Barnosky, Anthony D; Brown, James H; Daily, Gretchen C; Dirzo, Rodolfo; Ehrlich, Anne H; Ehrlich, Paul R; Eronen, Jussi T; Fortelius, Mikael; Hadly, Elizabeth A; Leopold, Estella B; Mooney, Harold A; Myers, John Peterson; Naylor, Rosamond L; Palumbi, Stephen; Stenseth, Nils Chr; Wake, Marvalee H