Authors: G C Daily; T Söderqvist; S Aniyar; K Arrow; P Dasgupta; P R Ehrlich; C Folke; A Jansson; B Jansson; N Kautsky; S Levin; J Lubchenco; K G Mäler; D Simpson; D Starrett; D Tilman; B Walker Journal: Science Date: 2000-07-21 Impact factor: 47.728