重庆涪陵磨盘沟桫椤种群结构与分布格局研究  

STUDY ON THE POPULATION STRUCTURE AND DISTRIBUTION PATTEREN OF ALSOPH11A SPINUSOLA TRYON IN MOPANGOU, FULING, CHONGQING

作　　者：尚进[1] 李旭光[2] 石胜友[1] 

机构地区：[1]涪陵师范学院生命科学系,重庆涪陵408003 [2]西南师范大学生命科学学院,重庆400715

出　　处：《西南农业大学学报（自然科学版）》2003年第3期197-199,206,共4页Journal of Southwest Agricultural University

基　　金：国家自然科学基金项目资助(39570130)

摘　　要：以重庆涪陵磨盘沟桫椤群落为研究对象,对调查样地内的桫椤种群结构和分布格局进行了研究。结果表明:现阶段种群结构为增长型类型;桫椤种群呈聚集分布,但聚集程度不是很高,聚集面积不是很大,这在一定程度上反映出小种群的特点。在此基础上分析了格局形成的原因,并提出保护建议。A field survey was conducted of the population structure and distribution pattern of Alsophila spinulosa Tiyon, an oldest tree species in the world, in Mopangou, Fuling, Chingqing. Hie results showed that the population of the species is expanding at the present stage and is characterized by a aggregating distribution. However, the aggregation degree is not high and the aggregation area is not large, which reflects, to some extent, the characteristics of small populations. The causes for such a distribution pattern are analyzed and proposals for the protection of the tree species are offered.

关 键 词：种群结构 分布格局 涪陵/重庆 桫椤自然保护区 

分 类 号：S181[农业科学—农业基础科学] S718.45