文献类型：期刊文献

英文题名：Habitat hotspots of common and rare tropical species along climatic and edaphic gradients

作者：Xu, Han[1] Detto, Matteo[2] Fang, Suqin[3,4] Li, Yide[1] Zang, Runguo[5] Liu, Shirong[5]

第一作者：许涵

通信作者：Li, YD[1]|[a000515db5a8e58e42817]李意德;

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Smithsonian Trop Res Inst, Balboa, Ancon, Panama;[3]Sun Yat Sen Univ, State Key Lab Biocontrol, Guangzhou 510275, Guangdong, Peoples R China;[4]Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510275, Guangdong, Peoples R China;[5]Chinese Acad Forestry, Res Inst Forest Ecol Environm & Protect, Beijing 100091, Peoples R China

年份：2015

卷号：103

期号：5

起止页码：1325-1333

外文期刊名：JOURNAL OF ECOLOGY

收录：;Scopus(收录号：2-s2.0-84939575928);WOS:【SCI-EXPANDED(收录号:WOS:000360216400023)】；

基金：The authors are grateful to Fangliang He, Richard Condit and Stuart J. Davies for their constructive ideas on an early draft. The authors thank Rebecca Graham, Mingxian Lin, Jianhui Wu, Zhang Zhou and Jinhua Mo for the logistic support, field assistance and other guidance. This work was initiated by Center for Tropical Forest Science - Smithsonian Institution Global Earth Observatory (CTFS-SIGEO) and supported by National Non-profit Institute Research Grant of CAF (CAFYBB2011004, RITFYWZX201204 and CAFYBB2011007), National Natural Science Foundation of China (41201192) and State Forestry Administration of China (201104057).

语种：英文

外文关键词：climatic gradient; common and rare species; determinants of plant community diversity and structure; elevation; habitat differentiation; habitat preference; multiple hotspots; range-restricted species; soil properties; species interaction

摘要：Understanding coexistence in high biodiversity ecosystems requires knowledge of how rare and common species share the multidimensional environmental space. Climatic and edaphic conditions can provide a plethora of habitats, supporting different compositional and structural communities where species can adapt and differentiate. We used a large data set consisting of 580 tropical tree species sampled in 163 25x25m quadrats along an altitudinal gradient covering an area of 160km(2) of tropical rain forest in Jianfengling reserve (Hainan Island, China). For each plot, the data include tree species and abundance, altitude and six soil properties from which a two dimensional environmental space was constructed. With this extensive data set, we tested the hypothesis that different combination of environmental factors can generate multiple hotspots on three axes of diversity: species richness, Shannon-equivalent species richness and habitat preference, a measure of evenness in the distribution of individuals across an environmental gradient. We found that humid and cool areas with more nitrogen availability were occupied by richer and more diverse communities of wide range species. Rare (in terms of number of individuals) and range-restricted species instead, tended to prefer minor habitats, generally warmer with high potassium, calcium, magnesium and, in particular, phosphorous. As a result, wide and range-restricted species were segregated across the environmental space.Synthesis. Our findings indicate rare species tend to occur more frequently where common species are less abundant. A clear pattern of species richness and diversity was driven by a combination of several environmental factors (soil properties and climate). The complexity of the environment not only explains the different species distribution along each habitat, but also determines the relative abundance of each species in the entire community. Although some habitats have low species richness and diversity, they are highly preferred by rare species; therefore, biodiversity conservation efforts should consider protecting these fragile ecosystems.