Deltaic Environments, vulnerability andClimate Change: The role of Migration as anAdaptation and its policy implications (DECCMA) The role of Deltaic Environments, vulnerability and Climate Change: The role of Migration as an Adaptation and its policy implications (DECCMA) is to inform policy on the role of adaptation in the ecosystem management, hence to recognise the need to engage with policy makers and those who are adapting (and those who cannot), as well as to appraise, evaluate, communicate, discuss and support implementation of adaptation based on the implications of our findings.