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Table 4 Mean number of trees per hectare per diameter class (trees dbh ≥ 5 cm) and height strata (trees dbh ≥ 10 cm) before and after harvesting. Diameter classes and height strata are explained in Table 3. Values are expressed as mean ± 1 standard deviation. Significant treatment differences with the control are shown through an asterisk after the mean number of trees, with *p = 0.05–0.01, **p = 0.01–0.001 and ***p ≤ 0.001, respectively. Significant harvesting impacts are mentioned in the text

From: Short-term effects of single-tree selection cutting on stand structure and tree species composition in Valdivian rainforests of Chile

  Control High residual basal area (HRBA) Low residual basal area (LRBA)
Before After Before After
Diameter class
 Total 1039 ± 252 1579 ± 301* 1491 ± 295* 1455 ± 202* 1331 ± 190
 Very small 494 ± 166 895 ± 167** 861 ± 164* 849 ± 140* 818 ± 156*
 Small 258 ± 115 446 ± 141* 429 ± 130 384 ± 50 363 ± 53
 Intermediate 175 ± 29 134 ± 31 126 ± 27* 130 ± 11* 101 ± 18**
 Large 89 ± 33 90 ± 27 68 ± 14 88 ± 41 48 ± 12*
 Very large 22 ± 13 14 ± 15 8 ± 6 5 ± 4 3 ± 3*
Height stratum
 Total 533 ± 137 624 ± 141 510 ± 58
 Low understorey 42 ± 32 84 ± 43 75 ± 35
 Upper understorey 114 ± 62 271 ± 90* 211 ± 35
 Low canopy 172 ± 72 195 ± 75 159 ± 52
 Upper canopy 136 ± 36 55 ± 21** 55 ± 12**
 Emergent 72 ± 39 19 ± 22* 10 ± 8*