Inferring differential evolutionary processes of plant persistence traits in Northern Hemisphere Mediterranean fire-prone ecosystems
Article first published online: 19 DEC 2005
Journal of Ecology
Volume 94, Issue 1, pages 31–39, January 2006
How to Cite
PAUSAS, J. G., KEELEY, J. E. and VERDÚ, M. (2006), Inferring differential evolutionary processes of plant persistence traits in Northern Hemisphere Mediterranean fire-prone ecosystems. Journal of Ecology, 94: 31–39. doi: 10.1111/j.1365-2745.2005.01092.x
- Issue published online: 19 DEC 2005
- Article first published online: 19 DEC 2005
- Received 18 July 2005 revision accepted 11 October 2005 Handling Editor: Angela Moles
- fire ecology;
- fire and plant evolution;
- Mediterranean basin;
- persistence traits;
- 1Resprouting capacity (R) and propagule-persistence (P) are traits that are often considered to have evolved where there are predictable crown fires. Because several indicators suggest a stronger selective pressure for such traits in California than in the Mediterranean Basin, we hypothesize that plant species should have evolved to become R+ and P+ more frequently in California than in the Mediterranean Basin.
- 2To test this hypothesis we studied the phylogenetic association between R and P states in both California and the Mediterranean Basin using published molecular phylogenies.
- 3The results suggest that R and P evolved differently in the two regions. The occurrence of the states differs significantly between regions for trait P, but not for trait R. The different patterns (towards R+ and P+ in California and towards R+ and P– in the Mediterranean Basin) are reflected in the higher abundance and the wider taxonomic distribution of species with both persistence traits (R+P+ species) in California.
- 4The differential acquisition of fire persistence mechanisms at the propagule level (P+) supports the idea that fire selective pressures has been higher in California than in the Mediterranean Basin.
- 5Our comparative phylogenetic-informed analysis contributes to an understanding of the differential role of the Quaternary climate in determining fire persistence traits in different Mediterranean-type ecosystems and, thus, to the debate on the evolutionary convergence of traits.