桂林岩溶石山青冈栎种群的结构特征

Structure of Cyclobalanopsis glauca Population on Karst Hills of Guilin

通过取样调查,对桂林岩溶石山青冈栎种群进行统计,绘制了其种群径级与高度级结构图和存活曲线,分析种群的结构特征。结果表明,青冈栎种群幼苗极多,但死亡率极高,因而表现出种群前期下降,后期趋于稳定的特点;青冈栎种群的存活曲线接近于DeeveyⅡ型,表现出稳定型种群特征;青冈栎种群的自然生长更新良好,可通过自我调节能力保持种群的稳定性。

Statistics were collected through sampling survey of Cyclobalanopsis glauca population on Karst hills of Guilin,Guangxi Zhuang Autonomous Region.Analysis on the population structure of C.glauca,including diameter and height structure and survival curve,showed that the population was plenty of seedlings with high mortality,which means early decrease and later stability.The survival curve of the population was close to DeeveyⅡtype,a characteristic of stable population.The study concluded that C.glauca population had good growth and regeneration,and could maintain its stability through self-regulation.