生物入侵结构及物种续存的研究  

Biological invasive structures and species persistence

作　　者：王文婷[1] 李文龙[2] 王淑璠[1] 李自珍[3] 刘华[1] 

机构地区：[1]西北民族大学数学与计算机科学学院,兰州730030 [2]兰州大学草地农业科技学院,兰州730000 [3]兰州大学数学与统计学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2015年第4期569-576,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(11226257;31260098);甘肃省自然科学基金项目(1208RJYA037;145RJZA214);中国博士后科学基金面上项目(2013M530542)

摘　　要：考虑共位捕食、种间竞争和简单食物链3种作用关系,通过建立相应的离散事件模型对比研究发现,外来种采用共位捕食入侵时成功概率远大于其他两种方式,外来种丰度也持续增长并续存.在共位捕食下可成功入侵的参数区域比另外两种方式下的广泛.进一步研究共位捕食下外来种和土著种续存问题,从生物入侵的角度阐释了共位捕食在自然界的普遍存在性.Three invasive interactions （i.e. intraguild predation, competition and a simple food chain） were considered in investigating into the key factors determining successful invasion by means of the discrete event model. Simulation results showed that an exotic species using intraguild predation would have much larger probability of successful invasion than the other two methods. The abundance of alien species would continuously increase, and the species thus would persist. The parameter region of successful invasion should be wider under intraguild predation than the other two methods. The common existence of intraguild predation was explored once again from the perspective of biological invasion.

关 键 词：生物入侵 共位捕食 离散事件模型 续存 

分 类 号：Q141[生物学—生态学]