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2008-01-01 - Article/Dans un journal avec peer-review - Anglais - 17 page(s)

Michez Denis , Patiny Sébastien, Rasmont Pierre , Timmermann K., Verrecken N., "Phylogeny and host-plant evolution in Melittidae s.l. (Hymenoptera: Apoidea)" in Apidologie, 39

  • Edition : Springer, Berlin (Germany)
  • Codes CREF : Entomologie (DI3163), Ecologie (DI3123)
  • Unités de recherche UMONS : Zoologie (S869)
Texte intégral :

Abstract(s) :

(Anglais) Bees and the angiosperms they pollinate have developed intimate and often complex interactions over the past 100 million years. As in other insect-plant interactions, host-plant specificity is variable among taxa. While many solitary bee species display an obvious preference for a narrow spectrum of host-plants (oligolecty), others regularly visit a diversified array of pollen hosts (polylecty). Few studies have examined the patterns of host-plant associations in bees using well-resolved phylogenies at the species level combined with accurate and quantitative data on host-plant preferences. In this study, we examined the evolution of bee-plant relationships in several genera of specialist (oligolectic) bees. We used the Melittidae s.l. as a model taxon by mapping the preferred pollen hosts onto species-level phylogenies to investigate the frequency and pattern of host-plant switching. Our results suggest that host-plant associations are maintained over time in many lineages, but that host switches to unrelated plant families are also common. We find some evidence that host-switches occur more frequently to morphologically similar, rather than closely-related, host-plants suggesting that floral morphology plays a key role in host-plant evolution in bees.

Identifiants :
  • DOI : 10.1051/apido:2007048
  • ISSN : 0044-8435