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Focusing on the contested issue of trees and forests, this paper looks at various ways in which historians have explored environmental change and human agency in Africa. It looks in particular at the colonial period and positions the case of the Cape Colony (South Africa) in a broader historiographical context. Colonial silviculture involved both the appropriation of the natural forests and the creation of exotic plantations. These policies generated a mixture of reactions from African communities and had varying effects on the environment. Colonial science and the projects it gave rise to have since been critiqued, contributing to the promotion of community-based forestry schemes that try to incorporate indigenous knowledge and ideas about land use. [ABSTRACT FROM AUTHOR]

A procedure is required for ecosystem studies which is ordered but flexible and directs workers quickly and inexpensively towards answers to key ecological and management questions. The procedure presented in this paper develops an increasingly complex description of the ecosystem. The initial phase consists of a structural and dynamic description of the ecosystem, followed by a description of its utilization. From this phase, key questions are elaborated and, where appropriate, mathematics models are then constructed. The South African Savanna Ecosystem Project (SASEP) provides an example of the manner in which the procedure can be applied. Examples of key ecological questions are cited, and appropriate models for some of these are described. The use of the approach, in the SASEP, is described by reference to its current objectives, defined in terms of twelve key questions. [ABSTRACT FROM AUTHOR]

Presents an index of the authors of papers published in Volume 40 of the 'African Journal of Ecology.'