气候变化领域集成服务门户(CCPortal): Past the climate optimum: Recruitment is declining at the world's highest juniper shrublines on the Tibetan Plateau

CCPortal

DOI	10.1002/ecy.2557
	Past the climate optimum: Recruitment is declining at the world's highest juniper shrublines on the Tibetan Plateau
	Lu, Xiaoming; Liang, Eryuan; Wang, Yafeng; Babst, Flurin; Leavitt, Steven W.; Julio Camarero, J.
通讯作者	Liang, EY (通讯作者)
发表日期	2019
ISSN	0012-9658
EISSN	1939-9170
卷号	100 期号:2
英文摘要	Alpine biomes are climate change hotspots, and treeline dynamics in particular have received much attention as visible evidence of climate-induced shifts in species distributions. Comparatively little is known, however, about the effects of climate change on alpine shrubline dynamics. Here, we reconstruct decadally resolved shrub recruitment history (age structure) through the combination of field surveys and dendroecology methods at the world's highest juniper (Juniperus pingii var. wilsonii) shrublines on the south-central Tibetan Plateau. A total of 1,899 shrubs were surveyed at 12 plots located in four regions along an east-to-west declining precipitation gradient. We detected synchronous recruitment with 9 out of 12 plots showing a gradual increase from 1600 to 1900, a peak at 1900-1940, and a subsequent decrease from the 1930s onward. Shrub recruitment was significantly and positively correlated with reconstructed summer temperature from 1600 to 1940, whereas it was negatively associated with temperature in recent decades (1930-2000). Recruitment was also positively correlated with precipitation, except in the 1780-1830 period, when a trend toward wetter climate conditions began. Warming-induced drought limitation has likely reduced the recruitment potential of alpine juniper shrubs in recent decades. Ongoing warming without a simultaneous increase in precipitation is expected to further impair recruitment at the world's highest juniper shrublines and alter the dynamics and competitive balance between woody plant species throughout these alpine biomes.
关键词	TREE-LINE SEEDLING ESTABLISHMENT ROCKY-MOUNTAINS PLANT COMMUNITY ALPINE TREELINE DYNAMICS TUNDRA FOREST REGENERATION TEMPERATURE
英文关键词	alpine biomes; climate change; dendroecology; drought; dwarf shrub; global warming; Juniperus pingii var. wilsonii; plot; recruitment; shrubline; temperature optimum; Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000457618800011
来源期刊	ECOLOGY
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/259642
推荐引用方式 GB/T 7714	Lu, Xiaoming,Liang, Eryuan,Wang, Yafeng,et al. Past the climate optimum: Recruitment is declining at the world's highest juniper shrublines on the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2019,100(2).
APA	Lu, Xiaoming,Liang, Eryuan,Wang, Yafeng,Babst, Flurin,Leavitt, Steven W.,&Julio Camarero, J..(2019).Past the climate optimum: Recruitment is declining at the world's highest juniper shrublines on the Tibetan Plateau.ECOLOGY,100(2).
MLA	Lu, Xiaoming,et al."Past the climate optimum: Recruitment is declining at the world's highest juniper shrublines on the Tibetan Plateau".ECOLOGY 100.2(2019).