Ecology and Development Series No. 10, 2003 - ZEF

Conservation of the wild Coffea arabica populations in situ6.3.3 Reserve suitability and zonesThe areas suitable for a reserve around Yayu and their degree of suitability are mapped(Figure 6.5). The summary of the results of zoning and reserve suitability classification arepresented in Tables 6.5 and 6.6. From all possible solutions of the order-weighted average(OWA), the result obtained by using order weights 0.6, 0.25, 0.15 was used for the finalzoning of the reserve, as the resulting suitability map included much of the undisturbed forestand was nearly a risk-averse solution with an ANDness of 0.725 (Figure 6.5; Table 6.4).The OWA2 (without constraint) option of reserve suitability (Figure 6.5a) showsthe potential forest areas that could fall within the three suitability classes. However, mostareas in the landscape are currently used by the local people for coffee production, farmingand settlement (Figure 6.4). Using such areas as constraint resulted in the suitability mapOWA1 in Figure 6.5b. Exclusion of such areas reduced the areas in different suitabilityclasses available for the reserve (Table 6.5).Table 6.5. Areas (in ha) in different reserve suitability classes. Note: *-stands formultiplication. B- available for conservation, while C or Constraints are areas usedby local people, and not available for strict conservation.Highly Moderately Slightly TotalSuitable suitable suitable areaA. Total area without constraint (OWA-2) (= B+C) 16754 15564 4268 36586B. Undisturbed natural forest (OWA1) 8030 2167 1 10198a. Percent undisturbed forest of total (=a/A*100) 21.9 5.9 0.0 27.9C. Areas of constraint (=b+c) 8724 13396 4267 26387b. Farm and settlement 4229 10263 2292 16784c. Forests managed for coffee production 4495 3133 1975 9603d. Percent farm and settlement of total (=b/A*100) 11.6 28.1 6.3 45.9e. Percent managed forest of total (=c/A*100) 12.3 8.6 5.4 26.2f. Percent of constraint areas to the total (=C/A*100) 23.8 36.6 11.7 72.1About 22% and 6% of the total area of the landscape fall into the classes ‘highly’and ‘moderately’ suitable for reserve, respectively. The highly and moderately suitable areascover almost the entire undisturbed forest, which is about 28% of the total landscapeconsidered in this study (Table 6.5). The local people currently use about 72% of the area,either as managed forests for coffee production (26%) or as farmland and settlement areas(46%).117