trop Forest Ecol, Xishuangbanna Trop Bot Garden, Yunnan 666303, Mengla County, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Tribhuvan Univ, Trichandra Campus, Kathmandu, Nepal 4.Univ Stirling, Fac Nat Sci, Biol & Environm Sci, Stirling FK9 4LA, Scotland 5.CREAF, Campus Bellaterra UAB,Edifici C, Cerdanyola Del Valles 08193, Spain 6.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biogeog & Biodivers, Kunming 650204, Peoples R China 7.88 Xuefu Rd, Kunming 650223, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Tiwari, Achyut,Fan, Ze-Xin,Jump, Alistair S.,et al. Warming induced growth decline of Himalayan birch at its lower range edge in a semi-arid region of Trans-Himalaya, central Nepal[J]. PLANT ECOLOGY,2017,218(5):621-633.
APA	Tiwari, Achyut,Fan, Ze-Xin,Jump, Alistair S.,&Zhou, Zhe-Kun.(2017).Warming induced growth decline of Himalayan birch at its lower range edge in a semi-arid region of Trans-Himalaya, central Nepal.PLANT ECOLOGY,218(5),621-633.
MLA	Tiwari, Achyut,et al."Warming induced growth decline of Himalayan birch at its lower range edge in a semi-arid region of Trans-Himalaya, central Nepal".PLANT ECOLOGY 218.5(2017):621-633.

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