Divergent and narrower climatic niches characterize polyploid species of European primroses in Primula sect. Aleuritia

Détails

Ressource 1Demande d'une copie Sous embargo indéterminé.
Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_FF4FFF55394C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Divergent and narrower climatic niches characterize polyploid species of European primroses in Primula sect. Aleuritia
Périodique
Journal of Biogeography
Auteur(s)
Theodoridis S., Randin C., Broennimann O., Patsiou T., Conti E.
ISSN
0305-0270
Statut éditorial
Publié
Date de publication
2013
Peer-reviewed
Oui
Volume
40
Numéro
7
Pages
1278-1289
Langue
anglais
Résumé
Aim It is hypothesized that the ecological niches of polyploids should be both distinct and broader than those of diploids - characteristics that might have allowed the successful colonization of open habitats by polyploids during the Pleistocene glacial cycles. Here, we test these hypotheses by quantifying and comparing the ecological niches and niche breadths of a group of European primroses. Location Europe. Methods We gathered georeferenced data of four related species in Primula sect. Aleuritia at different ploidy levels (diploid, tetraploid, hexaploid and octoploid) and used seven bioclimatic variables to quantify niche overlap between species by applying a series of univariate and multivariate analyses combined with modelling techniques. We also employed permutation-based tests to evaluate niche similarity between the four species. Niche breadth for each species was evaluated both in the multivariate environmental space and in geographical space. Results The four species differed significantly from each other in mono-dimensional comparisons of climatological variables and occupied distinct habitats in the multi-dimensional environmental space. The majority of the permutation-based tests either indicated that the four species differed significantly in their habitat preferences and ecological niches or did not support significant niche similarity. Furthermore, our results revealed narrower niche breadths and geographical ranges in species of P. sect. Aleuritia at higher ploidy levels. Main conclusions The detected ecological differentiation between the four species of P. sect. Aleuritia at different ploidy levels is consistent with the hypothesis that polyploids occupy distinct ecological niches that differ from those of their diploid relative. Contrary to expectations, we find that polyploid species of P. sect. Aleuritia occupy narrower environmental and geographical spaces than their diploid relative. These results on the ecological niches of closely related polyploid and diploid species highlight factors that potentially contribute to the evolution and distribution of polyploid species.
Mots-clé
Allopolyploidy, Europe, macroecology of polyploidy, niche breadth, niche overlap, niche similarity, polyploid speciation, Primulaceae, secondary contact
Web of science
Création de la notice
20/12/2012 13:07
Dernière modification de la notice
20/08/2019 17:29
Données d'usage