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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
The Juglans mandshurica community of Juglans mandshurica in Wuling Mountain Nature Reserve in Beijing was investigated by using a typical sample method. Community structure characteristics and species diversity were also analyzed. The results showed that there were 156 vascular plants in the Juglans mandshurica community, belonging to 55 genera and 111 genera in the community. The north temperate types in the flora were dominant, with the genera accounting for 35.14% of the total genera in the community. Tropical and other ingredients significantly less. There are only 13 species of tree species in the tree layer, and the species of living plants in the community have the highest number of bud plants, accounting for 53 species, followed by 1-year-old herbaceous plants. The tree species had the lowest species diversity and the highest herb layer. The species diversity in the community was negatively correlated with the important value of Juglans mandshurica, but not significant. Only in the community were Carex lanceolata and Carex lanceolata, Agrimonia pilosa Respectively, reached a significant correlation. Table 7 参 参