The park was created in 1983 to protect the fauna and flora of the rainforests that are characteristic of this region of the Andes. There is a high level of endemism among the fauna and flora found in the park. The yellow-tailed woolly monkey, previously thought extinct, is found only in this area. Research undertaken since 1985 has already uncovered 36 previously unknown archaeological sites at altitudes of between 2,500 and 4,000 m, which give a good picture of pre-Inca society.
Outstanding Universal Value
Brief Synthesis
Rio Abiseo National Park is situated on the Eastern slope of the tropical Andes in North-Central Peru as one of the few World Heritage properties inscribed for both cultural and natural values. Across its 274,520 hectares the property not only harbors several forest types and high Andean grasslands know as Paramo but also extraordinary archaeological values spanning at least eight millennia of human history. Scientists consider the forest part of Pleistocene refuge, meaning that flora and fauna are believed to have survived and evolved here during periods of past glaciation. This is a plausible explanation for the astonishing diversity of flora and fauna and the high degree of endemism found in the forests and grasslands. The numerous archaeological sites blend in harmoniously with the forests, canyons, and highlands – against the stunning backdrop of an unspoiled and remote part of the Andes
The number and variety of archaeological sites found indicate a significant level of human occupation, which dates back to the pre-ceramic era around 6,000 years B.C. and continued steadily until before European colonization. The known ruins and other archaeological remains extend over more than 150,000 hectares in and around the property. Since 1985, 36 archaeological sites have been recorded, 29 in the high elevation grasslands and seven within the continuous montane forests inside the park. Types of features include rock shelters, roads, domestic and ceremonial structures, storage buildings, fences, platforms, agricultural terraces and burial sites. Trade relationships existed with places as far away as the Pacific Coast and what are today the Ecuadorian Andes. Among these archaeological sites, La Playa, Las Papayas, Los Pinchudos, Gran Pajatén, Cerro Central and Manachaqui Cave are worth highlighting.
The property protects the headwaters of three major rivers of the Huallaga Rive system, a major Peruvian tributary to the Amazon. Both the Andean grasslands and the lowland, montane and cloud forests harbour impressive numbers of rare species, many of which are restricted to the property in their range. Among the particularly noteworthy species is the critically endangered Yellow-tailed Woolly Monkey, one of the largest monkey species in South America, which was long believed to be extinct before its scientific rediscovery in what is today the property. In terms of research, the property´s pollen records deserve to be mentioned which contain valuable information on climate dynamics of this part of the Amazon Basin. There is little doubt that future research will reveal new discoveries, both in terms of natural and cultural heritage in an area that benefit from its formal protection status and the natural protection through the remoteness and the rugged terrain.
Criterion (iii): The Pre-Hispanic monuments in the valley of Monte Cristo inside the Abiseo River National Park are outstanding examples of prehispanic adaptation, evolution and human settlement in the high altitude cloud forests of the Peruvian Andes Amazon basin, as early as 6,000 BC, evidenced by the Manachaqui cave, until mid-sixteenth century. The extensive and remarkably complete remains are of great importance for the understanding early human occupation in the Andean region.
Criterion (vii): Situated in a remote part of the tropical Andes, Río Abiseo National Park harbors entire unspoiled river basin covered by dense and lush forests. Towards the higher elevations, the terrain becomes increasingly rugged and deeply dissected. Eventually cloud forests give room to Andean Paramo grasslands. The dramatic scenic beauty of the varied mountain landscape is complemented by numerous small mountain lakes, pools, rivers, creeks and precipitous canyons. Embedded into the landscape are numerous remarkable archaeological sites, serving as a reminder of the still poorly-understood life of bygone societies in a stunning natural environment.
