Species diversity and tree size at three locations in the forests of Inwood Park censused in 1935 and 2005.z
| 1935 Census | 2005 Census | |||
|---|---|---|---|---|
| Species | dbh (SD) maximum | Species | dbh (SD) maximum | |
| Moist Valley | 10 | 36.01 (24.19) 91.4 cm | 13 | 46.01 (32.84) 139.7 cm |
| South Slope | 13 | 28.51 (19.02) 121.9 | 14 | 38.00 (29.84) 99.0 |
| Dry ridge | 5 | 36.70 (23.67) 101.6 | 16 | 42.25 (25.21) 125.7 |
| Total | 17 | 32.29 (21.72) 121.9 | 25 | 41.81 (28.38) 139.7 |
| Two-way ANOVA | ||||||
|---|---|---|---|---|---|---|
| Effect | df | SS | F | P | R2 | |
| Date | 1 | 5,388 | 8.19 | 0.0045 | 0.022 | |
| Site | 2 | 3,836 | 2.915 | 0.0555 | 0.016 | |
| Date × site | 2 | 321 | 0.244 | 0.78 | 0.001 | |
| Unexplained | 352 | 231,577 | 0.951 | |||
| Total | 357 | 243,577 | ||||
↵zResults from 25 10 m × 10 m quadrats at each census. In the 1935 census, some taxa were identified only to genus (Table 1). Species number, mean dbh with SD, and maximum. The data are the upper table is analyzed by two-way ANOVA below.
dbh = diameter at breast height; SD = standard deviation; ANOVA = analysis of variance; SS = sum of squares for dbh.