摘要
通过调查分析及重要值计算,得出贵州苏铁自然保护区的主要森林群落类型及所处的演替阶段.引入生存函数S(t)、积累死亡率函数F(t)、死亡密度函数f(t)、危险率函数λ(t)4个生存分析函数项目,对森林群落进行优势种群生存分析.结果表明,该保护区群落处在演替初期和中期,且幼龄树所占比例较大;优势种存活曲线除化香、榉树、木荷和任豆属于Deevey-Ⅲ型外,其余优势种存活曲线均属于Deevey-Ⅱ型,优势种群死亡率曲线与消失率曲线变化趋势基本一致,优势种群均呈现第6和第7龄级之后死亡率较大的特点.
The vegetation community sussession and dominant population existance of Cycas guizhouensis Nature Reserve in Guizhou province were analyzed with the help of 4 function including S（t）,F（t）,f（t） and λ（t）.The result showed that plant communities in the reserve were at the early and mid-successional stages,with a larger proportion of the young trees;the survival curves of the dominant population,except Platycarya strobilacea,Zwlkova serrata,Schima superba and Zenia insignis belonging to Deevey-III type,belonged to Deevey-II type.The mortality curve of dominant population had the same trend with the disappearance curve,and the dominant population showed a characteristics of a bigger mortality rate after the sixth and seventh age class.
出处
《林业调查规划》
2010年第4期50-56,共7页
Forest Inventory and Planning
关键词
生命表
生存分析
森林群落
优势种群
贵州苏铁自然保护区
life table
survival analysis
forest community
dominant population
Cycas guizhouensis Nature Reserve
