[1] The Lagoa São Paulo Reserve had an area of 14,200 hectares (35,000 acres), including seven lagoons, and was home to many species of flora and fauna, some threatened with extinction.

[4] Jânio Quadros came to power in 1955 and took a series of measures to protect the Lagoa São Paulo and Great Pontal reserves, which still had much of their forest cover intact.

His successors were not interested in conservation, and in his second term Adhemar de Barros repealed the decrees published by Jânio Quadros, apart from one that had created the Morro do Diabo State Park.

[6] Flooding affected the municipalities of Presidente Epitácio and Caiuá on the left bank of the Paraná River and the Rio do Peixe, the lagoon complex of the Lagoa São Paulo Ecological Reserve and its surroundings.

[9] The reserve would be part of the proposed Trinational Biodiversity Corridor, which aims to provide forest connections between conservation units in Brazil, Paraguay and Argentina in the Upper Paraná ecoregion.