蒙古栎群落交错带(ecotone)的研究

通过群落学的样地法对蒙古栎(Quercus mongolica)群落和核桃楸(Juglans mandshurica)群落、蒙古栎群落和长白落叶松(Larix olgensis)群落、蒙古栎群落和杂灌丛群落及其交错带进行了研究，分析了在三个地点的几种群落结构和物种组成方面的差异，计算了各群落的物种丰富度指数(d_Gl)、Simpson 物种多样性指数(D)、Shannon-Weiner物种多样性指数(H′)及Pielou均匀度指数(J)。研究发现在通化和大青沟两个地区群落交错带的物种丰富度及Shannnon多样性指数最高；而在桦甸群落交错带的物种丰富度和物种多样性指数要比核桃楸群落低，比蒙古栎群落高，没有表现出特别强烈的边缘效应。本文也分析了群落乔木层、灌木层和草本层盖度之间的关系。

A study on the ecotones between Quercus mongolica community and other communities

The ecotones between Quercus mongolica community and other communities such as Juglans mandshurica, Larix olgensis and shrub in Tonghua, Huadian and Daqinggou were studied by sampling method. The structure and composition of three communities and their ecotones in these sites were analyzed. Species richness index, Simpson diversity index and Shannon_Weiner diversity index of Quercus mongolica community, Juglans mandshurica community, Larix olgensis community and their ecotones were calculated.The diversity index and richness index of the ecotones were the highest in Tongha and Daqinggou. But diversity index and richness index of the ecotones in Huadian weren't the highest due to the absence of strong edge effect. The relationships among the coverage of tree layer,shrub layer and herb layer were also analyzed.