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Effects of Sawmilling Activities on Vegetation Characteristics in Isokan Area of Southwestern Nigeria

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Author(s): S.O. Oke | P.F. Oyedare

Journal: International Journal of Botany
ISSN 1811-9700

Volume: 2;
Issue: 2;
Start page: 163;
Date: 2006;
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Keywords: Vegetation characteristics | sawmills Southwestern Nigeria | Sawdust | plant species

ABSTRACT
The effects of sawmilling activities on vegetation characteristics were investigated in Isokan Local Government Area of Osun State, Southwestern Nigeria. Six sawmills were randomly selected in the area and from each sawmill, five dominant plant species around the sawmills were also selected at the site at an increasing distance of 0, 50, 100, 150 and 200 m away from the sawmillings. The chlorophyll content, leaf area and stomata number of the selected dominance plant species were studied in dry and rainy seasons. The chlorophyll concentration of the common plants, leaf area and stomata number on both adaxial and abaxial surfaces at various distances starting from 0 to 200 m were subjected to analysis of variance. Some species showed significant difference in the vegetation parameters/characteristics investigated in relation to distances while some did not. The particulate matters generated from the sawmills caused reduction in chlorophyll concentration of most of the surrounding individual plants. The implication of these observations were discussed.
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