栖息地破坏空间模式对集合种群动态的影响  

Effect of the spatial pattern of habitat destruction on the dynamics of metapopulation

作　　者：张彦宇[1] 罗鑫娟[2] 

机构地区：[1]西北农林科技大学理学院,陕西杨凌712100 [2]西北农林科技大学生命科学学院,陕西杨凌712100

出　　处：《兰州大学学报（自然科学版）》2013年第1期82-86,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：西北农林科技大学科研启动基金项目(790101140419,720101140417);西北农林科技大学基本科研业务费项目(QN2011124)

摘　　要：利用元胞自动机模型,研究了栖息地破坏空间模式对集合种群动态的影响.结果表明:在破坏聚集度一定的情况下,栖息地面积的减少不利于强竞争物种的续存;在栖息地面积一定的情况下,栖息地破坏聚集度的增大有利于强竞争物种的续存;栖息地破坏比例对集合种群动态的影响更大,但栖息地破坏聚集度对集合种群物种多样性指数的影响更显著.在实际的生物保护中,可根据被保护的物种及其所在集合种群结构选择更加合理的土地开发、利用模式.Some habitats of different areas and aggregation level indexes were simulated by computer. Based on these habitats, cellular automata was used to study the responses of metapopulation dynamics to the spatial pattern of habitat destruction. The results show that, with a certain aggregation level index, the decrease of the habitat areas is favorable to the persistence of inferior competitors in the metapopulation. In a certain habitat areas, with the increasing aggregation level of a habitat, the inferior competitors will go extinct first. In terms of aggregation level index, the habitat areas have more influence on the dynamics of the metapopulation and less on the diversity index. All these results show that it is important to construct the connectivity between patches.

关 键 词：集合种群动态 元胞自动机 栖息地破坏 空间异质性 

分 类 号：Q141[生物学—生态学]