Moukalaba-Doudou

Moukalaba-Doudou National Park encompasses a diverse landscape ranging from coastal savannas and lowland rainforest to the rugged peaks of the Doudou Mountains in southwestern Gabon. Established in 2002, the park covers approximately 4,500 square kilometers, making it one of the country's largest protected areas. The park is notable for its topographic diversity, rising from near sea level to over 800 meters in the Doudou range, and for hosting one of the highest densities of western lowland gorillas recorded anywhere. Japanese researchers from Kyoto University have conducted long-term primate research here since the 1990s, providing detailed knowledge of gorilla ecology and behavior in a mixed forest-savanna landscape.

Moukalaba-Doudou supports remarkably high gorilla densities, with survey estimates of 4-5 individuals per square kilometer in optimal habitat — among the highest recorded for any gorilla population. Chimpanzees coexist with gorillas throughout the forest, along with 12 other primate species including mandrills, colobus monkeys, and talapoins. Forest elephants use the park's diverse habitats, moving between forest and savanna areas. The savanna-forest ecotone supports buffaloes, various duiker species, and red river hogs. Leopards are present as the primary large predator. The Doudou Mountains harbor montane bird species not found in the lowlands, while the coastal savannas support bustards and other open-country birds. Streams draining the mountains contain diverse fish and amphibian communities with potentially endemic species in the higher elevations.

The park's vegetation spans multiple ecological zones created by its altitudinal range and proximity to the coast. Lowland coastal savannas in the west are dominated by Hyparrhenia and Andropogon grasses maintained by seasonal fire. Dense lowland rainforest covers the majority of the park, characterized by Caesalpiniaceae, Burseraceae, and Myristicaceae with typical Congolian species composition. The Doudou Mountains support submontane forest with lower canopy, increased epiphyte loads, and some montane specialist species. Gallery forests line the numerous streams descending from the mountains. Marantaceae forests — dense herbaceous formations favored by gorillas for feeding — are particularly well-developed in disturbed and regenerating areas. The variety of vegetation types within a single park creates high habitat diversity supporting the exceptional mammal densities.

The park spans two geological domains: the Precambrian basement rocks of the Doudou Mountains and the younger sedimentary formations of the coastal plain. The Doudou range consists of metamorphic rocks including schists, quartzites, and gneisses that have been uplifted relative to the surrounding lowlands. These resistant formations create the park's dramatic topography, with steep-sided valleys and exposed rock faces on the mountain flanks. The coastal plain to the west consists of Cretaceous and Tertiary sediments overlain by Quaternary sands. Iron-rich laterite caps many elevated surfaces on both geological domains. The contrast between nutrient-poor sand soils on the coastal plain (supporting savanna) and richer soils on the mountain slopes (supporting dense forest) partly explains the park's vegetation mosaic.

The park's climate varies with elevation and distance from the coast. Coastal areas receive approximately 1,800-2,000 millimeters of annual rainfall with a distinct dry season from June to September influenced by the Benguela Current. The Doudou Mountains receive higher rainfall, estimated at 2,500-3,000 millimeters, as moist maritime air is forced upward over the range. Cloud and mist are common on upper slopes. Temperatures average 24-28 degrees Celsius in the lowlands but are several degrees cooler at elevation. The dry season is pronounced in the savanna portions but less so in mountain forests, which retain moisture from orographic cloud capture. Fire is an important ecological factor in the savannas during the dry season, both from lightning and traditional burning practices.

The region has been inhabited by Punu, Nzebi, and Vili peoples who developed distinct economies adapted to the varied landscape. Coastal communities focused on fishing and salt production, while interior groups practiced shifting cultivation and forest product extraction. The Doudou Mountains held spiritual significance for surrounding communities, with sacred sites on certain peaks. During the colonial period, a railway was planned through the area but never completed, and the region remained relatively undeveloped. Traditional land management practices, including controlled savanna burning and rotational agriculture, shaped the landscape mosaic visible today. Relations between communities and the park authority have evolved through co-management initiatives that seek to balance traditional resource use with conservation objectives.

Moukalaba-Doudou was gazetted as a national park in 2002, incorporating areas that had previously held various levels of protection as hunting reserves and forest concessions. Japanese researchers from Kyoto University initiated gorilla and chimpanzee research in the Moukalaba sector in 1997, providing scientific justification for the area's high conservation value. The collaborative research program has continued uninterrupted, producing numerous publications on great ape ecology, behavior, and conservation. Since establishment, the park has developed a management infrastructure supported by partnerships with ANPN, international research institutions, and conservation NGOs. The Doudou Mountain sector remains less studied and less managed than the lowland Moukalaba sector, presenting opportunities for expanded research and protection efforts.

The Moukalaba sector offers gorilla and chimpanzee tracking with habituated groups that tolerate close observation, providing intimate primate encounters rivaling those of East Africa but in a West African forest context. Forest walks through the lowland rainforest reveal diverse primates, birds, and plant communities with experienced guides. The savanna-forest interface provides open landscape viewing of wildlife including elephants and buffaloes at dusk. The Doudou Mountains offer challenging hiking through montane forest to elevated viewpoints overlooking vast forest panoramas. Birdwatching is productive throughout, with the altitudinal range providing diverse avifaunal communities. River excursions along forested waterways offer a different perspective on the ecosystem. The combination of great ape encounters and landscape diversity makes Moukalaba-Doudou one of Gabon's most rewarding wildlife destinations for those willing to accept basic conditions.

The park is accessible from the town of Tchibanga in Nyanga Province, reachable by road from Libreville (approximately 10 hours via the national highway through Mouila) or by air to the local airstrip. From Tchibanga, unpaved roads lead to the Moukalaba sector research station where basic accommodation and camping facilities exist. The Doudou sector is more remote and lacks visitor infrastructure. A 4x4 vehicle is essential year-round, and some river crossings require fording during the wet season. The dry season from June to September provides the best travel conditions and most comfortable temperatures. Gorilla tracking must be arranged in advance through ANPN, and group sizes are limited to minimize disturbance to habituated animals. The park's remoteness means visitors should be prepared for basic conditions and limited communications.

Moukalaba-Doudou faces threats from bushmeat hunting by communities in and around the park, particularly targeting primates and small ungulates. Logging concessions adjacent to the park create access roads that facilitate illegal hunting and fragment habitat corridors. Mining exploration for manganese and iron ore in the broader region poses future risks if developed near park boundaries. The gorilla habituation program, while valuable for research and tourism, creates disease transmission risks that require strict visitation protocols. Fire management in the savanna portions requires coordination with traditional burning practices to maintain ecological function without degrading forest edges. The long-term Kyoto University research program provides essential monitoring data on primate populations and forest dynamics. Community development programs aim to reduce dependence on park resources by supporting alternative livelihoods.