气候变化领域集成服务门户(CCPortal): Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet

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DOI	10.1007/s11284-016-1350-2
	Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet
	Dorji, Tsechoe; Moe, Stein R.; Klein, Julia A.; Wang, Shiping; Totland, Orjan
通讯作者	Dorji, T (通讯作者)
发表日期	2016
ISSN	0912-3814
EISSN	1440-1703
起始页码	417
结束页码	426
卷号	31 期号:3
英文摘要	Understanding how biotic interactions and abiotic conditions affect plant performance is important for predicting changes in ecosystem function and services in variable environments. We tested how performances of Astragalus rigidulus and Potentilla fruticosa change along gradients of biotic interactions (represented by plant species richness, abundance of the dominant plant species Kobresia pygmaea, and herbivory intensity) and abiotic conditions (represented by elevation, aspect, and slope steepness) across a semi-arid landscape in central Tibet. Redundancy analyses showed that the biotic variables explained 30 and 39 % of the variation in overall performance of A. rigidulus (P = 0.03) and P. fruticosa (P = 0.01), respectively. Abiotic variables did not contribute significantly to variation among A. rigidulus populations. Plant size decreased with species richness in both species and was larger on south- rather than north-facing slopes. Reproductive effort for both species was significantly negatively related to the abundance of K. pygmaea and both species had larger reproductive effort on south- rather than north- and west-facing slopes. The proportion of biomass allocated to sexual reproduction in P. fruticosa was negatively correlated with K. pygmaea abundance and herbivory intensity. The population density of P. fruticosa was positively related to elevation, species richness, and K. pygmaea abundance. We conclude that plant performance at a local scale was more strongly related to biotic than abiotic conditions, but different components of plant performance responded differently to predictor variables and the responses were species-specific. These findings have important implications for rangeland management under changing environmental conditions.
关键词	BIOTIC INTERACTIONS COMPETITIVE-EXCLUSION POTENTILLA-FRUTICOSA DISTRIBUTION MODELS COMMUNITIES GRASSLAND PLATEAU SCALE DIFFERENTIATION VEGETATION
英文关键词	Alpine meadow; Central Tibet; Plant performance; Biotic interaction; Abiotic conditions
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000374673300013
来源期刊	ECOLOGICAL RESEARCH
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/258759
推荐引用方式 GB/T 7714	Dorji, Tsechoe,Moe, Stein R.,Klein, Julia A.,et al. Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet[J]. 中国科学院青藏高原研究所,2016,31(3).
APA	Dorji, Tsechoe,Moe, Stein R.,Klein, Julia A.,Wang, Shiping,&Totland, Orjan.(2016).Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet.ECOLOGICAL RESEARCH,31(3).
MLA	Dorji, Tsechoe,et al."Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet".ECOLOGICAL RESEARCH 31.3(2016).