海南猕猴岭自然保护区海南锥+黄牛木群落特征研究

采用样地调查法，对海南猕猴岭自然保护区海南锥+黄牛木（Castanopsis hainanensis Merr.+Cratoxylum cochinchinense（Lour.）Blume）群落的植物区系组成、结构特征和物种多样性进行研究。结果显示：（1）在2500 m²样地中，有维管束植物39科73属85种；种子植物区系以热带性质为主。（2）生活型以高位芽为主，占94.12%；叶级以中型叶为主，占71.76%。（3）优势种群处于增长阶段；群落物种频度等级分布为A > C > B > E > D。（4）群落物种丰富度指数为9.85，均匀度指数为0.74，Simpson指数为0.95，Shannon-Wiener指数为3.29；优势种群的优势地位明显，但幼苗更新不足，群落均匀度和多样性指数较低，应加强就地保护力度。

Characteristics of the Castanopsis hainanensis + Cratoxylum cochinchinense community in Mt. Mihouling Nature Reserve,Hainan, China

The floristic composition, characteristics, and species diversity of the Castanopsis hainanensis Merr. and Cratoxylum cochinchinense (Lour.) Blume community in Mt. Mihouling of Hainan were studied. Results showed that: (1) Over an area of 2500 m², a total of 85 vascular plant species were recorded, belonging to 73 genera and 39 families. The spermatophyte flora was mainly tropical. (2) Life form was dominated by phanerophytes, accounting for 94.12%. Leaf form was dominated by mesophylls, accounting for 71.76%. (3) The dominant population was in the growth stage. The community species frequency distribution was A > C > B > E > D. (4) Species diversity of the community was relatively poor with a Margalef index of 9.85, evenness index of 0.74, Simpson index of 0.95, and Shannon-Wiener index of 3.29. This study showed that the position of the dominant population was obvious, but seedling regeneration was insufficient and community evenness and diversity indices were low. Thus, the local protection should be strengthened.