Abstract: The coverage and densities of Cyclosorus acuminatus populations in different habitats was investigated by the successive sampling.The distribution pattern of C. acuminatus was determined according to the calculation of the deviation coefficients and t-test.The results showed that the population of C. acuminatus was observed to be gregarious distribution, with patches of 3.0~3.5 m.The developing trend of C. acuminatus population was estimated.

Key words: Cyclosorus acuminatus, population, distribution pattern, successive sampling

摘要： 调查湖北黄冈黄州龙王山渐尖毛蕨在不同生境条件下的种群密度和盖度。采用相邻格子法计算渐尖毛蕨种群分布的偏离系数,并进行t检验,判断种群分布类型;应用双项轨迹方差法分析种群格局规模。结果表明,渐尖毛蕨种群呈集群分布,形成的斑块直径大小约为3.0~3.5 m,且随着干扰的减少,斑块数目呈现少→多→少,其大小呈现大→小→大的变化趋势。

关键词: 渐尖毛蕨, 种群, 分布格局, 相邻格子法