皖南山区南方红豆杉种群不同龄级立木的点格局分析  

Point pattern analysis of different age-class Taxus chinensis var.mairei individuals in mountainous area of southern Anhui Province

作　　者：王磊[1] 孙启武[2] 郝朝运[1] 田胜尼[3] 张姗姗[1] 陈一锟[1] 张小平[1] 

机构地区：[1]安徽师范大学生物环境与生态安全安徽省高校重点实验室/重要生物资源保护与利用研究安徽省重点实验室,安徽芜湖241000 [2]中国林业科学研究院林业研究所,北京100091 [3]安徽农业大学生命科学学院,合肥230032

出　　处：《应用生态学报》2010年第2期272-278,共7页Chinese Journal of Applied Ecology

基　　金：国家财政预算项目珍稀濒危物种调查监管(2130211);国家自然科学基金项目(30840020);安徽省高等学校省级自然科学研究重点项目(KJ2007A092);国家教育部高等学校博士学科点专项科研基金项目(20060370001)资助

摘　　要：采用点格局分析方法O-ring统计,利用Programita软件对皖南山区霞乡村和仙寓山的南方红豆杉种群不同龄级个体的分布格局及其相互关系进行了分析.结果表明:霞乡村南方红豆杉种群各尺度下均表现为随机分布,而仙寓山南方红豆杉种群在2～25m的空间尺度上呈随机分布,<2m尺度上为集群分布;仙寓山种群Ⅰ龄级在<5m尺度上呈集群分布,而高龄级个体在较多尺度上有偏离随机分布的倾向.随着龄级差距的加大,南方红豆杉幼龄个体与其他个体的空间负关联逐渐显现,而相邻龄级在空间分布上相互独立,关联性很小.南方红豆杉种群的这种空间关系有利于其对资源环境的有效利用,随着个体的生长,南方红豆杉种群的空间分布有一个从聚集到随机的过渡.By using O-ring statistics in point pattern analysis and Programita software,this paper studied the spatial distribution patterns and associations of different age-class individuals of Taxus chinensis var.mairei populations at Xianyu and Xiaxiang in the mountainous area of southern Anhui Province.The Xianyu population had a random spatial distribution at the scales from 2 m to 25 m but a clumped distribution at the scales 〈2 m,while the Xiaxiang population distributed randomly at all the scales.As for Xianyu population,its individuals of age-class I had a clumped distribution at the scales 〈5 m,while the individuals of elder age-classes tended to be non-randomly distributed at more scales than 〈5 m,which might be related to the features of population regeneration.With increasingly enlarged age-class differences,the spatial association between younger and elder age-classes individuals turned to be negative,but less spatial association was observed between adjacent age-classes individuals.Such a spatial relationship between different age-classes individuals of T.chinensis was beneficial to the effective use of resources.With the growth of the individuals,T.chinensis population had a transition from clumped to random distribution.

关 键 词：南方红豆杉种群 Programita软件 点格局分析 空间关联 

分 类 号：S791.49[农业科学—林木遗传育种]