Pacaás Novos

Pacaás Novos National Park, located in the state of Rondônia in western Brazil near the Bolivian border, covers approximately 765,000 hectares of Amazon rainforest, highland plateaus, and transitional ecosystems of the Guaporé River basin. Established in 1979, it is one of the older national parks in the Brazilian Amazon and protects critical habitat for indigenous peoples and threatened wildlife. The park includes the Serra dos Pacaás Novos, a highland sandstone formation rising above the surrounding lowland Amazon. It takes its name from the Pacaás Novos indigenous group, now known as the Wari' people.

The park supports a full complement of Amazonian megafauna. Jaguars are apex predators, and their populations benefit from the park's low human disturbance. Giant anteaters, giant armadillos, and Brazilian tapirs are present in both highland and lowland habitats. Harpy eagles and crested eagles nest in the tall terra firme forest. The rivers and streams of the Pacaás Novos basin support giant river otters and various caiman species. White-lipped and collared peccaries form large herds. The highland areas support species with affinities to the open cerrado and campo rupestre habitats found atop the sandstone plateaus.

The park's vegetation ranges from dense Amazon terra firme rainforest in the lowlands to highland plateau vegetation influenced by the sandstone substrate. The serras support campo rupestre (rocky highland grassland) vegetation with specialized flora adapted to nutrient-poor, waterlogged conditions. Gallery forests line the highland streams. The lowland forests are characterized by emergent trees reaching 40 meters, including Brazil nut, mahogany (Swietenia macrophylla), and cedar. The transition between highland and lowland ecosystems creates exceptional botanical diversity. Epiphytic orchids and bromeliads are abundant.

The Serra dos Pacaás Novos is a highland sandstone plateau, part of the broader geological transition zone between the ancient Precambrian rocks of the Brazilian Shield and the younger sedimentary formations of the Amazon basin. The sandstone formations are Paleozoic in age and have been deeply dissected by erosion, creating a complex landscape of tablelands, escarpments, waterfalls, and gorges. Lateritic soils cap the plateau, while alluvial soils develop in the river valleys. The park lies in a geologically active zone near the Andes foothills, contributing to its topographic diversity.

Pacaás Novos experiences a tropical climate with a distinct dry season. Annual rainfall ranges from 1,800 to 2,500 mm, concentrated in the wet season (October to April). The dry season (May to September) is pronounced, with monthly rainfall sometimes below 20 mm. Temperatures average 24-27°C, with the highland areas somewhat cooler. Humidity is high throughout the year. The dry season creates significant fire risk, and the transition from wet to dry season is an optimal time for wildlife observation. The park's western location near the Andes means it receives moisture from both Amazonian and Andean weather systems.

The Wari' (Pakaás Novos) people have inhabited this region for centuries, maintaining a complex society based on horticulture, hunting, and fishing. European contact occurred relatively late in Rondônia's history, with more sustained contact in the 20th century during the rubber boom. The Wari' experienced catastrophic population decline from epidemic diseases after contact. Today, the Wari' maintain legal territories adjacent to and partially overlapping the national park. The region also saw colonization by settlers during the military government's development programs in the 1970s and 1980s, which drove deforestation in Rondônia.

Pacaás Novos National Park was established by Decree No. 84.019 on October 1, 1979, during the military government period. It was one of a series of Amazonian protected areas created in the late 1970s as Brazil began to recognize the conservation value of its rainforest. Management was transferred from IBAMA to the newly created ICMBio in 2007. The park has faced pressure from surrounding settlement areas and the BR-364 highway corridor. Overlapping territorial claims with Wari' indigenous lands have required negotiation and zoning adjustments over the decades.

The park's interior is largely roadless and requires authorization from ICMBio for access. The Serra dos Pacaás Novos plateau with its waterfalls and highland vegetation is the primary scenic attraction. Wildlife observation—particularly jaguars, tapirs, and giant anteaters—is exceptional for authorized researchers and ecotourists. The rivers and streams of the park offer fishing and canoeing experiences. Birdwatching in the ecotonal zones between highland and lowland habitats is particularly rewarding, with multiple restricted-range species. Access is via unpaved roads from Ji-Paraná or Guajará-Mirim.

Visitor infrastructure is minimal. ICMBio maintains a field station at the park's edge near Guajará-Mirim, which can serve as a base for authorized expeditions. Guajará-Mirim, on the Bolivian border, is the nearest town with hotel accommodation and is accessible by paved highway from Porto Velho, Rondônia's capital. Guided tours must be arranged with ICMBio-approved operators. All visits require prior authorization, and the park is not set up for independent tourism. The dry season (June to September) is the practical window for overland access.

The park faces ongoing threats from illegal logging, particularly of mahogany and cedar, which command high prices internationally. Illegal land invasion along the park's southern and eastern borders is a chronic problem, driven by land scarcity in Rondônia. Gold mining pressure is increasing as international prices rise. ICMBio works with the Federal Police and environmental agencies to combat illegal activities. Climate change poses a risk through intensification of the dry season and increased fire frequency. The park's adjacency to Wari' indigenous territories creates a natural alliance for conservation, as indigenous peoples actively resist encroachment.