2种类型阔叶红松林优势种群空间分布格局及其关联性

Spatial Distribution Patterns and Associations of Dominate Population in Two Types of Broadleaved Korean Pine Mixed Forest

以吉林蛟河2块1 hm2阔叶红松林样地全林每木定位数据为基础,运用基于RipleyK(d)函数和Mark相关函数的O-ring统计分析方法,分析了2块样地中红松种群与主要优势种群林分中层与林分上层空间分布格局及树种的空间关联性,结果表明:水曲柳红松林中的红松种群和水曲柳种群在小尺度上为聚集分布的趋势,林分中层的红松种群尤为明显,椴树红松林中的红松和椴树种群在多个尺度上呈聚集分布。2个类型阔叶红松林中相同林层中红松种群与水曲柳种群、椴树种群总体上呈现不相关的空间关系,但不同林层的种群间存在着一定的相关关系。水曲柳红松林中,林分上层中的红松与林分中层的红松在0 19 m的尺度内存在显著地负相关,在椴树红松林中不明显;林分上层水曲柳与林分中层水曲柳、林分上层椴树与林分中层椴树在小尺度上存在明显地负相关关系;林分上层的红松与林分中层的水曲柳及椴树都在较大尺度上存在显著负相关的空间关系,而林分中层的红松与林分上层的水曲柳、椴树的空间相关关系为不相关。

Based on the location data for each timber from two broadleaved Korean pine （Pinus koraiensis） mixed forest plots which area is 1 hm2 at Jiaohe of Jilin province, the spatial distribution pattern and tree species spatial correlation of F. koraiensis and main dominate population in middle and upper vertical forest layer were chosen as study objects, the O-ring statistics based on RipleyK（d） function and Mark correlation function was used to analyze spatial distribution and spatial correlation. The result showed that spatial distribution pattern of P. koraiensis and Fraxinus mandshurica were clumped at smaller scales in F. mandshurica-P, koraiensis forest, P. koraiensis was es- pecially in middle vertical layer. P. koraiensis and Tilia amurensis spatial distribution pattern were clumped at mul- tiple scales. At same vertical layer, P. koraiensis had no significant spatial association to F. mandshurica and T. amurensis, however, there had some association in different vertical layer of different population. P. koraiensis in upper layer has significant negative correlation with midstory layer at 0 -19 m, this properties was not obviously in T. amurensis-P, koraiensis mixed forest. F. mandshurica and T. amurensis in upper vertical layer showed signifi- cant negative correlation with midstory layer at smaller scales. P. koraiensis in upper layer shower significant nega- tive correlation with F. mandshurica and T. amurensis in middle vertical layer lager scale, but P. koraiensis in middle vertical layer had no correlation with F. mandshurica and T. amurensis in upper layer.