Study

Long-Term effects of logging on African primate communities: a 28-year comparison from Kibale National Park, Uganda

  • Published source details Chapman C.A., Balcomb S.R., Gillespie T.R., Skorupa J.P. & Struhsaker T.T. (2000) Long-Term effects of logging on African primate communities: a 28-year comparison from Kibale National Park, Uganda. Conservation Biology, 14, 207-217.

Actions

This study is summarised as evidence for the following.

Action Category

Use selective logging instead of clear-cutting

Action Link
Primate Conservation
  1. Use selective logging instead of clear-cutting

    A site comparison in 1968-1996 in three evergreen forests in Uganda found that light selective logging (5.1 stems/ha) did not affect average primate group densities and group sizes of blue monkey Cercopithecus mitis, redtail monkey Cercopithecus ascanius, Ugandan red colobus Procolobus tephrosceles, and grey-cheeked mangabey Lophocebus albigena when compared to populations in heavy selected logging (7.4 stems/ha) areas. However, group density of eastern black-and-white colobus (BWC) Colobus guereza was lower in the light selective logging area in 1980-1981 (3.31 vs 4.81 groups/km2) and in 1996-1997 (4.83 vs 9.12 groups/km2) than in the heavily logged area. BWC had higher group densities in the light selective logging area than in the unlogged area (1980/81: 3.31 vs 0.89 groups/km2; 1996/97: 4.83 vs 2.00 groups/km2). Heavy selective logging resulted in lower group densities compared to unlogged and light selective logging for red colobus (1980-1981: 3.08 vs 5.46 and 5.78 groups/km2) and redtail monkeys (1980-1981: 2.21 vs 5.58 and 7.03 groups/km2; 1996-1997: 1.04 vs 4.83 and 11.48 groups/km2). Relative abundance (number of groups seen/ km surveyed) in heavy selective logging decreased between surveys conducted in 1980-1981 to 1996-1997 for red colobus (0.567 vs 0.292), BWC (1.144 vs 0.542), redtail monkey (0.589 vs 0.094), and blue monkey (0.337 vs 0.021), but only for red colobus in lightly logged forests (0.710 vs 0.459) over the same period. BWC relative abundance decreased in unlogged areas from 0.23 in 1970-1972 to 0.11 in 1974-1967 and 0.11 in 1980-1981 but increased for grey-cheeked mangabeys (1970-1972: 0.12; 1980-1981: 0.16). Surveys used line transect methods to assess primate densities across three forestry compartments with heavy-, light- and no selective logging in the late 1960s. The unlogged area was surveyed in 1970-1976. Survey effort and data collection methods were comparable.

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