Criterion (ix): The entire tropical Andes, extending across several countries, are known for their global conservation importance, tragically coinciding with increasingly strong human pressure. Within the region, Rio Abiseo National Park stands out as a mostly intact protected area benefitting from a high degree of isolation and natural protection by the harsh terrain. Along the huge altitudinal gradient from around 350 to 4,349 m.a.s.l. and influenced by highly variable soils, expositions, rainfall patterns and microclimates the property is home to extremely varied ecosystems and habitats. Broadly speaking, dry forests can be distinguished from four types of moist forests and the high altitude grasslands. Rio Abiseo´s pristine clouds forests reaching up to 3,600 m.a.s.l. stand out as a rare intact example of a particularly valuable forest type. The property is believed to belong to the Huallaga Pleistocene refugium according to the Pleistocene refuge hypothesis, a prevailing explanation for biodiversity patterns and endemism. Isolated refuges, such as the area today constituting the property, are thought to have enabled not only the survival but also the birth of new species during glacial periods. Still very incomplete records show impressive endemism in plants, invertebrates, amphibians, evidence for ongoing speciation processes. Beyond the scientifically fascinating degree of endemism, Rio Abiseo National Park is also an important reference for the study of pollen and climate change in the Amazon Basin.
Criterion (x): The numerous intact ecosystems and habitats harbour an impressive species diversity of global significance for conservation and science. Even though only limited research has been conducted in these forests and grasslands, more than 5,000 plant species have been recorded, almost 1,000 in the grasslands alone. The inventory of the fauna is likewise incomplete, taxonomic studies routinely yield species previously unknown to science, including vertebrates, such as reptiles, amphibians and even small mammals. The more conspicuous mammal fauna includes Spectacled Bear, Giant Armadillo, North Andean Deer, Jaguar and several other cat species. Out of the at least five primate species, the critically endangered Yellow-tailed Woolly Monkey stands out, as its future seems intricately linked to the future of Rio Abiseo National Park. Hundreds of bird species and countless arthropods are distributed across the many habitats and ecological niches. Endemism is high across many taxonomic groups and many species of flora and fauna are rare, some threatened or even in danger of extinction.
Integrity
Much of Rio Abiseo National Park cannot easily be accessed; most was practically inaccessible after the original inhabitants abandoned it and until the first modern dirt roads reached the area starting in the 1960s. To this day, very few people entre the more rugged parts of the protected area. The boundaries of Rio Abiseo National Park are plausible, as they include a wealth of natural and cultural features of major conservation and research importance. By covering the entire Abiseo River basin, a natural ecological unit enjoys full formal protection; an ideal set-up provided the ambitious laws can be fully enforced. From a natural heritage perspective it is also notable that the full altitudinal gradient from the lowlands to the high Andean grasslands enjoys full protection. While the national park is surrounded by a large buffer zone, none has been formally recognized for the World Heritage property. Given the limited scientific information available about the exact distribution of biodiversity, endemism and archaeological sites, there may be opportunities to further refine the boundaries on the future, as new information about the distribution of diversity, endemism and archaeological sites becomes available. In addition, archaeological research undertaken to date suggests that the ancient settlement area extends beyond the boundaries of the National Park, into the upper valleys of the Las Palmas and Pajatén rivers. Any eventual application to extend the boundaries of the cultural site to these areas will require careful evaluation, to ensure that adequate protection and management measures are in force.
The property contains all the physical cultural features as well, from rock shelters to housing, ceremonial, production (platforms and warehouses) structure, cemeteries and roads that remain intact despite non-substantial changes primarily due to natural causes, which have caused the erosion of its material integrity. Careful attention must be paid by the responsible authorities to the conservation of excavated sites to address decay factors owing to the climatic and environmental conditions, including the risk of seismic disturbance, as well as those derived from human actions.
Authenticity
The authenticity of the archaeological remains at the Rio Abiseo National Park remains unquestionable. No significant human interventions have occurred since its abandonment in the 16th century until its rediscovery in the 19th century. The geographical configuration, isolation and the inaccessibility of the area have contributed to keeping intact the authenticity of the pre-Columbian sites. These conditions show that the diversity of archaeological sites within the various altitudes and areas of the Rio Abiseo National Park still bear witness to the process and the historical continuity of adaptation, evolution and human development in the cloud forest and the paramo of the high Andes territory, occupied extensive and rationally during a millenary historical period that extends from the pre-ceramic earlier ages until the formation of complex societies in the 15th century.
