山西太岳山南部针阔混交林群落特征及空间分布格局

Community characteristics and spatial distribution of mixed conifer and broad-leaved forest in South Taiyue Mountain,Shanxi Province of China

为探究针阔混交林群落的空间分布特性、种间关系及演替规律,该研究通过点格局分析方法中的Ripley’L函数对山西太岳山南部1 hm^2针阔混交林中主要乔木种群的空间分布格局及空间关联性进行了研究。结果表明:样地内共调查木本植物41科71属76种,以蔷薇科、毛茛科、唇形科、豆科、菊科、百合科为主,科的分布区类型主要以世界广布为主,属的分区类型以北温带为主;辽东栎(Quercus wutaishanica)、槲树(Quercus dentata)、油松(Pinus tabuliformis)和山杨(Populus davidiana)是该群落的主要树种,样地内的林木总径级结构与主要乔木种群的径级结构相似,呈近似正态分布。辽东栎和槲树的空间分布相似,随尺度增大种群的聚集性减弱并逐渐表现出随机分布的格局特征;油松和山杨在一定尺度范围内呈现聚集分布;主要树种均在一定尺度上表现为两两正相关,且槲树与油松、山杨在整个尺度内都表现为显著正相关。山西太岳山南部针阔混交林中各个乔木种群处于相对稳定的状态。

In order to explored the spatial distribution characteristics, interspecific relationship and succession of mixed conifer broad-leaved forest, we studied the spatial distribution pattern and spatial correlation by using the Ripley＇ L func- tion in point pattern analysis. The results showed that the sample in the investigation of woody plants belonged to 41 fami- lies 71 genera and 76 species, and mainly of which were Rosaceae, Ranunculaceae, Labiatae, Leguminosae, Composi-tae and Liliaceae. The distribution types of the families and genera were mainly Cosmopolitan and North Temperate. Quercus wutaishanica, Q. dentate, Pinus tabuliformis and Populus davidiana were the main tree species in this community. The diameters of the all tree and the main tree species in the plot showed a normal distribution. With the increasing of scale, the aggregated distribution patterns weakened and gradually showed the pattern of random distribu- tion. Pinus tabuliformis and Populus davidiana showed aggregated distribution within a given scale. The interspecific rela- tionships between Quercus wutaishanica, Q. dentata, Pinus tabuliformis and Populus davidiana were positive correlated at a given scale, whereas the interspecific relationships between Quercus dentata , Pinus tabuliformis and Populus david# ana were significantly positive correlated at the whole scale. All trees species showed the relatively steady state in South Taiyue Mountain, Shanxi Province of China.