THE GEOGRAPHIC STRUCTURE OF SELECTION ON A COEVOLVING INTERACTION BETWEEN SOCIAL PARASITIC WASPS AND THEIR HOSTS HAMPERS SOCIAL EVOLUTION
Article first published online: 2 AUG 2011
© 2011 The Author(s). Evolution© 2011 The Society for the Study of Evolution.
Volume 65, Issue 12, pages 3527–3542, December 2011
How to Cite
Lorenzi, M. C. and Thompson, J. N. (2011), THE GEOGRAPHIC STRUCTURE OF SELECTION ON A COEVOLVING INTERACTION BETWEEN SOCIAL PARASITIC WASPS AND THEIR HOSTS HAMPERS SOCIAL EVOLUTION. Evolution, 65: 3527–3542. doi: 10.1111/j.1558-5646.2011.01403.x
- Issue published online: 1 DEC 2011
- Article first published online: 2 AUG 2011
- Accepted manuscript online: 6 JUL 2011 11:10PM EST
- Received September 5, 2010, Accepted June 7, 2011, Data Archived: Dryad doi:10.5061/dryad.fm0j1
- Brood parasitism;
- geographic selection mosaic;
- social insects;
- social reversal;
- strongly interacting species
Social parasites exploit societies, rather than organisms, and rear their brood in social insect colonies at the expense of their hosts, triggering a coevolutionary process that may affect host social structure. The resulting coevolutionary trajectories may be further altered by selection imposed by predators, which exploit the abundant resources concentrated in these nests. Here, we show that geographic differences in selection imposed by predators affects the structure of selection on coevolving hosts and their social parasites. In a multiyear study, we monitored the fate of the annual breeding attempts of the solitary nesting foundresses of Polistes biglumis wasps in four geographically distinct populations that varied in levels of attack by the congeneric social parasite, P. atrimandibularis. Foundress fitness depended mostly on whether, during the long founding phase, a colony was invaded by social parasites or attacked by predators. Foundresses from each population differed in morphological traits and reproductive tactics that were consistent with selection imposed by their natural enemies and in ways that may affect host sociality. In turn, parasite traits were consistent with selection imposed locally by hosts, implying a geographic mosaic of coevolution in this brood parasitic interaction.