The objective of this study was to improve our understanding of vulnerability and risk assessment; it's causes basically show the intensity, its distribution and human-environment effect on the ecosystem in the Apodi-Mossoro estuary, Northeast Brazil. Vulnerability and risk assessment provides a means of adding value due to ecosystem hazards and land use change scenarios in terms of in between producer, taxpayers, service provider and users (Socio-economic data). This is the type of information for example that can be of interest to policy makers and society at large, and can help influence...