长白山云冷杉林不同演替阶段的树种空间分布格局及其关联性
Spatial distribution patterns and associations of tree species during different succession stages in sprucefir forests of Changbai Mountains, northeastern China
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摘要: 云冷杉针阔混交林、云冷杉针叶混交林和近原始云冷杉林是长白山区代表性的森林群落。以这3种典型群落的各1块样地调查数据为基础，采用点格局分析法的Oring统计，对各样地主要树种的空间分布格局及树种间的空间关联性进行分析。结果表明：各种群以随机分布为主，从云冷杉针阔混交林到云冷杉针叶混交林和近原始云冷杉林，所有主要树种的空间分布格局聚集分布减少，而随机分布、均匀分布增多，云杉、冷杉和红松两两间的空间关联性，表现为负相关的现象增多。在小尺度上，椴树呈显著聚集分布，其他尺度上表现为随机分布，其他树种分布的规律性不明显。Abstract: Sprucefir and broadleaved mixed forests, sprucefir mixed forests and near primitive sprucefir forests are representative of the forest communities in Changbai Mountains of northeastern China. Based on investigation data from each plot of the above three typical sprucefir forests, one point pattern analysis method—Oring statistics was used to analyze the spatial patterns of dominant species and the spatial correlations among different species were studied. The results showed that the random distribution appeared widely in the three communities, the aggregated distribution decreased, while the random and regular distributions increased in all major species. The phenomenon of negative correlations increased between Pinus koraiensis and P. koraiensis, P. koraiensis and Abies nephrolepis, A. nephrolepis and P. koraiensis from the sprucefir and broadleaved mixed forests to the sprucefir mixed forests and near primitive sprucefir forests. Tilia amurensis was clumped significantly at small scales and a random distribution showed at other scales, the regularity of distribution was not obvious in other species.
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