Table 3.
Estimates of gross loss and gain of forest cover and net change (in 106 ha, ± standard error) from 1990 to 2000 for the whole dry African region and the two sub-ecoregions. The annual rates of change are given in italics (total area of change divided by the time period and by the average total area of cover over the two dates)
| Whole region | Sudanian | Zambezian | |||||
|---|---|---|---|---|---|---|---|
| Total tree cover (dense + open) | Gross loss | −12.3 ± 0.9 | 0.46% | −2.9 ± 0.5 | 0.48% | −9.4 ± 0.7 | 0.45% |
| Gross gain | 3.2 ± 0.3 | 0.12% | 1.4 ± 0.2 | 0.23% | 1.8 ± 0.2 | 0.09% | |
| Net change | −9.1 | 0.34% | −1.5 | 0.25% | −7.6 | 0.37% | |
| Other wooded land | Gross loss | −18.7 ± 0.9 | 0.42% | −12.8 ± 0.8 | 0.46% | −5.9 ± 0.5 | 0.34% |
| Gross gain | 9.8 ± 0.5 | 0.22% | 6.9 ± 0.5 | 0.25% | 2.9 ± 0.3 | 0.17% | |
| Net change | −8.9 | 0.20% | −5.9 | 0.21% | −3.0 | 0.18% | |
| Dense to open tree cover | Gross loss | −4.9 ± 0.4 | 0.40% | −0.5 ± 0.1 | 0.32% | −4.4 ± 0.4 | 0.41% |
| Gross gain | 1.0 ± 0.1 | 0.08% | 0.2 ± 0.1 | 0.13% | 0.8 ± 0.1 | 0.08% | |
| Net change | −3.9 | 0.32% | −0.3 | 0.19% | −3.6 | 0.34% | |