景洪市国有林场思茅松—麻栎林分类型耦合效应研究

Study on Coupling Effect of Pinus kesiya var.langbianensis and Quercus acutissima Stand Types in Jinghong State-Owned Forest Farm

以景洪市国有林场思茅松和麻栎的林分平均胸径和树高,以及灌木层和草本层的生物多样性为序参量,运用容量耦合系数模型构建思茅松和麻栎林分类型的耦合系统,计算并分析两种林分类型的耦合程度,结论如下:①思茅松和麻栎小班边缘区的平均胸径和树高均比核心区略高,说明思茅松林和麻栎林之间存在正向边缘效应;②在正向边缘效应的作用下,思茅松林和麻栎林的边缘区域生物多样性更高;③思茅松林和麻栎林小班的耦合度为正值,说明这两种林分类型存在正向耦合效应,但思茅松—麻栎的小班耦合为中等水平耦合阶段,而麻栎—思茅松的小班耦合为较低水平耦合阶段。

Taking the average diameter at breast height,average tree height,shrub layer biodiversity,and herb layer biodiversity of the Pinus kesiya var.langbianensis and Quercus acutissima forests,in the state-owned forest farm of Jinghong City,as order parameters,the capacity coupling coefficient model was used to construct the Pinus kesiya var.langbianensis and Quercus acutissima stand type coupling system,to calculate and analyze the coupling degree of the two stand types.The conclusions were as follows:①The average diameter at breast height and average tree height of Pinus kesiya var.langbianensis and Quercus acutissima in the marginal areas of subcompartments were slightly higher than the core area,indicating that there was a positive edge effect between Pinus kesiya var.langbianensis and Quercus acutissima forests.②Under the positive edge effect,the marginal areas of Pinus kesiya var.langbianensis and Quercus acutissima forests had higher biodiversity.③The coupling degree between Pinus kesiya var.langbianensis and Quercus acutissima forests was positive,indicating that there was a positive coupling effect between these two stand types,but the subcompartment coupling between Pinus kesiya var.langbianensis and Quercus acutissima was at a medium-level coupling stage,and the subcompartment coupling between Quercus acutissima and Pinus kesiya var.langbianensis was at a lower level coupling stage.