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Article Dans Une Revue Global Ecology and Biogeography Année : 2016

The regional species richness and genetic diversity of Arctic vegetation reflect both past glaciations and current climate

Laerke Stewart
  • Fonction : Auteur
Inger Alsos
  • Fonction : Auteur
Christian Bay
  • Fonction : Auteur
Amy Breen
  • Fonction : Auteur
Christian Brochmann
  • Fonction : Auteur
Noémie Boulanger-Lapointe
  • Fonction : Auteur
Olivier Broennimann
  • Fonction : Auteur
Helga Bültmann
  • Fonction : Auteur
Peder Klith Bøcher
  • Fonction : Auteur
Christian Damgaard
  • Fonction : Auteur
Fred Daniëls
  • Fonction : Auteur
Dorothee Ehrich
  • Fonction : Auteur
Pernille Bronken Eidesen
  • Fonction : Auteur
Antoine Guisan
  • Fonction : Auteur
Ingibjörg Svala Jónsdóttir
  • Fonction : Auteur
Peter Le Roux
  • Fonction : Auteur
Esther Lévesque
  • Fonction : Auteur
Miska Luoto
Jacob Nabe-Nielsen
  • Fonction : Auteur
Peter Schönswetter
  • Fonction : Auteur
Andreas Tribsch
  • Fonction : Auteur
Liv Unn Tveraabak
  • Fonction : Auteur
Risto Virtanen
Donald Walker
  • Fonction : Auteur
Kristine Westergaard
  • Fonction : Auteur
Nigel Yoccoz
Jens-Christian Svenning
Mary Wisz
  • Fonction : Auteur
Niels Martin Schmidt
Loïc Pellissier

Résumé

Aim. The 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. Location. Circumarctic. Methods. We 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. Results. Regional 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 conclusion. Our 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.

Dates et versions

hal-03666191 , version 1 (12-05-2022)

Identifiants

Citer

Laerke Stewart, Inger Alsos, Christian Bay, Amy Breen, Christian Brochmann, et al.. The regional species richness and genetic diversity of Arctic vegetation reflect both past glaciations and current climate. Global Ecology and Biogeography, 2016, 25 (4), pp.430-442. ⟨10.1111/geb.12424⟩. ⟨hal-03666191⟩
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