应用生态学报2017，Vol.28Issue(12)：3815-3826,12.DOI:10.13287/j.1001-9332.201712.002
小五台山森林群落优势种的生态位分析
Niche analysis of dominant species of forest community in Xiaowutai Mountain, China
摘要
Abstract
This paper analyzed the niche breadth and niche overlap of dominant species of forest community in Xiaowutai Mountain,and fitted the response patterns of dominant species to the environment gradients by generalized additive models.The results showed that a total of 392 species of vascular plants,belonging to 222 genera,75 families were recorded in 148 quadrats.A total of 36 dominant species were selected from the tree layer,shrub layer and herb layer by importance values.Betula albosinensis,Betula platyphylla,Larix principis-rupprechtii,Pinus tabuliformis at the tree layer,Spiraea pubescens,Abelia biflora,Rosa bella,Corylus mandshurica at the shrub layer,Carex breviculmis,Deyeuxia arundinacea,Sanguisorba officinalis,Carex siderosticta at the herb layer had higher niche breadth,and these species had greater competitiveness and stronger environmental adaptability.In the same layer,niche overlap index was high indicating that species had similar habitats,and there was competitive relationship between them.Although Acer momo and Quercus wutaishanica had high niche overlap,their competition was not strong in the condition of rich resources.There was niche overlap between B.platyphylla and a variety of mixed tree species including A.momo,Q.wutaishanica,Sorbus alnifolia,and limited resources leaded to strong competition in these communities.The adaptability of each species to environmental factors was different.The response of most dominant species to altitude showed a single peak curve,and they distributed within a certain altitude range.The response of some dominant species to altitude was linearly ncreased or decreased,and concentrated at high altitudes or low altitudes.The response of dominant species to slope position was similar to altitude.The dominant species showed a linear change along the slope,showed significantly positive correlation with soil temperature,and showed the characteristics of shade-requiring or sunny-requiring.The response of B.albosinensis,A.biflora,H.bretschneideri,C.breviculmis,C.dahurica to litter layer thickness and soil thickness showed linearly increased.The response of L.principis-rupprechtii,B.albosinensis,P.fruticosa,D.arundinacea to soil moisture showed linearly increased,while linearly decreased to soil electrical conductivity.Most dominant species to soil pH and environmental disturbance showed a single peak curve,and the others showed linearly decreased.关键词
森林群落/优势种/生态位宽度/生态位重叠/广义可加模型Key words
forest community/dominant species/niche breadth/niche overlap/generalized additive model引用本文复制引用
白晓航,张金屯..小五台山森林群落优势种的生态位分析[J].应用生态学报,2017,28(12):3815-3826,12.基金项目
本文由国家自然科学基金项目(31170494)资助 This work was supported by the National Natural Science Foundation of China (31170494). （31170494）
