Fifty Years of Invasion Ecology: The Legacy of Charles Elton, 1st edition. Edited by David M. Richardson © 2011 by Blackwell Publishing Ltd 329 Chapter 25 Modelling Spread in Invasion Ecology: A Synthesis Cang Hui, Rainer M. Krug and David M. Richardson Centre for Invasion Biology, Department of Botany & Zoology, Stellenbosch University, 7602 Matieland, South Africa