| 基于Voronoi图的北京公园常见林分空间结构分析 |
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| 引用本文： | 朱俐娜,彭祚登.基于Voronoi图的北京公园常见林分空间结构分析[J].西北林学院学报,2015,30(5):176-180. |
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| 作者姓名： | 朱俐娜 彭祚登 |
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| 作者单位： | （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： | 探究北京平原人工林的林分空间结构，为合理经营森林提供依据。采用混交度、大小比数和聚集指数3个指数，基于Voronoi图空间结构单元分析北京平原常见林分的空间结构特征。林分中存在8种空间结构单元，以1株对象木和5株最近邻木的空间结构为主；除了阔叶纯林外，其余各林分平均混交度处于0.352~0.838，树种间隔离程度有弱度混交、中度混交和强度混交；各林分平均胸径大小比数处于0.441~0.675，表明林分水平异质性不高，林分处于中等竞争状态；林分聚集指数处于0.894~2.037，除了9号和12号样地呈聚集分布，其余各林分均呈均匀分布。林分空间结构基本合理。建议在采取经营措施前，对林分空间结构做出诊断。
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| 关 键 词： | 人工林 Voronoi图 林分空间结构 混交度 大小比数 聚集指数 |
Common Stand Spatial Structure in Beijing Parks Based on Voronoi Diagram Method |
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| ZHU Li-na,PENG Zuo-deng. Common Stand Spatial Structure in Beijing Parks Based on Voronoi Diagram Method[J].Journal of Northwest Forestry University,2015,30(5):176-180. |
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| Authors: | ZHU Li-na PENG Zuo-deng |
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| Institution: | (Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083,China) |
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| Abstract: | To explore plantation stand spatial structures in Beijing plain area and provide evidences for reasonable management of the forest, the spatial structure features (including mingling，neighborhood comparison，and aggregation index) of common forest stands in Beijing parks were analyzed by using Voronoi diagram method. There were 8 kinds of spatial structural units, dominated by 1 target tree with 5 nearest neighbor trees. Except for broad-leaved pure forest, the average mingling degrees of the stands were between 0.325 and 0.838, which indicated the degreed of segregation among tree species were between weak and strong. The average neighborhood comparison rates based on DBH were between 0.441 and 0.675. The differentiation of DBH was not significant, which indicated a middle level of competition. The aggregation indices of the stands were between 0.894 and 2.037, which indicated that the spatial distribution patterns were even distribution while number 9 and 12 plots were aggregated distribution. Spatial structure was basically reasonable. It was suggested that before taking managing measures, diagnosis of the stand spatial structure should be conducted. |
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| Keywords: | plantation Voronoi diagram stand spatial structure mingling neighborhood comparison aggregation index |
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