气候变化领域集成服务门户(CCPortal): Divergent tree radial growth at alpine coniferous forest ecotone and corresponding responses to climate change in northwestern China

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DOI	10.1016/j.ecolind.2020.107052
	Divergent tree radial growth at alpine coniferous forest ecotone and corresponding responses to climate change in northwestern China
	Wang, Xiaofeng; Yang, Bao
通讯作者	Yang, B (通讯作者)，Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Donggang West Rd 320, Lanzhou, Peoples R China.
发表日期	2021
ISSN	1470-160X
EISSN	1872-7034
卷号	121
英文摘要	Global climate change is reshaping the geographical distribution of forests, especially in mountain regions. The alpine forest ecotone is expected to be affected first, due to the climatic limitations on tree growth, and is thus considered as an indicator of the forest succession to climate change. However, current studies involving tree radial growth and their responses to climate change at alpine forest ecotone remain scarce, posing challenges for predictions of forest dynamics and management strategies under different climate scenarios. Here, we studied 94 Chinese Pine (Pinus tabulaeformis; Pinaceae) and 86 Qinghai Spruce (Picea crassifolia; Pinaceae) trees along the alpine forest ecotone [2100-2400 m above sea level (a.s.l.)] to assess tree growth differences and corresponding responses to climate change in the Helan Mountains, northwestern China. The results revealed that growth rates of Chinese Pine at lowest altitudes and Qinghai Spruce at highest altitudes are strongly affected by water shortage and intraspecific competition, respectively, leading to the tree growth in these regions are inferior to those of other trees in the ecotone (the tree age at maximum width is about 20 years later than in the ecotone), especially for seedling and sapling stages. The responses of tree radial growth to dryness were broadly similar in each sample site, but wetness was more positive in trees at low altitudes than at high altitudes. Climate warming has inhibited the radial growth of Qinghai Spruce at lower distribution limits since 2005, while for Chinese Pine in the same area was not significantly affected by rising temperature, and even the upper limits of the Chinese Pine might migrate to higher altitudes as the calorific limit becomes higher. If climate warming continues, the above process may erode the Qinghai Spruce habitat, resulting in the transitional zone between Chinese Pine and Qinghai Spruce also moving to higher elevations.
关键词	DROUGHT RECONSTRUCTION GLOBAL TEMPERATURE QILIAN MOUNTAINS HELAN MOUNTAINS RING WIDTH VARIABILITY TREELINES PRECIPITATION XYLOGENESIS PATTERNS
英文关键词	Dendrochronology; Climate change; Forest ecotone; Chinese Pine; Qinghai Spruce; Northwestern China
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS记录号	WOS:000604861600002
来源期刊	ECOLOGICAL INDICATORS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/255056
作者单位	[Wang, Xiaofeng; Yang, Bao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China; [Wang, Xiaofeng] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Yang, Bao] Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Yang, Bao] Acad Plateau Sci & Sustainabil, Qinghai Res Ctr Qilian Mt Natl Pk, Xining 810008, Peoples R China; [Yang, Bao] Qinghai Normal Univ, Xining 810008, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaofeng,Yang, Bao. Divergent tree radial growth at alpine coniferous forest ecotone and corresponding responses to climate change in northwestern China[J]. 中国科学院西北生态环境资源研究院,2021,121.
APA	Wang, Xiaofeng,&Yang, Bao.(2021).Divergent tree radial growth at alpine coniferous forest ecotone and corresponding responses to climate change in northwestern China.ECOLOGICAL INDICATORS,121.
MLA	Wang, Xiaofeng,et al."Divergent tree radial growth at alpine coniferous forest ecotone and corresponding responses to climate change in northwestern China".ECOLOGICAL INDICATORS 121(2021).