Most explanatory frameworks within segregation research interpret patterns of ethnic residential segregation as the result of how members of different ethnic groups have moved (or not moved) within the city and to the city from the surrounding world. Yet, few attempts have been made to proceed beyond relatively static accounts based on descriptions and analysis of patterns of segregation, to address more directly the dynamics behind the patterns. In this article, a longitudinal, individual-based data-set is used in order to analyse the dynamics, in terms of migration and natural population change, that have reproduced and transformed patterns of segregation in Goteborg (Gothenburg), Sweden, between 1995 and 2000. The analysis deals with questions concerning changes in the degree of concentration and dispersal of different minority groups, and the role of the minority enclaves as ports of entry to the local housing market for different groups. The findings have relevance for wider theoretical issues related to the interpretation and explanation of ethnic residential segregation. Copyright (c) 2008 John Wiley & Sons, Ltd.