不同竞争力的外来种入侵对栖息地毁坏的响应  

Responses of Exotic Invasions With Different Competitive Abilities to Habitat Destruction

作　　者：刘会玉[1,2] 林振山[1,2] 齐相贞[1,2] 沈竟[1,2] 

机构地区：[1]南京师范大学地理科学学院,江苏南京210046 [2]江苏省环境演变与生态建设重点实验室,江苏南京210046

出　　处：《南京师大学报（自然科学版）》2011年第3期111-117,共7页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：国家自然科学基金(40901094);教育部博士点新教师基金(20093207120009);江苏省高校自然科学基金(08KJB170001);江苏高校优势学科建设工程资助项目

摘　　要：初步建立了一个不同竞争力外来种入侵的动力模型,并模拟了外来种的竞争力对入侵的影响,以及不同竞争力外来种入侵对栖息地毁坏的响应过程.研究结果表明:(1)外来种入侵首先威胁的是与其竞争力相邻的弱本地种;(2)在外来种成功入侵之后,将导致比其弱的本地种从强到弱依次灭绝;(3)不同竞争力的外来种入侵对栖息地毁坏的响应是随其竞争等级的奇偶性而发生分异,栖息地毁坏对外来种入侵的影响受外来种竞争力和栖息地毁坏程度共同影响.Invasive alien species are increasingly being recognized as important drivers of ecological change. We have advanced a dynamical model of exotic invasion based on competition and dispersal trade on. The effects of the competition and dispersal abilities on invasion, and the responses of exotic invasion to habitat destruction have been simulated in this paper. The results show that： （ 1 ） The introductions of alien species will threaten the species with similar competition first, and then the poorer competitors. （2） The order of extinction induced by invasive species will rank from the best to the poorest. （3） The responses to habitat destruction will vary according to the odd-ranked and even-ranked species.

关 键 词：竞争力 扩散力 外来种入侵 栖息地毁坏 

分 类 号：Q141[生物学—生态学]