Machine derived contents note: 1. Chaotic dynamics in food web systems 1 -- G. F. Fussmann -- 2. Generalized models 21 -- T. Gross et al. -- 3. Dynamics of plant communities in drylands 49 -- E. Meron and E. Gilad -- 4. Metapopulation dynamics and the evolution of dispersal 77 -- K. Parvinen -- 5. The scaling law of human travel - A message from George 109 -- D. Brockmann and L. Hufnagel -- 6. Multiplicative processes in social systems 129 -- D. H. Zanette and S. C. Manrubia -- 7. Criticality in epidemiology 159 -- N. Stollenwerk and V.A.A. Jansen -- 8. Network models in epidemiology 189 -- A. L. Lloyd and S. Valcika -- 9. Genetic networks 215 -- S. Bottani and A. Mazurie