气候变化领域集成服务门户(CCPortal): Opposite Tree-Tree Interactions Jointly Drive the Natural Fir Treeline Population on the Southeastern Tibetan Plateau

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DOI	10.3390/f12101417
	Opposite Tree-Tree Interactions Jointly Drive the Natural Fir Treeline Population on the Southeastern Tibetan Plateau
	Wang, Yafeng; Mao, Qing; Ren, Ping; Sigdel, Shalik Ram
通讯作者	Wang, YF (通讯作者)
发表日期	2021
EISSN	1999-4907
卷号	12 期号:10
英文摘要	The long-term stability of alpine treeline positions and increased stem density are frequently reported by recent studies; however, whether a denser treeline forest is relevant to competitive tree-tree interactions remain unclear. Herein, we mapped and surveyed individual trees in two undisturbed Smith fir (Abies georgei var. smithii) treeline plots (with a size: 30 m x 200 m; plot NE1: 4477 m, NE2: 4451 m) near Ranwu Lake (RW) on the southeastern Tibetan Plateau. The surface pattern method and spatial point pattern analysis were used to detect the spatial distribution patterns of three size classes (seedlings, juveniles, adults) and spatial associations between the pairwise size classes. We also compared our results to the spatial patterns of the five other treeline forests (Deqin, Linzhi, Changdu, Yushu, Aba) reported from the Tibetan Plateau. Young trees dominated the two fir treeline plots. Both positive and negative spatial autocorrelations for all of the trees were detected in two study plots. Intraspecific facilitation and competition coexisted at the fir treelines in three forest regions (RW, Linzhi, Aba) characterized by a mild moist climate, whereas intraspecific facilitation dominated the other three forest regions (Changdu, Deqin, Yushu), which featured seasonal climatic stress or high disturbance pressure. Thus, increased stem density at alpine treeline can be linked to competitive interactions in relatively favorable environmental conditions. Overall, the spatial patterns of the treeline population are mainly shaped by the combination of thermal and moisture conditions and are also modulated by non-climatic variables (e.g., disturbance history and microtopography).
关键词	SPECIES INTERACTIONS POTENTIAL RESPONSES SPATIAL-PATTERNS PINUS-UNCINATA LINE RECRUITMENT FACILITATION TEMPERATURE CONTINGENT MOUNTAINS
英文关键词	treeline; climate change; facilitation; competition; Tibetan Plateau
语种	英语
WOS研究方向	Forestry
WOS类目	Forestry
WOS记录号	WOS:000713907000001
来源期刊	FORESTS
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/260299
推荐引用方式 GB/T 7714	Wang, Yafeng,Mao, Qing,Ren, Ping,et al. Opposite Tree-Tree Interactions Jointly Drive the Natural Fir Treeline Population on the Southeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2021,12(10).
APA	Wang, Yafeng,Mao, Qing,Ren, Ping,&Sigdel, Shalik Ram.(2021).Opposite Tree-Tree Interactions Jointly Drive the Natural Fir Treeline Population on the Southeastern Tibetan Plateau.FORESTS,12(10).
MLA	Wang, Yafeng,et al."Opposite Tree-Tree Interactions Jointly Drive the Natural Fir Treeline Population on the Southeastern Tibetan Plateau".FORESTS 12.10(2021).