广西北海海岸沙生白骨壤种群分布格局研究

采用方差／均值比率法，游程法和点到点距离比率法测定广西北海海岸沙生白骨壤种群的分布格局类型，同时对该种群的平均拥挤度进行刀切法估计，结果表明，白骨壤种群的分布格局主要受自身的生物学特征和微地形影响，呈随机或集群分布，3种方法都适用于白骨壤种群分布格局的研究，刀法法是一种比较有效的估测种群平均挤度的方法。

Distribution Pattern of Avicennia marina Population on the Sand Beach of Beihai, Guangxi

By means of variance/mean ratio method, move-distance method and ratio of the distance from first point to the second point method, the distribution pattern types of Avicennia marina population on the sand beach of Beihai, Guangxi were analyzed, and the jackknife estimations of mean crowing index of the population were also measured. The distributions of the population is random or clumped,and influenced mainly by its biological characteristics and microtopography. The three methods are all suitable for the study of the distributions of Avicennia marina population, and the jackknife method is a more effective tool for estimating the mean crowing index of population.