By P. van der Hout
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Additional resources for Reduced Impact Logging in the Tropical Rain Forest of Guyana: Ecological, Economic and Silvicutural Consequences (Tropenbos Guyana series)
Sample text
Successful application demands that regeneration should occur throughout the forest. The applicability of the system rests on a high proportion of shade bearers, which is linked to the region of origin, the Fagus - Picea - Abies mixed forests in Central Europe (but see Kuper 1994). The system also requires nearby markets for both large and small produce and a large number of skilled foresters. Clearly, the conditions faced by Brandis were quite different. He was mainly concerned with a single species in poly-specific forests.
Between 1908 and 1916 a total of 34 expeditions were made covering all of the easily accessible forest areas (Welch et al. 1975). Up until 1919 there were no leases, timber, firewood, charcoal and Balata being exploited under a licensing system. A revision of the Crown Lands Regulations made the issuing of woodcutting leases possible. These amended Regulations were primarily designed to safeguard revenue and there was little attempt to control woodcutting operations (Swabey 1950). With the increase in volume and complexity of duties regarding the forests and the forest industry - by this time the number of steam sawmills had increased to 20 - it became obvious that more staff was needed.
Neither is much known about the growth rate of their seedlings 24 Chapter 2: Tropical rain forest logging and silviculture nor the ability to respond repeatedly to release from shade suppression until they attain maturity. Predicting the future composition of selectively logged forest is therefore not very easy. However, there are clear indications about the restrictions that should be imposed on a logging operation. There is unmistakable evidence that (undesirable) pioneer species will colonise gaps once they are overly large, whereas small gaps are often closed by lateral expansion of surrounding trees.