Else_SP-Jorgensen_prelims.qxd 4/11/2007 18:24 Page i A New Ecology: Systems Perspective Else_SP-Jorgensen_prelims.qxd 4/11/2007 18:24 Page ii Front cover photo is by B.D. Fath and shows Møns Klint, Denmark. The back cover photos show (from left to right) (1) a danish beech forest (Ryget Skov), (2) Krimml Falls in Austria, (3) part of the shore of Namchu Lake in Tibet, (4) Crater Lake, Oregan, USA, and (5) Natron Lake, Tanzania and were taken by S.E. Jørgensen (1 and 4), B.D. Fath (2), and M.V. J