摘要
五角枫(Acermono)落叶阔叶林是江淮丘陵大蜀山重要森林群落之一。为了更好地了解五角枫种群的数量动态,根据样地调查和数据统计,对五角枫种群的年龄结构、静态生命表及其与环境因子之间的关系进行了分析。结果表明:五角枫种群个体数量主要集中在Ⅳ(胸径为15～20cm)和Ⅴ龄级(胸径为20～25cm)(个体数量比例占42.86%),中老龄个体数量多,幼龄个体数量较少,种群处于成熟阶段。种群死亡趋势是生长后期高于生长前期,在Ⅶ～Ⅷ龄级的年龄阶段出现死亡率高峰,存活曲线趋于Deevey-Ⅰ型。引入生命表栏目中的几个函数很好地说明了种群的结构。更新方式为实生苗繁殖,幼龄期发展不稳定,量化分析现阶段整体为稳定型种群,结构增长性很低。
Acer mono deciduous broad-leaved forest is one of the main secondary forests in Moutain Dashu in the hill terrain between the Yangtze and Huaihe River. In order to understand the population quantity and structure dynamics of A. mono population,the quadrat investigation was conducted on its age structure,life table and fecundity according to the population structure of diameter class. The results showed that most individuals concentrated in the age Ⅳ and Ⅴclass（42.86%） （the age of 15～25）,indicating that the population was in the growing and maturing stage. The peak of mortality was from Ⅶ to Ⅷ diameter class,the survival curve of the population trends to the type of Deevey-Ⅰ,and the death rate of the population was higher in the later stage than in the former stage. The population was stable in the whole community at the present stage. The functions used in the static life table could well explain the structure and dynamics of A. mono population.The regeneration of the population was of seed germination and unstable at young stage.
出处
《江西农业大学学报》
CAS
CSCD
北大核心
2010年第6期1158-1162,共5页
Acta Agriculturae Universitatis Jiangxiensis
基金
国家林业局948项目(2006-4-13)
关键词
五角枫
种群数量
结构动态
大蜀山
Acer mono
population quantity
structure dynamics
Mountain Dashu
