应用生态学报2017，Vol.28Issue(5)：1421-1430,10.DOI:10.13287/j.1001-9332.201705.023
关帝山寒温性云杉次生林样地树种组成、结构和空间分布
Species composition, structure and spatial distribution of secondary cold-temperate Picea forest in Guandi Mountain, China
摘要
Abstract
The secondary Picea forest is one of the dominant vegetation types in Guandi Mountain.It's also the representative type of evergreen cold-temperate coniferous forests in subalpine region of north China.A 4 hm2 fixed monitoring Picea forest plot was established in Pangquangou Nature Reserve,Guandi Mountain (GDS plot) to better understand the basic characteristics such as species composition,community structure and its potential ecological process and mechanisms.We analyzed species composition,structure and spatial distribution of sample forest based on the first background survey data in this paper.The results showed that a total of 30 woody plant species existed in the sample area,which belonged to 11 families,22 genera.The total individual number (including branches) was 26218 (independent individual number was 10266).Floristic composition in the region was defined as north temperate elements.Big differences of individual number,average diameter at breast height (DBH) and basal area among different species caused significant community layering effect,and the dominant species in each layer was obvious.Size-class structure of species showed bimodal skewed normal distribution at the canopy layer,approximate normal distribution at the subtree layer,and ‘ L’ type distribution at the shrub layer.Spatial distribution of the dominant tree species such as Picea wilsonii and Larix principis-rupprechtii showed different pattern features with the changing size class,whether in individual number or in aggregation degree.Compared with the above two species with the same size class,a large number of L.principis-rupprechtii with DBH ≥ 30 cm aggregated in the center of sample plot,but few P.wilsonii individuals with DBH ≥30 cm occurred in the plot and had no clustering distribution.Only a few L.principis-rupprechtii with DBH ≤ 10 cm occurred in the plot with a scattering distribution,and a large number of P.wilsonii with DBH ≤ 10 cm aggregated in the center of the plot.There were also many P.wilsonii individuals with DBH ≤ 10 cm distributed in the northwest area of the plot,but Betula albo-sinensis individuals with DBH ≤ 10 cm mostly distributed in the southeast area of the plot.Shrub species such as Cotoneaster acutifolius,Spiraea pubescens and Lonicera szechuanica also showed heterogeneous spatial distribution.Species distribution pattern was affected by habitat conditions,and related to its own development,regeneration traits and ecological habits.关键词
物种组成/群落结构/空间格局/云杉次生林Key words
species composition/community structure/spatial pattern/secondary Picea forest引用本文复制引用
杨秀清,史婵,王旭刚,马慧晶,闫海冰..关帝山寒温性云杉次生林样地树种组成、结构和空间分布[J].应用生态学报,2017,28(5):1421-1430,10.基金项目
本文由国家自然科学基金项目(31470631,31670630)资助 This work was supported by the National Natural Science Foundation of China (31470631,31670630). （31470631,31670630）
