茂兰喀斯特山地南方铁杉种群结构和动态初探

A PRILIMINARY STUDY ON THE STRUCTURES AND DYNAMICS OF TSUGA TECHEKIANGENSIS POPULATIONS IN KARST MOUNTAIN OF MAOLAN

基于大小结构分析法、矩阵模型和分布格局距离方法，研究了茂兰喀斯特山地南方铁杉种群的结构和动态特征：①该种群为中衰型种群；②其空间分布格局表现为聚块内个体呈剧烈聚集分布，而聚块个体呈均匀分布；③南方铁杉种群密度（ＤＳ）有随种群个体径级（ＤＧ）增大而增加的趋势：ＤＳ＝０．００３５ＤＧ１．７３２９；④南方铁杉为先锋种群，能于山顶特殊生境中与其它物种一起于一定时期内形成稳定群落，但其终将为阔叶树种取代；⑤在某种程度上，种群的空间分布格局距离法和矩阵模型能够较好地应用于中亚热带森林种群研究．

Based on the Matrix model and Spatial Pattern Distance method, the structural and dynamical characteristics of the Tsuga techekiangensis population in karst mountain of Maolan were studied. The following couclusions were drawn: ①the population is middle senescent. ②The spatial pattern of the population is that the spots distibute uniformly while the inner individuals of these spots distribute contagiously.③The population density tends to increase along with the increasing of the diameter of the population's individuals : DS= 0. 0035 DG1.7329. ④The population is a pineer of the karst forest succession in chinese subtropics. At rocky steep or ridges, it may develope into stationary community with other populatios. But it will be replaced by broadleaved species eventually. ⑤To some extent , the Spatial pattern Distance method and Matrix model of population can be adquately used in the middle-subtropical forest studies.