A scoping workshop on vulnerability assessment of mangrove biodiversity to climate change in Southeast Asia was conducted in Denpasar, Bali, Indonesia from 23-26 September 2012. The workshop was intended to gather information among collaborators from Indonesia, Philippines and Malaysia to further improve the research framework and methodologies of the full proposal to be submitted to APN in 2013 Annual Calls for Proposals under the ARCP Programme. The main activity of the proposed research is the assessment of mangrove ecosystem sensitivity and adaptability to climate change in Southeast Asia. This will be conducted by studying past and current biodiversity status in selected sites in Indonesia and Philippines, and gathering data on climate change factors such as sea-level rise, temperature, precipitation and CO2 concentration and their scenarios for 40 years based on available regional climate models. Furthermore, impacts of climate change on the sustainability of fish production in selected mangroves ecosystems will be investigated through historical data collection. Finally, socio-economic dependency on the sustainability of fish production in mangrove ecosystems will also be analysed.