绞股蓝枝种群数量动态的初步研究

Preliminary studies on quantitative dynamics of current year shoot populations in the climing herbaceous plant— Genostema pentaphyllum

在构件理论的基础上，通过动态生命表和有关分析，初步探讨不同生境条件下攀援植物绞股蓝当年生枝种群的数量动态．结果表明：不同生境下，相同致死因素对种群个体死亡的贡献率各不相同；在不同的发育阶段，影响枝种群数量动态的主导因素不尽相同；优越生境中，种群的存活率较高，死亡率较低，亏损个体较少，反之亦然；恶劣生境中，枝种群通过提高出生率而增强种群的适合度，维持种群的延续．

ased on the modular theory,the quantitative dynamics of current year shoot populations in G.pentaphyllum under different habitats is exmined through life table and related analyses.The results show as follows:Under different habitats,the same factor has different contribution to the death of individuals in populations;the main factors affecting quantitative change of current year shoot populations are not completely different in different developmental stages;The shoot population in favorable habitat has higher suvivorship rate,lower death rate,the number of killing individuals is also smaller and vice versa;The shoot population in unfavorabe habitat can improve its fitness,maitain its succession through improved birth rate.