The Marajó Archipelago Environmental Protection Area covers a fluvial marine complex. It has a hot and humid climate with average temperatures of about. It contains lakes, rivers, creeks, grasslands, forests, farms and beaches. There are seasonal fluctuations with salt water flooding at times and the sweet and muddy waters of the rivers flooding at other times. Vegetation includes alluvial and lowland dense rainforest, savannah, field, and pioneer formations in floodplains, salt marshes, mangroves and sandbanks. The floodplains and low fields are flooded for 3–4 months in the rainy season. Typical Amazon plant species include Caryocar glabrum, Cuban cedar, Couratari multiflora, Hymenaea courbaril, Manilkara huberi, Brazil nut, baboonwood, açaí palm and buriti palm. There is great diversity of terrestrial and aquatic animals including two endangered species of manatee, the West Indian manatee and the Amazonian manatee. The islands have large numbers of buffalo. Buffalo were introduced when a ship carrying them from India to French Guiana was shipwrecked off Marajó island, and they found the environment of flooded fields and abundant vegetation ideal.
History
The Marajó Archipelago Environmental Protection Area was created on 5 October 1989 under article 13 of the Pará state constitution. Objectives are to develop and implement ecological and economic zoning aimed at conserving biodiversity and improving the quality of life of the population. Other goals are to preserve endangered species and representative samples of ecosystems, and support scientific research, environmental education and ecotourism. A presidential decree of 12 February 2007 created an inter-ministerial executive group to monitor the competing actions of federal agencies in the archipelago, and to create a sustainable development plan in collaboration with civil society and the state and municipal governments. This plan was published in September 2007. It covered land use planning, land tenure and environmental management; promotion of sustainable production activities; infrastructure for development; social inclusion and citizenship; and institutional relations and management model. As of 2014 there was still no management plan for the APA, although by law there should be a management plan for the conservation unit, its buffer zone and ecological corridors, including measures to promote their integration into the socio-economic life of the surrounding communities.