Contrasting effects of long distance seed dispersal on genetic diversity during range expansion
BIALOZYT, Ronald
Biodiversité, Gènes et Ecosystèmes [BioGeCo]
Philipps Universität Marburg = Philipps University of Marburg
Biodiversité, Gènes et Ecosystèmes [BioGeCo]
Philipps Universität Marburg = Philipps University of Marburg
BIALOZYT, Ronald
Biodiversité, Gènes et Ecosystèmes [BioGeCo]
Philipps Universität Marburg = Philipps University of Marburg
< Réduire
Biodiversité, Gènes et Ecosystèmes [BioGeCo]
Philipps Universität Marburg = Philipps University of Marburg
Langue
en
Article de revue
Ce document a été publié dans
Journal of Evolutionary Biology. 2005, vol. 19, n° 1, p. 12-20
Wiley
Résumé en anglais
Currently many attempts are made to reconstruct the colonization history of plant species after the last ice age. A surprising finding is that during the colonization phase genetic diversity did not decrease as much as ...Lire la suite >
Currently many attempts are made to reconstruct the colonization history of plant species after the last ice age. A surprising finding is that during the colonization phase genetic diversity did not decrease as much as expected. In this paper we examine whether long distance seed dispersal events could play a role in the unexpected maintenance of genetic diversity during range expansion. This study is based on simulations carried out with a maternally inherited haploid locus using a cellular automaton. The simulations reveal a close relationship between the frequency of long distance seed dispersal events and the amount of genetic diversity preserved during colonization. In particular, when the colonized region is narrow, a complete loss of genetic diversity results from the occurrence of very rare long distance dispersal (LDD) events. We call this phenomenon the 'embolism effect'. However, slightly higher rates of LDD events reverse this effect, up to the point that diversity is better preserved than in a pure diffusion model. This phenomenon is linked to the reorganization of the genetic structure during colonization and is called the 'reshuffling effect'< Réduire
Mots clés
BIOLOGICAL INVASION
CELLULAR AUTOMATON
RANGE EXPANSION
SPATIAL GENETICS
GENETIQUE DES POPULATIONS
Mots clés en anglais
COLONIZATION
EMBOLISM EFFECT
GENE FLOW
GENETIC DIVERSITY
PATTERN FORMATION
RESHUFFLING EFFECT
Origine
Importé de halUnités de recherche