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Forest resources

The following includes statistics and other information about forest resources in Liberia, plus some old documents and reports that may be of interest and use today.

Stibig, H J, and Baltaxe, R, 1993, Use of NOAA remote sensing data for assessment of the forest area of Liberia, RSC Working Paper 66, FAO, Rome. In the context of developing a practicable and cost effective method for obtaining a country’s forest area by remote sensing, the computer processing of NOAA AVHRR HRPT data covering Liberia was investigated. The only cloud-free scene then recorded turned out to be severely and unevenly affected by atmospheric haze. To mitigate the effects of this, the country was divided into six areas (strata) of more uniform haze conditions. Pixel DN values were obtained for forest and adjoining formations on transects within each stratum, for the first four AVHRR channels and three transforms: NDVI (2-1/2 + 1), IND3 (3-2/3 + 2), IND4(4-2/4 + 2). After analyzing the transects and comparing them with the available reference data (a mixture of large scale colour composite Landsat TM and MSS images for 1989 and 1986 respectively), channels 2, 3, 4 and IND3 were retained for processing. This was done by applying three methods to each stratum - thresholding, maximum likelihood classification using clustering signatures (hybrid), m.l.c. using training area signatures - and directed at separating the 5 main classes distinguishable on the Landsat images: Closed forest, Disturbed forest, Shifting cultivation and regrowth, Cultivation and Other. PDF file (320 KB).

Hammermaster, E T, 1985, Forest resources mapping of Liberia, FAO Field Document, FAO, Rome. This report covers the work of forest resources mapping undertaken by the Remote Sensing Unit of the Forestry Development Authority of Liberia between March 1982 and June 1984. Its principle aim is to reassess the actual forest cover area of Liberia by interpretation of recent aerial photography and the subsequent transfer of this photo detail to 1 in 125,000 map series. The procedures adopted for this mapping study are detailed. In conjunction with this work a deforestation study was also carried out using the same selected areas from each of the 1953, 1969 and 1979/82 aerial photography series. The results of these studies are discussed and related to previous estimates that have been made. The results include information about forest areas (by forest type and in three slope classes). PDF file (169 KB).

Bell, R H V, and McShane-Caluzi, E, (editors), 1984, Liberia country report, in proceedings of the workshop: "Conservation and wildlife management in Africa", Kasungu National Park, Malawi, October 1984. This short report presents an overview of the physical, biological and climatic conditions in Liberia and a brief history of forest conservation in the country. Zip file (22 KB).

Verschuren, J, 1983, Conservation of tropical rain forest in Liberia, IUCN, Gland. This report was prepared for the IUCN-WWF Technical Meeting on the Conservation of Biotic Communities of West and Central Africa, held at Ouagadougou, Upper Volta, 4 - 10 February 1980. It takes stock of the existing situation regarding nature conservation, wildlife and national parks in Liberia, and puts forward several proposals to remedy the situation described. Urgent measures are absolutely necessary or the point of no return will be reached in Liberia, with all the economic and ecological consequences which that implies. The author is convinced that the setting up of the Forestry Development Authority (FDA) in 1976 and the great interest in conservation shown by the highest authorities of Liberia will allow for the forest ecosystem in Liberia to be saved before it is too late. The report recommends a series of measures - legislative, institutional and management - which it is hoped will provide a basis for long-term conservation of fauna and flora in Liberia.PDF file (768 KB).

Jansen, J W A, 1974, Timber trees of Liberia. This book contains information about 27 economically important tree species in Liberia. It includes a botanical description of each species and a description of some of the woodworking properties and main uses of each species. It also contains diagrams of fruit, seed and leaves and some photographs of the trees. The book is a joint publication of FAO and the University of Liberia. PDF file (1,470 KB).

Sachtler, M, 1968, General report on national forest inventory in Liberia. This report describes the forestry conditions of Liberia to the extent possible on the basis of the inventory work and associated studies. Initially, the inventory methods, in particular the problems of data collection and data evaluation, are described in the report. The climate of Liberia is discussed in detail, as it has a major influence on the distribution of tree species, and certain climatic regions are defined. Vegetation zones, forest types, the influence of human settlement and of the animal world on the structure of the closed forest are described and a calculation of the total area of closed forest has been derived from these data. The report assesses how much of the closed forest area will finally be exploitable and presents a short description of the condition of forest regeneration. The report is a publication of the German Forestry Mission to Liberia. PDF file (3,398 KB).

German Forestry Mission to Liberia, 1967, Code for the Inventory: Technical Report No. 2. This report describes the methodology used for the inventory of Liberian National Forests. PDF file (635 KB).