气候变化领域集成服务门户(CCPortal): Tree-to-tree interactions slow down Himalayan treeline shifts as inferred from tree spatial patterns

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DOI	10.1111/jbi.13840
	Tree-to-tree interactions slow down Himalayan treeline shifts as inferred from tree spatial patterns
	Sigdel, Shalik Ram; Liang, Eryuan; Wang, Yafeng; Dawadi, Binod; Camarero, Jesus Julio
通讯作者	Liang, EY (通讯作者)
发表日期	2020
ISSN	0305-0270
EISSN	1365-2699
起始页码	1816
结束页码	1826
卷号	47 期号:8
英文摘要	Aim The spatial patterns of tree populations reflect multiple ecological processes. However, little is known on whether these patterns mediate responses to climate in marginal tree populations such as those forming alpine tree lines. We examined the influence of tree-to-tree interactions on the responsiveness of tree lines to climate warming. Location Central Himalayas. Taxon Betula utilis; Abies spectabilis. Methods We analysed a network of 17 tree line sites located across the central Himalayas, encompassing a wide longitudinal gradient characterized by increasing precipitation eastwards. We quantified the changes in density and the spatial patterns of three 50-year age classes of the two main tree species found at the tree line (Betula utilis and Abies spectabilis), and related them to reconstructed shifts in tree line elevation. Results Younger trees showed clustering near the tree line, while older trees tended to show random spatial distribution. Clustering decreased as climate conditions ameliorated, that is, in the wetter eastern sites. Lower rate of tree line elevation change was observed at the sites with higher clustering intensity. Main Conclusions Our study indicates that tree aggregation weakens tree line responsiveness to climate warming, and thus warming-induced drought stress tends to lower tree line shift rates by enhancing clustering. It also highlights the complexity and contingency of site-dependent tree line responses to climate. Hence, to advance our understanding of tree line processes, we should consider both direct and indirect influences of relevant biotic (tree-to-tree interactions) and abiotic (climate) drivers of tree line dynamics.
关键词	EASTERN TIBETAN PLATEAU SUB-ALPINE FOREST ABIES-SPECTABILIS POSITIVE INTERACTIONS SEEDLING RECRUITMENT ECOTONAL DYNAMICS ROCKY-MOUNTAINS PINUS-UNCINATA CLIMATE SCALE
英文关键词	Abies spectabilis; Betula utilis; climate change; clustering; dendroecology; point pattern analysis; recruitment; species interactions; tree density; tree rings
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Physical Geography
WOS类目	Ecology ; Geography, Physical
WOS记录号	WOS:000525966400001
来源期刊	JOURNAL OF BIOGEOGRAPHY
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/260004
推荐引用方式 GB/T 7714	Sigdel, Shalik Ram,Liang, Eryuan,Wang, Yafeng,et al. Tree-to-tree interactions slow down Himalayan treeline shifts as inferred from tree spatial patterns[J]. 中国科学院青藏高原研究所,2020,47(8).
APA	Sigdel, Shalik Ram,Liang, Eryuan,Wang, Yafeng,Dawadi, Binod,&Camarero, Jesus Julio.(2020).Tree-to-tree interactions slow down Himalayan treeline shifts as inferred from tree spatial patterns.JOURNAL OF BIOGEOGRAPHY,47(8).
MLA	Sigdel, Shalik Ram,et al."Tree-to-tree interactions slow down Himalayan treeline shifts as inferred from tree spatial patterns".JOURNAL OF BIOGEOGRAPHY 47.8(2020).