Table 3.
Correlation coefficients between growth and Δ13C for understory and canopy trees for the three sites; within tree correlations are calculated as the mean of individual tree correlations that have at least eight data points using raw and detrended data; correlations between trees consist of correlations between the mean growth and mean Δ13C in the understory and canopy life stages; understory is defined as trees smaller than 30, 20 and 15 cm in diameter for Bolivia, Yucatan and Oaxaca, respectively; values between brackets for the within-tree correlations give the standard error of the variation between trees in correlation coefficients. ns, *, P< 0.05.
| Mean correlation (r) within trees | Correlation (r) between trees | ||||||
|---|---|---|---|---|---|---|---|
| Raw data | