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Subject: 生物科学::普通生物学
Title: Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet
Author: Dorji, T (Dorji, Tsechoe)1, 2, 3; Moe, SR (Moe, Stein R.)4; Klein, JA (Klein, Julia A.)5; Wang, SP (Wang, Shiping)2, 3; Totland, O (Totland, Orjan)4
Corresponding Author: Dorji, T
Source: ECOLOGICAL RESEARCH
Issued Date: 2016
DOI: 10.1007/s11284-016-1350-2
Volume: 31, Issue:3, Pages:417-426
Indexed Type: SCI
Cooperation Status: 国际
DOC Type: Article
English Abstract: 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.
Language: 英语
WOS ID: WOS:000374673300013
Citation statistics:
Content Type: 期刊论文
URI: http://ir.itpcas.ac.cn/handle/131C11/7704
Appears in Collections:图书馆_期刊论文

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description.institution: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Nongke Rd 6, Lhasa, Tibet Autonomou, Peoples R China
2.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, 4A Datun Rd, Beijing, Peoples R China
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, 4A Datun Rd, Beijing, Peoples R China
4.Norwegian Univ Life Sci, Dept Ecol & Nat Resource Management, POB 5003, NO-1432 As, Norway
5.Colorado State Univ, Dept Ecosyst Sci & Sustainabil, 213 Nat Resources Bldg, Ft Collins, CO 80523 USA

Recommended Citation:
Dorji, T ,Moe, SR ,Klein, JA ,et al. Performance of two alpine plant species along environmental gradients in an alpine meadow ecosystem in central Tibet[J]. ECOLOGICAL RESEARCH,2016,31(3):417-426.
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文件名: V.31(3) 417-426 2016.pdf
格式: Adobe PDF
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