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题名: Elevational patterns of species richness and endemism for some important taxa in the Hengduan Mountains, southwestern China
作者: Zhang, Da-Cai1, 2; Zhang, Yong-Hong1, 2; Boufford, David E.3; Sun Hang(孙航)1
刊名: BIODIVERSITY AND CONSERVATION
关键词: Area ; Basal taxa ; Climatic variables ; Dispersal of species ; Endemic species ; Unimodal pattern
英文摘要: We describe the elevational patterns of species richness and endemism of some important taxa in the Hengduan Mountains, southwest China. Species richness data came from publications, an online database, herbaria and field work. Species richness was estimated by rarefaction and interpolation. The Hengduan Mountains region was divided into a southern and northern subregion, and all species were assigned to four groups based on their distributional range within this region. The conditional autoregressive model (CAR) was used to relate species richness and explanatory variables. The elevational patterns of total, endemic and non-endemic species richness, at subregion and entire region scales, presented to be unimodal and peaked at similar elevations. Area size was strongly related with species richness, and was more powerful in explaining variation in species richness in the northern subregion than in the southern subregion. A single climatic variable (mean annual rainfall, potential evapotranspiration or moisture index) showed a weak relationship with the elevational pattern of species richness. Area and climatic variables together explained more than 67% of the variation in non-endemic richness, 53% in total richness, and 50% in endemic richness. There were three patterns of endemism at the generic level with increasing elevation: namely endemism increased, decreased, or peaked at middle elevations. All selected taxa have experienced rapid speciation and evolution within this region, which plays an important role in the uniform elevational patterns of total, endemic and non-endemic richness, and in the multiform elevational patterns of endemism.
出版日期: 2009-03-01
卷号: 18, 期号:3, 页码:699-716
DOI标识: 10.1007/s10531-008-9534-x
语种: 英语
ISSN号: 0960-3115
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/2781
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Yunnan, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China
3.Harvard Univ, Cambridge, MA 02138 USA

Recommended Citation:
Zhang, DC; Zhang, YH; Boufford, DE; Sun, H.Elevational patterns of species richness and endemism for some important taxa in the Hengduan Mountains, southwestern China,BIODIVERSITY AND CONSERVATION,2009,18(3):699-716
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