The application of biogeographical techniques to forest site-factor analysis
In southern Africa, stratified, closed canopy forests are regarded as relict from former wetter phases. In the eastern Cape such forests are found on the slopes of the Great Escarpment and at one coastal site at Alexandria. This forest is anomalous
with regard to its coastal situation, substrate, climatic environment and geographical location. Results point to water availability as the principal control of forest distribution in the Alexandria area. (AJC).
Site conditions and distribution of forest ecosystems in Sierra Leone
The article deals not only with forest ecosystems but also with main physical regions of Sierra Leone, with vegetation zones, geological situation, rainfall and run-off conditions. There is given a map of forest ecosystems. - (IH)
A further 12 species of tree brave been identified from leaf fossils preserved in terminal Pleistocene-early Holocene lacustrine sediments exposed above the present shore of Lake Bosumtwi. Our earlier finding has been confirmed that forest
was of Dry Semi-deciduous type, similar to the present-day forest of this area. The early Holocene forest may, however, have been more open than its modern counterpart. It is suggested that the relative openness of this forest may have been maintained
by periodic invasion of fire from grasslands that formely bordered the forest. Continuous forest did not become established in the Bosumtwi area until mid-Holocene times (7500-5000 BP).
Although still densely forested, the vegetation of the island has been drastically modified by human intervention during the past 300 years. Little is left of the lowland coastal forest, except in the small reserve of Saint Philippe. The hill
forests still cover most of the mountain slopes between 700 and 1300m above sea level, although some tree species have suffered from overexploitation in the past. The open forest of the endemic tree, le Tamarin des hauts (Acacia heterophylla), is found
between 1300 and 1800m above sea level, in the highest ranges. The biology of this tree and the successful techniques devised by the Reunion Forest Service to ensure its regeneration after forest fires or landslides are described.
Effects on mill location, size and input characteristics on the economic efficiency of Kenya's forest industries
The actual rate of develoment of Kenya's forest industries is considerably lower than the potential rate, owing to constraints such as high transportation costs, quality deficiencies, and non-competitive prices. We suggest that these constraints
, and related attributes. Four distinctive patterns of relationship are revealed. The implications of thease relationships are analysed with respect to the present locational and other geographic aspects of forest industries as well as future prospects