Araucárias

Araucárias National Park is a protected area of approximately 12,841 hectares located in the municipalities of Passos Maia and Ponte Serrada in the western highlands of Santa Catarina state, southern Brazil. Established on October 19, 2005, the park was created to protect one of Brazil's most threatened ecosystems — the Araucaria moist forest, also known as mixed ombrophilous forest — characterized by the iconic Araucaria angustifolia (Paraná pine) and a distinctive suite of associated species. Elevations range from 805 to 1,218 meters, producing a cool, temperate-influenced climate unusual for Brazil. The park sits within the Atlantic Forest biome and protects headwaters of the Chapecó, Chapecozinho, Mato, and Caratuva rivers. It represents a critical remnant of a once-vast forest type that historically covered over 200,000 square kilometers of southern Brazil but has been reduced by over 97 percent through agricultural clearance.

The Araucaria moist forest of Araucárias National Park supports a distinctive fauna adapted to the cool subtropical highland environment. South American tapirs, pumas, ocelots, giant anteaters, and southern coatis inhabit the forest interior. Maned wolves may occur at the forest edges. The park is important for birds associated with Araucaria forests, including the vinaceous-breasted parrot and the critically endangered Alagoas antwren. Araucaria seeds (pinhões) are a key food resource for a suite of animals including the azure jay, squirrels, and agoutis, all of which act as seed dispersers for the Araucaria trees. The streams and rivers support freshwater fish species endemic to the Atlantic Forest river drainages. Amphibians, including several tree frog species, inhabit the damp forest floor and stream margins, contributing to the park's high herpetofaunal diversity.

The park's defining ecological feature is the Araucaria angustifolia, a coniferous tree whose distinctive umbrella-shaped canopy dominates the upper forest layer and gives the landscape its unique character. This species, listed as critically endangered by the IUCN, once formed immense forests across the highlands of Paraná, Santa Catarina, and Rio Grande do Sul. In Araucárias National Park, these giants coexist with other threatened species including the tree fern Dicksonia sellowiana and the imbuia Ocotea porosa. The forest understory includes a diverse community of bromeliads, ferns, orchids, and native shrubs. Gallery forests along watercourses add riparian species to the mix. The park also contains areas of campo (highland grassland), adding further habitat diversity. The combination of Araucaria forest and associated biodiversity makes this one of South America's most ecologically unique landscapes.

The western plateau of Santa Catarina, where Araucárias National Park is situated, is underlain by the Serra Geral volcanic formation, a sequence of basaltic lava flows erupted during the Cretaceous period as part of the Paraná-Etendeka Large Igneous Province — one of the largest volcanic events in Earth's history. These dark, fine-grained basalts weather to produce fertile, clay-rich soils that historically supported both rich forest and productive agriculture. The highland plateau is dissected by river valleys cutting downward through the basalt layers, creating steep-sided valleys and waterfalls where rivers begin their descent toward the Paraná River drainage. The relatively flat topography of the plateau contrasts with the incised valleys of the park's lower areas. Outcrops of vesicular basalt are common throughout the park, reflecting the porous nature of the original lava flows.

Araucárias National Park experiences a humid subtropical highland climate (Köppen Cfb), with cool temperatures, ample rainfall distributed throughout the year, and occasional frost and even snow during winter months. Annual rainfall averages 1,700 to 2,200 millimeters, falling without a pronounced dry season. Winter temperatures regularly drop below 5°C, and frost occurs most winters on the plateau, while summer temperatures are moderate, typically ranging from 15°C to 25°C. This cool, moist climate is precisely what sustains the Araucaria moist forest, which requires these conditions and cannot regenerate in warmer, drier areas. The cool summers and cold winters give the park a temperate character very different from the tropical forests of most of Brazil, making it a distinctive biogeographic island of cool-adapted species in an otherwise warm continent.

The highland plateau of western Santa Catarina was inhabited by indigenous Kaingang and Xokleng peoples before European colonization. These groups subsisted in part on the pinhão seeds of the Araucaria tree, which provided a critical starchy food during winter. German, Italian, and Polish immigrants settled the region from the late 19th century onward, bringing European farming traditions that rapidly transformed the Araucaria forests. Timber extraction, particularly of the prized Araucaria angustifolia and imbuia (Ocotea porosa), was economically dominant in the early 20th century, with sawmills operating throughout the plateau and reducing the forest cover dramatically. Subsistence agriculture, cattle ranching, and soybean cultivation further converted what remained of the native forest. The cultural landscape of European immigration coexists with the ecological imperative to protect the park's remaining forest fragments.

Araucárias National Park was established on October 19, 2005, under Federal Decree No. 5.746, by the Lula administration as part of a broader expansion of Brazil's federal protected area network. The park was specifically created to protect remnants of the Araucaria moist forest in Santa Catarina, recognizing the acute threat to this biome from continuing agricultural and silvicultural expansion. ICMBio administers the park with a management plan that addresses the complex challenge of consolidating the park by purchasing private lands within its boundaries — a process still ongoing. The Araucaria forest biome lacks adequate representation in Brazil's protected area network relative to its level of threat, making Araucárias National Park one of the most important recently established conservation units in southern Brazil. The park works in partnership with local municipalities and rural landowners to develop sustainable land use practices in buffer zones.

The park's primary attraction is the experience of walking among mature Araucaria trees, whose distinctive flat-topped silhouettes dominate the skyline and create a forest atmosphere unlike anywhere else in Brazil. Trails wind through dense mixed forest, past tree ferns and orchid-draped understory vegetation, offering excellent birdwatching opportunities for species associated with Araucaria ecosystems. Waterfalls and stream crossings add scenic variety along the routes. The pinhão harvest season in autumn (April to June) is a particularly vivid time to visit, when seeds rain from the trees and the forest is alive with animals gathering this food source. Scenic viewpoints over the western Santa Catarina plateau provide panoramic views across the forest canopy. The park is relatively little-known outside the region, offering a quiet and uncrowded experience in a remarkable ecosystem.

The park's main access points are near the town of Passos Maia, approximately 500 kilometers west of Florianópolis, the state capital. The region is served by BR-282, the main highway connecting the western plateau to the coast. Nearby towns including Ponte Serrada and Xanxerê offer accommodation, restaurants, and fuel. The park has a basic visitor reception area and trail infrastructure. Given the park is still in the process of consolidating its land base through purchase of private inholdings, visitor access may be limited in some areas. Advance contact with the ICMBio park office is advisable to confirm trail conditions and current access. The cool highland climate means warm clothing is needed year-round, and rain gear is essential. The park is most accessible from October through March when road conditions are better and temperatures are milder.

Araucárias National Park was established specifically to address the critical conservation status of the Araucaria moist forest, one of South America's most threatened biomes. Key conservation challenges include the continued pressure of agriculture and exotic pine and eucalyptus plantations in surrounding areas, private land inholdings within the park boundary that complicate management, and the slow pace of land acquisition by the federal government. The Araucaria angustifolia is listed as critically endangered globally, and the park plays a vital role in protecting its remaining populations. ICMBio collaborates with research institutions on ecological monitoring and restoration programs. The park's watershed protection function, maintaining headwaters of important rivers for downstream agriculture and municipalities, provides an economic rationale for conservation that helps build local support. Environmental education programs engage schools in the municipalities of Passos Maia and Ponte Serrada.