[1] McGill Univ, Redpath Museum, Montreal, PQ H3A 0C4, Canada
[2] UCL, Dept Genet Evolut & Environm, Ctr Biodivers & Environm Res, Gower St, London WC1E 6BT, England
[3] Zool Soc London, Inst Zool, Regents Pk, London NW1 4RY, England
[4] Williams Coll Mystic Seaport, Maritime Studies Program, 75 Greenmanville, Mystic, CT 06355 USA
[5] Queens Univ Belfast, Inst Global Food Secur, Sch Biol Sci, MBC, 97 Lisburn Rd, Belfast BT9 7BL, Antrim, North Ireland
[6] Lincoln Univ, Bioprotect Res Ctr, POB 85840, Canterbury 7647, New Zealand
[7] Univ Victoria, Biol Dept, 3800 Finnerty Rd, Victoria, BC V8P 5C2, Canada
[8] Leibniz Inst Freshwater Ecol & Inland Fisheries, D-12587 Berlin, Germany
[9] Free Univ Berlin, Inst Biol, Konigin Luise Str 1-3, D-14195 Berlin, Germany
[10] Berlin Brandenburg Inst Adv Biodivers Res, D-14195 Berlin, Germany
[11] US Forest Serv, Northern Res Stn, 180 Canfield St, Morgantown, WV USA
[12] Rutgers State Univ, Dept Ecol Evolut & Nat Resources, 14 Coll Farm, New Brunswick, NJ 08901 USA
[13] Univ Windsor, Great Lakes Inst Environm Res, Windsor, ON N9B 3P4, Canada
[14] Czech Acad Sci, Inst Bot, CZ-25243 Pruhonice, Czech Republic
[15] Charles Univ Prague, Fac Sci, Dept Ecol, Vinicna 7, CZ-12844 Prague 2, Czech Republic
[16] Stellenbosch Univ, Ctr Invas Biol, Dept Bot & Zool, ZA-7602 Matieland, South Africa
[17] Smithsonian Environm Res Ctr, Edgewater, MD 21037 USA
[18] Univ Tennessee, Dept Ecol & Evolutionary Biol, Knoxville, TN 37996 USA
[19] Univ Cambridge, Dept Zool, Pembroke St, Cambridge CB2 3QZ, England
[20] Swedish Univ Agr Sci, Dept Forest Ecol & Management, SE-90183 Umea, Sweden
[21] Nanyang Technol Univ, Asian Sch Environm, 50 Nanyang Ave, Singapore, Singapore