Sekercioglu (2002) Effects of forestry practices on vegetation structure and the bird community of Kibale National Park, Uganda

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Effects of forestry practices on vegetation structure and the bird community of Kibale National Park, Uganda

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CONTRIBUTORS:

Author:

Sekercioglu, Cagan H. (Stanford University)

JOURNAL:

Biological conservation, 107(1), 229 - 240.

YEAR:

2002

PUB TYPE:

Journal Article

SUBJECT(S):

Tropical forestry, Selective logging, Vegetation structure, Bird communities, Deforestation, Disturbance, Mistnetting, Bird counts, Insectivores

DISCIPLINE:

Ecology

HTTP:

http://jasper1.stanford.edu/~cagan/abstracts.htm

LANGUAGE:

English

PUB ID:

103-391-737 (Last edited on 2003/06/26 15:11:20 GMT-6)

SPONSOR(S):

ABSTRACT:
I examined the lingering effects of past timber management practices on the vegetation structure and bird community of Kibale National Park, Uganda. I compared four forest treatments: unlogged native forest, two that were selectively logged at low and high intensities in 1960’s and a conifer plantation. Forest-dependent birds were best represented in unlogged plots. Lightly-logged plots were similar to unlogged plots in both vegetation structure and bird community composition, although some forest-dependent bird species were missing from the former. Heavily-logged plots had significantly less canopy cover and lower tree density than other plots as a result of the combination of extensive secondary damage and natural disturbance patterns that prevented the reclosure of the forest canopy. Over 30% of the forest-dependent bird species observed during the study were not detected in heavily-logged plots. In plantation plots, bird species richness and bird abundance were about a third of those observed in other plots. There were significant correlations between horizontal heterogeneity of vegetation and abundance and species richness of birds across plots. Abundance and species richness of all, forest-dependent and forest generalist birds were highest in plots with intermediate measures of horizontal heterogeneity, which were mostly unlogged or lightly-logged. If reduced-impact logging practices are not implemented during selective logging operations in tropical forests, consequent long-term changes in vegetation structure may result in significant declines in the populations of some forest-dependent species, as was observed in Kibale forest.

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