Table 2. Mean canopy height (± standard deviation) of forests on depositional-floodplain (DFP) and erosional terra firme (ETF) substrates (see Table 1), along with Zeta distribution (power-law) exponents (λ) of the gap-size frequency distributions for each site.
| Block | DFP Substrates | ETF Substrates | ||||
| Height (SD) | λ1 | λ20 | Height (SD) | λ1 | λ20 | |
| 1 | 22.5 (9.3) | 1.93 (9020) | 1.81 (71751) | 23.6 (8.8) | 1.95 (44803) | 1.87 (614784) |
| 2 | 21.8 (8.3) | 1.93 (2755) | 1.96 (29367) | 22.9 (8.5) | 2.00 (8979) | 1.84 (115469) |
| 3 | 21.6 (9.6) | 1.95 (43144) | 1.90 (311181) | 24.8 (9.2) | 1.98 (20491) | 1.80 (347253) |
| 4 | – | – | – | 22.5 (10.7) | 1.73 (175825) | 1.76 (613018) |
| 5 | 23.9 (8.7) | 1.97 (9137) | 1.83 (91764) | 24.9 (7.8) | 1.93 (38004) | 1.72 (450834) |
| 6 | 20.6 (8.8) | 1.81 (36329) | 1.81 (178283) | 23.4 (8.1) | 1.82 (24669) | 1.68 (160665) |
| 7 | 12.1 (11.5) | 1.70 (331647) | 1.87 (307547) | 22.0 (8.4) | 1.75 (9238) | 1.72 (33536) |
| 8 | 19.0 (9.8) | 1.89 (150971) | 1.86 (483723) | 23.7 (8.4) | 1.85 (24212) | 1.65 (173344) |
| 9 | 15.4 (11.9) | 1.80 (138192) | 1.92 (271617) | 21.6 (8.4) | 1.85 (1461) | 1.74 (11661) |
| 10 | 18.0 (7.5) | 1.71 (4916) | 2.03 (3317) | 22.3 (7.5) | 1.74 (44851) | 1.85 (35987) |
| 11 | 20.3 (7.2) | 1.88 (28985) | 1.72 (261803) | – | – | – |
| 12 | 20.2 (10.5) | 1.78 (146413) | 1.74 (439677) | 22.5 (6.5) | 1.91 (5995) | 1.63 (57901) |
| 13 | 19.5 (10.3) | 1.80 (38208) | 1.75 (122226) | 21.0 (6.4) | 1.88 (3343) | 1.74 (26605) |
Values are provided for gaps reaching to the ground level (λ1 or ≥1 m) and for gaps found only in the upper canopy (λ20 or ≥20 m). Values in parentheses indicate the number of gaps mapped in each landscape.