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杨华,李艳丽,沈林,亢新刚.长白山云冷杉针阔混交林主要树种空间分布及其关联性.生态学报,2014,34(16):4698~4706 本文二维码信息
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长白山云冷杉针阔混交林主要树种空间分布及其关联性
Spatial distributions and associations of main tree species in a spruce-fir forest in the Changbai Mountains area in northeastern China
投稿时间:2013-06-02  修订日期:2014-06-21
DOI: 10.5846/stxb201306021270
关键词空间格局  空间关联  O-ring函数  生长阶段  云冷杉林
Key Wordsspatial distribution  spatial association  O-ring function  growth stage  spruce-fir forest
基金项目林业公益性行业科研项目(201104051)
作者单位E-mail
杨华 北京林业大学, 省部共建森林培育与保护教育部重点实验室, 北京100083 huayang8747@163.com 
李艳丽 北京林业大学, 省部共建森林培育与保护教育部重点实验室, 北京100083  
沈林 北京林业大学, 省部共建森林培育与保护教育部重点实验室, 北京100083  
亢新刚 北京林业大学, 省部共建森林培育与保护教育部重点实验室, 北京100083  
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摘要:
应用点格局分析方法O-ring函数,分析了长白山云冷杉针阔混交林主要树种以及各生长阶段的空间分布格局和空间关联性。结果表明:(1)林分整体、主要建群种冷杉、云杉和红松的径级分布呈倒“J”型分布,属于增长型种群。(2)林分整体、冷杉、色木槭在0-10 m小尺度上均呈聚集分布,其他尺度上以随机分布为主,云杉、红松和椴树在整个研究尺度上以随机分布为主。(3)冷杉和色木槭在较低龄级阶段小尺度上呈明显的聚集分布,较大尺度上呈随机分布或者均匀分布,冷杉聚集程度随着龄级增大而降低。(4)在冷杉、云杉、红松、椴树和色木槭5个树种组成的10个种对中,冷杉与红松、云杉与红松在小尺度0-10 m范围上以正相关为主;色木槭与冷杉、红松、椴树在小尺度0-5 m范围上主要以正相关为主;云杉和冷杉、椴树、色木槭在整个研究尺度上均以不相关为主。椴树和冷杉、色木槭在10-25 m尺度范围上以负相关为主。(5)幼龄层冷杉与乔木层冷杉在小尺度上呈显著负相关,与乔木层其他树种主要表现为不相关。
Abstract:
An observational field plot, covering an area of 60×60m, was established to analyze the spatial distributions and associations of the main tree species in a spruce-fir coniferous and broadleaved mixed forest in the Changbai Mountain area in northeastern China. The spatial coordinates, diameters at breast height (DBH), diameters at ground height (DGH) and heights (H) of all trees with a height exceeding 30 cm and a dbh less than 5 cm were measured. The univariate O-ring function was used to analyze the spatial distribution patterns of the main tree species while the bivariate O-ring function statistic was used to analyze intraspecific and interspecific relationships among different trees. The distribution of tree diameters at breast height (DBH) of the entire community and of individual tree species follows the shape of an inverse J, which is rather unexpected because the distribution of dbh's in these forests is usually bimodal. All the Abies nephrolepis and Acer mono trees show an aggregated spatial distribution at short distances and a random distribution at other scales while Picea koraiensisPinus koraiensis and Tilia amurensis are randomly distributed at all scales. At different growth stages, the main tree species have different spatial distributions. Seedlings and saplings of Abies nephrolepis and Acer mono are spatially aggregated at close ranges but show uniform or random distributions at large scales. Spatial associations between the seedlings, saplings and big trees were also studied. As expected, the intensity of the spatial aggregation is declining with increasing dbh's. With few exceptions, pairs of the five main tree species, show mostly positive association at short distances.
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