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天然阔叶林优势种群空间格局及其关联性分析
吴开华,唐雪海,吴文友,黄庆丰,肖文杰,巩永芳
0
(安徽农业大学林学与园林学院,合肥 230036)
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。
关键词:  栎类  种群格局  点格局分析  关联性
DOI:
投稿时间:2013-03-26
基金项目:国家自然科学基金项目(31070569)和“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。
Spatial distribution patterns and associations of the dominant species in natural broadleaved forest
WU Kai-hua,TANG Xue-hai,WU Wen-you,HUANG Qing-feng,XIAO Wen-jie,GONG Yong-fang
(School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036)
Abstract:
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(DBH<20 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.
Key words:  Quercus  spatial distribution pattern of population  point pattern analysis  association

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