Table 1. Evolution of the exploitable stock of two main commercial species logged in the Central African Republic (CAR; Entandrophragma cylindricum and Triplochiton scleroxylon) under the current felling regime. Species and logging rules Actual rules Sustainable system Logged (individuals/ha ≥ DCL) at first cut Recovered after 1 cycle Recovered (%) Logged (individuals/ha) at cycle 10 Mean logged per cycle, for 10 cycles Proportion of stock removal at each cycle†   Logged (individuals/ha ≥ DCL) at first cut Mean logged in stabilized system, per cycle, for 10 cycles E. cylindricum DCL: 80 cm dbh Proportion of stock removal†: 89% M'Baïki 70% (compared to 89%)   Number 1.42 0.21 15.1 0.24 0.45   1.10   0.56 Volume (m3) 24.29 3.87 15.9 3.25 6.68   18.96‡ 9.09                 Forest concession   Number 0.32 0.16 49.3 0.12 0.18   0.25   0.22 Volume (m3) 4.28 2.17 50.7 1.49 2.44     3.34‡ 3.32                       T. scleroxylon DCL: 80 cm dbh Proportion of stock removal†: 95% M'Baïki 45% (compared to 95%)   Number 1.58 0.67 42.3 0.09 0.45   0.75   0.67 Volume (m3) 29.07 8.60 29.6 1.15 6.51   13.80‡ 14.70                 Forest concession   Number 0.80 0.25 31.2 0.06 0.23   0.38   0.35 Volume (m3) 12.57 3.24 25.8 0.67 3.16     5.97‡ 7.28 Note: The felling cycle is 30 years. Number of trees ≥ diameter cutting limit (DCL) and corresponding volumes are predictions made using a stochastic matrix model calibrated with data from the M'Baïki experimental site in the CAR (methods are described in Gourlet-Fleury et al. 2004, 2005). On this site, the two species were logged on 12 ha. Predictions were also made for a forest concession located in the CAR, using data from a management survey performed in 2004. Volume equations used were site specific. †Percentage of the number of standing trees ≥ DCL in the forest. ‡Respectively, 78% (E. cylindricum) and 47% (T. scleroxylon) of the number of trees or volume harvested at first cut under the current felling regime. The sacrifice at first cut would thus be 22% (E. cylindricum) and 53% (T. scleroxylon) of the commercial volume.