Guariba-Roosevelt Extractive Reserve
Guariba-Roosevelt Extractive Reserve is a protected area in Mato Grosso, Brazil. Created in 1996, it covers about 164,224 hectares and is mainly in the municipality of Colniza, with smaller parts in Aripuanã and Rondolândia. It is managed as an extractive reserve, meaning traditional communities live there by fishing, hunting, small-scale farming and collecting forest products like nuts and rubber.
A small traditional population relies on these activities, but the reserve faces pressure from illegal logging and land grabbing. The area lies south of Guariba State Park in Amazonas. The Roosevelt River forms the western boundary and the Guariba River forms the eastern boundary of the northern part. The MT-418 highway crosses the southern part.
The reserve is in the Amazon biome with a warm, humid climate. It is home to jaguars, tapirs, black caimans, ocelots, capuchin monkeys, six-banded armadillos, paca, agouti and many birds. In addition to nuts and rubber, residents hunt and fish for subsistence.
The conservation unit has a complex legal history, with several decrees and laws changing its size and status. It was expanded in 2007 and again in 2015 to its current area. A deliberative council was created in 2009 and a management plan approved in 2011. The reserve has faced disputes over occupancy and land ownership, but maintaining its current size is considered important to protect both people and biodiversity.
This page was last edited on 3 February 2026, at 06:24 (CET).