气候变化领域集成服务门户(CCPortal): Allee effect promotes diversity in traveling waves of colonization

CCPortal

DOI	10.1073/pnas.1201695109
	Allee effect promotes diversity in traveling waves of colonization
	Roques L.; Garnier J.; Hamel F.; Klein E.K.
发表日期	2012
ISSN	0027-8424
起始页码	8828
结束页码	8833
卷号	109 期号:23
英文摘要	Most mathematical studies on expanding populations have focused on the rate of range expansion of a population. However, the genetic consequences of population expansion remain an understudied body of theory. Describing an expanding population as a traveling wave solution derived from a classical reaction-diffusion model, we analyze the spatio-temporal evolution of its genetic structure. We show that the presence of an Allee effect (i.e., a lower per capita growth rate at low densities) drastically modifies genetic diversity, both in the colonization front and behind it. With an Allee effect (i.e., pushed colonization waves), all of the genetic diversity of a population is conserved in the colonization front. In the absence of an Allee effect (i.e., pulled waves), only the furthest forward members of the initial population persist in the colonization front, indicating a strong erosion of the diversity in this population. These results counteract commonly held notions that the Allee effect generally has adverse consequences. Our study contributes new knowledge to the surfing phenomenon in continuous models without random genetic drift. It also provides insight into the dynamics of traveling wave solutions and leads to a new interpretation of the mathematical notions of pulled and pushed waves.
语种	英语
scopus关键词	allee effect; article; gene structure; genetic drift; genetic variability; growth rate; mathematical analysis; population abundance; population dynamics; population genetics; priority journal; travel; Computer Simulation; Demography; Genetic Variation; Genetics, Population; Models, Biological; Population Density; Population Dynamics
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159133
作者单位	Roques, L., UR 546 Biostatistique et Processus Spatiaux, Institut National de la Recherche Agronomique, F-84000 Avignon, France; Garnier, J., UR 546 Biostatistique et Processus Spatiaux, Institut National de la Recherche Agronomique, F-84000 Avignon, France, Aix-Marseille Université, Laboratoire d'Analyse, Topologie, Probabilités (Unité Mixte de Recherche 7353), Faculté des Sciences et Techniques, Avenue Escadrille Normandie-Niemen, F-13397 Marseille Cedex 20, France; Hamel, F., Aix-Marseille Université, Laboratoire d'Analyse, Topologie, Probabilités (Unité Mixte de Recherche 7353), Faculté des Sciences et Techniques, Avenue Escadrille Normandie-Niemen, F-13397 Marseille Cedex 20, France, Institut Universitaire de France, France; Klein, E.K., UR 546 Biostatistique et Processus Spatiaux, Institut National de la Recherche Agronomique, F-84000 Avignon, France
推荐引用方式 GB/T 7714	Roques L.,Garnier J.,Hamel F.,et al. Allee effect promotes diversity in traveling waves of colonization[J],2012,109(23).
APA	Roques L.,Garnier J.,Hamel F.,&Klein E.K..(2012).Allee effect promotes diversity in traveling waves of colonization.Proceedings of the National Academy of Sciences of the United States of America,109(23).
MLA	Roques L.,et al."Allee effect promotes diversity in traveling waves of colonization".Proceedings of the National Academy of Sciences of the United States of America 109.23(2012).