作　　者： ; ; ;

机构地区： 内蒙古师范大学生命科学与技术学院生物多样性保护和自然保护区规划与管理中心

出　　处： 《植物研究》 2007年第1期119-124,共6页

摘　　要： 运用Gleason丰富度指数、Simpson指数、Shannon-Wiener指数、Cody指数和重要值,对长白山核桃楸林不同采伐方式下的生物多样性及变化进行了研究。结果表明,采伐干扰下群落中草本层的植物多样性和重要值变化最大,α多样性和β多样性指数均在皆伐地表现最高,择伐地次之,未采伐地最低;在重要值上,择伐和皆伐后,草本层植物的种类组成和重要值排序明显不同于对照地。从形式上来讲是采伐方式不同引起了多样性的变化,但其实质是光照条件改变所致;从时间尺度上考虑,是时间边缘效应的结果。同时,核桃楸更新苗数量的调查表明,皆伐地内高的多样性指数和核桃楸幼苗的充分发育均是受光因子作用的结果,它们二者之间并无必然的因果关系。 This paper focuses on change of the species diversity of Juglans mandshurica in different cutring way, which based on field investigations from different permanent sample plots in the Changbai Mountain forest area by using Simpson index （SI）, Shanon-Wiener index（ SH-WI）, Cody index（βc ）and important value （IV）. The studies showed that change diversity in herb layer is more obvious than tree layer and shrub layer in the forest, all of Simpson index, Shanon-Wiener index and Cody index （βc） were increased from remaining plot to selective cutting plot to clearing cutting plot. From the ordination of important value, there was obvious change after selective cutting or clearing cutting compared with remaining plot. We think that the diversity change seems to been caused by cutting interference, and reason is by light changing actually as well as by edge effect from time scale. Besides, by investigation on regeneration of J. mandshurica, both higher diversity of plants and well growth of seedling of J. mandshurica in clearing cutting plot are related to light factor, and it is no relationship between diversity of plants and well growth of J. mandshurica.

关 键 词： 核桃楸 采伐干扰 生物多样性 长白山

领　　域： [生物学]