Regional species richness and genetic diversity of arctic vegetation reflect both past glaciations and current climate

Détails

ID Serval
serval:BIB_4065A0B460D3
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Regional species richness and genetic diversity of arctic vegetation reflect both past glaciations and current climate
Périodique
Global Ecology and Biogeography
Auteur(s)
Stewart L., Alsos I.G., Bay C., Breen A.L., Brochmann C., Boulanger-Lapointe N., Broennimann O., Bültmann H., Klith Bøcher P., Damgaard C., Daniëls F.J.A., Ehrich D., Bronken Eidesen P., Guisan A., Svala Jónsdóttir I., Lenoir J., le Roux P.C., Lévesque E., Luoto M., Nabe-Nielsen J., Schönswetter P., Tribsch A., Unn Tveraabak L., Virtanen R., Walker D.A., Westergaard K.B., Yoccoz N.G., Svenning J.-C., Wisz M., Martin Schmidt N., Pellissier L.
ISSN
1466-8238
ISSN-L
1466-822X
Statut éditorial
Publié
Date de publication
2016
Peer-reviewed
Oui
Volume
25
Numéro
4
Pages
430-442
Langue
anglais
Résumé
AimThe Arctic has experienced marked climatic differences between glacial and interglacial periods and is now subject to a rapidly warming climate. Knowledge of the effects of historical processes on current patterns of diversity may aid predictions of the responses of vegetation to future climate change. We aim to test whether plant species and genetic diversity patterns are correlated with time since deglaciation at regional and local scales. We also investigate whether species richness is correlated with genetic diversity in vascular plants.
LocationCircumarctic.
MethodsWe investigated species richness of the vascular plant flora of 21 floristic provinces and examined local species richness in 6215 vegetation plots distributed across the Arctic. We assessed levels of genetic diversity inferred from amplified fragment length polymorphism variation across populations of 23 common Arctic species. Correlations between diversity measures and landscape age (time since deglaciation) as well as variables characterizing current climate were analysed using spatially explicit simultaneous autoregressive models.
ResultsRegional species richness of vascular plants and genetic diversity were correlated with each other, and both showed a positive relationship with landscape age. Plot species richness showed differing responses for vascular plants, bryophytes and lichens. At this finer scale, the richness of vascular plants was not significantly related to landscape age, which had a small effect size compared to the models of bryophyte and lichen richness.
Main conclusionOur study suggests that imprints of past glaciations in Arctic vegetation diversity patterns at the regional scale are still detectable today. Since Arctic vegetation is still limited by post-glacial migration lag, it will most probably also exhibit lags in response to current and future climate change. Our results also suggest that local species richness at the plot scale is more determined by local habitat factors.
Mots-clé
Arctic plants, species richness, glaciation history, intra-specific genetic diversity, AFLP, taxonomic groups, vascular plants, bryophytes, lichens
Web of science
Création de la notice
27/10/2015 13:38
Dernière modification de la notice
03/03/2018 16:28
Données d'usage