天然阔叶林优势种群空间格局及其关联性分析  

Spatial distribution patterns and associations of the dominant species in natural broadleaved forest

作　　者：吴开华[1] 唐雪海[1] 吴文友[1] 黄庆丰[1] 肖文杰[1] 巩永芳[1] 

机构地区：[1]安徽农业大学林学与园林学院,合肥230036

出　　处：《安徽农业大学学报》2013年第4期618-622,共5页Journal of Anhui Agricultural University

基　　金：国家自然科学基金项目(31070569);"十二五"国家科技支撑计划林业生态科技工程项目(2011BAD38B0702)共同资助

摘　　要：天然栎类阔叶混交林是皖南山区低山丘陵常见植被类型。本文以铜陵县叶山林场天然栎类阔叶林为研究对象,通过大样地调查,采用Ripley’s K(d)点格局分析法对优势种群空间格局及其关联性进行了分析。结果表明,优势种群栎类直径分布呈偏左正态分布,具有同龄林直径分布特点,为发展种群。在种群空间格局上,麻栎在0～39 m的尺度上为聚集分布,在40～42 m尺度上为随机分布,在大于41 m尺度上为均匀分布。青冈栎在0～40 m尺度上聚集分布,在41～47 m尺度上呈现随机分布,大于47 m尺度上均匀分布。在种群的空间关联性上,麻栎和青冈栎在0～34 m尺度上负相关,在大于43 m的尺度上呈现出显著的正相关。麻栎和青冈栎大树(胸径≥20 mm)和小树(胸径<20 mm)之间的关联性都表现为小尺度上(0～25 m)正关联,大尺度(51～65 m)上的负关联,中等尺度上(26～50 m)的不显著关联。在大多尺度上,栎类与其伴生树种都无显著关联。Natural Quercus broadleaved mixed forest is a common type of vegetation in mountainous area of South Anhui.Based on the investigation of the large plot of natural Quercus broadleaved mixed forest in Yeshan Forestry-farm of Tongling County,the spatial distribution patterns and their associations of the dominant tree species with the Ripley＇s K（d） point pattern analysis were analyzed.The results indicated that the diameter distribution of Quercus dominant populations showed a left-skewed distribution,with even-aged forest diameter distribution characteristics,and were of developing populations.The spatial distribution pattern of Quercus acutissima population was aggregated,random and uniform distribution on a scale from 0 to 39 m,40 to 42 m and over 42 m,respectively.The spatial distribution pattern of Cyclobalanopsis glauca was aggregated,random and uniform distribution on a scale from 0 to 40 m,41 to 47 m and more than 47 m,respectively.The spatial relationships of the population between Quercus acutissima and Cyclobalanopsis glauca were negatively correlated from 0 to 34 m,and positively associated on a scale of more than 43 m.The spatial relationship between the larger tree（DBH≥20 cm）and the small tree（DBH20 cm）for Quercus acutissima and Cyclobalanopsis glauca were positively associated on a small scale（0-25 m）,negatively correlated on a large scale（51-65 m）,and were not correlated on a medium scale（26-50 m）.On most scales,there were no correlation between the tree species of Quercus and other associated tree species.

关 键 词：栎类 种群格局 点格局分析 关联性 

分 类 号：S718.542[农业科学—林学]