[1] Macaulay Land Use Res Inst, Aberdeen AB15 8QH, Scotland
[2] Univ Montana, Div Biol Sci, Missoula, MT 59812 USA
[3] Univ Concepcion, Dept Bot, Fac Ciencias Nat & Oceanograf, ECOBIOSIS Res Grp Ecol & Biogeog, Concepcion, Chile
[4] IEB, Concepcion, Chile
[5] Univ Tokyo, Kashiwa, Chiba 2778563, Japan
[6] York Univ, Dept Biol, Toronto, ON M3J 1P3, Canada
[7] Univ Bordeaux, INRA, UMR BIOGECO Biodivers Genes & Communautes 1202, F-33405 Talence, France
[8] Univ Arizona, Dept Biol Sci, Flagstaff, AZ 86011 USA
[9] CSIC, Estac Expt Zonas Aridas, Almeria 04001, Spain
[10] Univ Nacl Autonoma Mexico, Inst Ecol, Dept Ecol Biodiversidad, Mexico City 70275, DF, Mexico