The Effect of Selective Logging on the Primate Populations in the Budongo Forest Reserve, Uganda

Andrew J. Plumptre · Vernon Reynolds

236 citations0/0 files storedJournal of Applied Ecology

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Primate Behavior and Ecology Wildlife Ecology and Conservation Wildlife-Road Interactions and Conservation

Abstract

1. The Budongo Forest Reserve has been logged selectively for over 60 years. Most compartments in the Reserve have records of the volume of timber removed, the date of harvesting, and of treatments carried out to encourage regeneration of valuable timber species. 2. Line transect surveys of the five diurnal primates resident in this forest were carried out in eight of these compartments; two of which had never been logged and six of which had been harvested at approximately 10-year intervals since 1940. 3. Densities were calculated using the computer package DISTANCE. It was found that the 'Hazard Rate Model' fitted the observer-primate distance data better than other models. Densities over the whole forest were as follows: Cercopithecus mitis sthuhlmannii 43 9 km-2; C. ascanius schmidti 33.3km-2; Colobus guereza occidentalis 39.3 km-2; Papio anubis 11-7km-2; Pan troglodytes schweinfurthii 1-3km2. 4. Only C. guereza showed any significant correlation between logging date and animal density, and none of the primates showed any correlation with the volume of timber removed. For three of the primates (C. guereza, C. mitis and C. ascanius) there were significantly higher numbers in the logged compartments when compared with those that were not logged. 5. Cercopithecus mitis and C. ascanius showed significant correlations between the percentage of different forest types and the densities of the primates in each compartment. In particular there was a positive correlation with the 'mixed' forest type that foresters have been encouraging through their management practices. It is concluded that these two primates and C. guereza have benefited from logging in Budongo and that logging has had little effect on the other two primates.

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References

1987Responses of rain-forest primates to habitat disturbance: A review 1990Determinants of Variation in Tropical Forest Primate Biomass: New Evidence from West Africa 1990Comparative Ecology of Blue Monkeys (Cercopithecus Mitis) in High‐ and Low‐ Density Subpopulations

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