Table 4. Recovery of demographic parameters after the first logging cycle for D. odorata.
MCD (cm) | Logging intensity (%) | Logging cycle (years) |
Demographic parameters |
||
---|---|---|---|---|---|
Basal area m2 ha−1 (%) | Number of trees (>10 cm d.b.h.) (%) | Reproductive trees (>35 cm d.b.h.) (%) | |||
50 | 10 | 30 | 92 | 94 | 92 |
60 | 92 | 95 | 93 | ||
100 | 94 | 97 | 96 | ||
30 | 30 | 75 | 84 | 77 | |
60 | 79 | 88 | 82 | ||
100 | 84 | 92 | 88 | ||
50 | 30 | 59 | 75 | 62 | |
60 | 64 | 79 | 69 | ||
100 | 72 | 86 | 79 | ||
70 | 30 | 40 | 64 | 46 | |
60 | 47 | 71 | 56 | ||
100 | 58 | 79 | 69 | ||
90 | 30 | X | X | X | |
60 | X | X | X | ||
100 | 37 | 70 | 55 | ||
100 | 10 | 30 | 95 | 97 | 96 |
60 | 96 | 98 | 98 | ||
100 | 97 | 99 | 99 | ||
30 | 30 | 87 | 94 | 91 | |
60 | 91 | 96 | 95 | ||
100 | 96 | 98 | 99 | ||
50 | 30 | 76 | 90 | 86 | |
60 | 86 | 95 | 93 | ||
100 | 94 | 98 | 98 | ||
70 | 30 | 66 | 87 | 80 | |
60 | 79 | 93 | 90 | ||
100 | 91 | 97 | 97 | ||
90 | 30 | 53 | 82 | 72 | |
60 | 68 | 89 | 84 | ||
100 | 84 | 96 | 94 |
Abbreviations: d.b.h., diameter at breast height; MCD, minimum cutting diameter at breast height; logging intensity, % of trees removed above MCD; X, no result because of population collapse.
Standard deviations of control population are 0.001 (2%), 4.2 (1%) and 3.4 (2%) for 30-year cycle, are 0.002 (3%), 4.8 (1.8%) and 4.2 (2.5%) for 60-year cycle and are 0.003 (4%), 5.5 (2%) and 5.1 (3%) for 100-year cycle for basal area, number of individuals and number of reproductive individuals, respectively.