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2016-12-02 - Colloque/Présentation - poster - Anglais - 1 page(s)

Martinet Baptiste , Lecocq Thomas, Brasero Et Martin Nicolas, Michez Denis , Rasmont Pierre , "Following the cold: speciation assessment between interglacial refugia of the arcto-alpine bumblebee taxa complex Bombus monticola" in Entomology in Brussel, Brussel, Belgique, 2016

  • Codes CREF : Systématique des espèces [zoologie] (DI312A)
  • Unités de recherche UMONS : Zoologie (S869)
  • Instituts UMONS : Institut des Biosciences (Biosciences)

Abstract(s) :

(Anglais) Past climatic oscillations have led to significant changes in distributions of species but their response to climate change depends widely on their eco-climatic tolerances. Pleistocene and Quaternary climatic cycles triggered massive population movements resulting in periods of species reduction for temperate species followed by periods of species range expansions [8]. Until now, cold-adapted species dynamics have comparatively received far less attention. Contrary to temperate taxa, cold-adapted species are expected to reach their largest distribution range during a part of the Ice Ages. The post-glacial warming and subsequent interglacial period led to range contraction toward the high latitude and altitude areas. Such a population dynamic scenario can explain current allopatric patterns of species distributed in Arctic and southern mountains, acting as interglacial refugia, leading to speciation. Bumblebees are a relevant biological model because they have undergone diversification processes during Quaternary climatic cycles and they are adapted to cold environments.