【摘要】 采用典型性样方法对北京雾灵山自然保护区的胡桃楸Juglans mandshurica群落进行了调查,并进行了群落结构特征及物种多样性的分析。结果表明:胡桃楸群落内维管束植物达156种,隶属于55科111属;植物区系以北温带类型的种类为主,其属数占群落内植物总属数的35.14%,东亚、泛热带等成分明显较少。乔木层物种数较少,只有13种;群落内植物的生活型以地面芽植物最多,为53种,其次是1年生草本,地上芽植物最少。乔木层物种多样性最低,草本层最高;群落内物种多样性与胡桃楸的重要值呈负相关,但不显著;只有群落内穿山龙Dioscorea nipponica与披针叶薹草Carex lanceolata和龙芽草Agrimonia pilosa分别达到了显著相关。表7参20更多还原

【Abstract】 Based on the investigation of Juglans mandshurica community by the sample plots,its structure and species diversity are analyzed.It turns out that there are 156 vascular species in the Juglans mandshurica community,belonging to 55 families 111 genera,among which Temperate distribution compositions make significant dominant,accounting for 35.14% of total genera;and the East Asia and Extensive tropical distribution compositions are remarkably little.There are 13 species in the tree layer,and 53 species in the community belonging to Hemicryptophytes, which are in majority among all the life forms,and the least species are included in the Chamaephytes.The species diversity is little in tree layer,highest in herbage layer,and the species diversity of the community has negative correlation with the important value of Juglans mandshurica,but it is not remarkable;and Dioscorea nipponica has the remarkable correlation with Carex lanceolata and Agrimonia pilosa respectively in the community.更多还原