Fig. 4. Forest fragmentation in three study areas, estimated from analysis of satellite remote-sensing imagery. Two measures of fragmentation are presented: (a) mean patch size, (b) patch density. Symbols: filled circle, Los Muermos; filled triangle, Chiapas; empty square, Maule. Values were also obtained for Central Veracruz (not illustrated) for two dates, where mean patch size declined from 1176 ha in 1984 to 1291 ha in 2000, and patch density declined from 0.013 to 0.009 over the same period.