具年龄结构的种群在破碎化生境中的空间分布模型  

The Spatial Distributed Models of Age-Constructed Population Dynamics in Fragmental Natural Habitats

作　　者：杜延军[1] 李旭宏[2] 李自珍[3] 

机构地区：[1]南京财经大学 经济学院,江苏南京210046 [2]西北师范大学 经济管理学院,甘肃兰州730070 [3]兰州大学 数学系,甘肃兰州730000

出　　处：《生物数学学报》2007年第1期81-86,共6页Journal of Biomathematics

基　　金：甘肃省软科学基金项目(RS022-A65-168)

摘　　要：随着人类和其他生物赖以生存的环境破碎化程度的加剧,许多以前是连续分布的物种,目前不得不在破碎化生境(斑块)中求生存,所以,种群在破碎化生境(斑块)中分布问题的研究对生物保护和生境重建意义重大．本文运用Leslie矩阵和Markov链建立了一个具年龄结构的种群在破碎化生境中随时间动态变化的分布模型,讨论了种群在该生境中持续存在以及灭绝的条件．Today, a lot of species that were formerly distributed in continuous pattern have to exist in fragmental natural habitats , patch , along with the intensification of the fragmentation of natural habitats. Therefore, the research of population that dwells on the fragmental natural habitats has a profound significance to protect species and recover natural habitats. This paper established the spatial distributed models of age-constructed population dynamics in fragmental natural habitats by Leslie matrix and Markov chain. The conditions of sustainable existence and extinct of population had been studied.

关 键 词：生境破碎化 种群 Leslie矩阵 MARKOV链 空间分布模型 持续存在 灭绝 

分 类 号：Q141[生物学—生态学]