以黑龙江丰林国家级自然保护区为研究区域，依据地形地势自上而下将山体划分为上坡位、中坡位、下坡位和谷底，各选取15个样地进行野外调查，运用统计学方法研究坡位对红松（ Pinus koraiensis）阔叶林群落结构和物种多样性的影响。结果表明：中坡位和下坡位乔木层盖度显著高于上坡位和谷底，灌木盖度随坡位下降递减，而草本盖度则递增；中坡位和下坡位乔木物种丰富度和多样性显著高于上坡位和谷底，草本物种丰富度和多样性随坡位下降递增，而灌木物种丰富度和多样性随坡位变化无显著差异；谷底乔木物种均匀度显著低于上坡位、中坡位和下坡位，灌木和草本物种均匀度随坡位变化无显著差异。%We surveyed 60 plots in total averagely selected from four slope position from top to bottom in Fenglin Reserve, north-east China, and applied statistical methods to analyze the influence of slope position on community structure and species diversity.The tree coverage in mid slope position and bottom slope position was significantly higher than that in top slope position and valley, shrub coverage reduced successively along with downgrade, and contrary the herbs coverage.The tree species abundance and diversity index of mid slope position and bottom slope position were significantly higher than those in top slope position and valley, and the herbs species abundance and diversity index raised successively along with down-grade with no significant different in shrub.The tree species evenness of valley was significantly lower than that in other slope positions, and there was no significant different in shrub and herbs.
展开▼
