The first motivation of this study is the question of viability of Small Islands Developing States (SIDS). Since Rio+20, SIDS have been recognized as vulnerable entities because of there islandness, smallness and there external dependence. Because of there vulnerability, there consice spatial and temporal scales and for the fragility of their agricultural systems, they are assimilated to laboratories for the analysis of global change. One of the key of there environmental and economical sustainability and resilience depends on how we can strengthen the health of the agroecosystems.