气候变化领域集成服务门户(CCPortal): No evidence of facilitation collapse in the Tibetan plateau

CCPortal

DOI	10.1111/jvs.12233
	No evidence of facilitation collapse in the Tibetan plateau
	Pugnaire, Francisco I.; Zhang, Lin; Li, Ruicheng; Luo, Tianxiang
通讯作者	Pugnaire, FI (通讯作者)
发表日期	2015
ISSN	1100-9233
EISSN	1654-1103
起始页码	233
结束页码	242
卷号	26 期号:2
英文摘要	QuestionsThe relative importance of facilitation under different environmental conditions has raised some recent controversy centred on predictions of the stress gradient hypothesis (SGH) for its apparent lack of predictive power under very stressful conditions. This criticism, however, is not widely shared nor fully supported by empirical data. We addressed whether changes in interaction intensity in plots under severe environmental stress determine an increase in facilitation and whether facilitation would expand the realized niche of some plant species. LocationFour sites differing in elevation and environmental conditions along a N-S transect in the Central Tibetan Plateau, Qinghai Province, China. MethodsWe assessed plant interaction intensity between the cushion plant, Androsace tapete, and species growing inside its canopy. We recorded species and number of individuals in cushions and in gaps, and mass of the two most frequent species in each site. ResultsInteractions ranged from competition to facilitation, depending on environmental severity. Net interaction balance followed predictions of the SGH, from competition on the relatively more mesic sites to facilitation in the relatively more stressful sites. There were no hints of facilitation collapse even though our harsher sites posed extreme conditions for plant survival. The main limiting factor seems to be temperature, as interaction intensity responded most to this factor, rather than to elevation or rainfall. ConclusionsFacilitation expanded the realized niche of some species, countering adverse environmental conditions. We found no collapse of facilitation under the most stressful conditions, even though some sites were at the edge of the distribution range for the cushion species.
关键词	STRESS-GRADIENT HYPOTHESIS PLANT-PLANT INTERACTIONS POSITIVE SPECIES INTERACTIONS ANDROSACE-TAPETE PRIMULACEAE SPATIAL GENETIC-STRUCTURE CENTRAL CHILE HIGH-ANDES ENVIRONMENTAL-STRESS BIOTIC INTERACTIONS COMMUNITY-LEVEL
英文关键词	Competition; Environmental stress; Facilitation; Interaction intensity; Species richness
语种	英语
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS记录号	WOS:000349376200004
来源期刊	JOURNAL OF VEGETATION SCIENCE
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/258481
推荐引用方式 GB/T 7714	Pugnaire, Francisco I.,Zhang, Lin,Li, Ruicheng,et al. No evidence of facilitation collapse in the Tibetan plateau[J]. 中国科学院青藏高原研究所,2015,26(2).
APA	Pugnaire, Francisco I.,Zhang, Lin,Li, Ruicheng,&Luo, Tianxiang.(2015).No evidence of facilitation collapse in the Tibetan plateau.JOURNAL OF VEGETATION SCIENCE,26(2).
MLA	Pugnaire, Francisco I.,et al."No evidence of facilitation collapse in the Tibetan plateau".JOURNAL OF VEGETATION SCIENCE 26.2(2015).