4th ANdinA international workshop Species range extensions and local adaptation: challenging ecological and evolutionary ideas and assumptionsSan Carlos de Bariloche, Argentina, 29 January-2 February 2018ANdinA holds its unique dialogue-style workshops in wonderful locations around the world every two years. We bring together 30-40 researchers from a diverse range of disciplines to debate challenges, deconstruct contentious issues, develop new ideas and expand future horizons in topics related to ecology, evolution and management.