摘要
前人都是采用样方方法对格氏栲种群数量的空间格局进行测定，而格局分布有可能受样方大小的影响，且分析过程中没有涉及聚块间密度差的问题，因而无法掌握种群的聚块大小差别及聚块内个体间的离散程度．本研究采用无样方距离法，测定不同生境的格氏栲种群空间格局，分析格氏栲种群格局的强度和纹理．强度以聚块和间隙的密度差来定义，纹理则是体现聚块内个体间的离散程度与诸聚块间的分离程度．测定结果表明，格氏栲种群格局强度从高到低排列次序为：木姜子＞蚊母树＞冬青＞茜草树＞格氏栲＞米槠＞虎皮楠＞木荷；格局纹理从粗到细的顺序是：木荷＝木姜子＞茜草树＞格氏栲＝冬青＞米槠＞蚊母树＞虎皮楠．这一测定结果与作者采用聚集度指标测定相同样地格氏栲种群空间格局的结果基本相符．因此。
Previous researchers have always determined the spatial distribution patterns(SDP) of Castanopsis kawakamii with a sample distance method.However,the distribution patterns may be affected by the quadrat size and,in the course of analysis,the density differences among the cluster plots are not considered;therefore,differences of cluster plot size and the dispersion degree among individuals of cluster plots can not be known.Authers of this paper have determined the spatial distribution patterns of Castanopsis kawakamii population in different habitats by means of non quadrat distance method and analysed the pattern intensity and grain of the SDP.The pattern intensity is defined with the relative density differences and the pattern grain can embody the dispersion degree of the individuals in the plots,and the dispersion degree among the plots.The determined results are as follows.The intensities of the species range in order from strong to week: Litsea mollifolia>P. kawakamii>I. purpurea>R.cochinchinensis>C.kawakamii>C.carlessii>D.oldphamii>S.superba .The grains of the species queue in order from coarse to close: S.superba=Litsea mollifolia>R.cohinchinensis>C.kawakamii=I.purpurea>C.carlessii>P.racemosam>D.oldphamii. These determined results tally basiclly with the results authers of this paper have got in determining the same plots by means of aggregate index accessing method.In view of this,it is held that the SDP of C.kawakamii is closely related to the habitats and biological features.
出处
《中南林学院学报》
CSCD
1999年第1期59-63,共5页
Journal of Central South Forestry University
关键词
格氏栲
种群生态学
种群分布
空间格局
福建
Fujian province, Castanopsis kawakamii, spatial patterns, distance method,pattern intensity and grain
