Qualla: Rio Roosevelt Ecological Station

Rio Roosevelt Ecological Station: Introduction

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk), CC BY-SA 3.0. Thirty people live inside the Rio Roosevelt Ecological Station. They belong to a single extended family, scattered across three small communities in nearly 97,000 hectares of rainforest. That ratio -- thirty humans to a thousand square kilometers of wilderness -- tells you something about this place. Located in the municipality of Colniza in Mato Grosso, the station occupies one of the most pristine stretches of Amazon rainforest remaining in the state, far from the agricultural frontier that has stripped so much of the region bare. It also sits beside two archaeological sites whose stories have barely begun to be told.

Image: Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk) | CC BY-SA 3.0

Rio Roosevelt Ecological Station: A Boundary Drawn by a River

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk), CC BY-SA 3.0. The Roosevelt River forms the station's eastern edge, the same river that Theodore Roosevelt and Colonel Candido Rondon navigated during their punishing 1913-1914 expedition through what was then completely unmapped territory. To the west lies the Tucuma State Park. To the north,...

Image: Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk) | CC BY-SA 3.0

Rio Roosevelt Ecological Station: Written, Rewritten, Written Again

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk), CC BY-SA 3.0. The station's legal history reads like a contested novel. A 1997 decree established it at roughly 80,915 hectares. A 1999 state law redrew the boundaries, shrinking it to 53,000 hectares. In 2007, another law expanded it to 96,168 hectares and simultaneously enlarged the neighbor...

Image: Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk) | CC BY-SA 3.0

Rio Roosevelt Ecological Station: Plateaus, Valleys, and Tall Trees

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk), CC BY-SA 3.0. The terrain inside the station ranges from 90-meter lowlands to the Serra da Fortaleza at 340 meters and the Serra do Pirangueiro at 300 meters. Between these ridges, the landscape unfolds as plateaus with steep edges, rolling hills, and broad river valleys. In the wetter lowland...

Image: Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk) | CC BY-SA 3.0

Rio Roosevelt Ecological Station: Threats at the Margins

Fri, 06 Mar 2026 00:00:00 GMT

Photo credit Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk), CC BY-SA 3.0. Predatory fishing is the station's most persistent internal problem. Illegal fishers are estimated to remove at least three tons of fish annually, depleting populations in rivers that serve as nurseries for species across a much wider watershed. Beyond the boundaries, logging and...

Image: Brazil_location_map.svg: NordNordWest derivative work: Виктор В (talk) | CC BY-SA 3.0