Abstract
Oceanic islands can "fertilize" adjacent regions, becoming oases of biodiversity amid the oceanic oligotrophic environment. Brazil has 4 oceanic environments, Atol das Rocas and 3 archipelagos, Fernando de Noronha, São Pedro and São Paulo, and Trindade and Martin Vaz. With the release of nutrients, trace elements and the availability of substrate generated by the islands, primary producer…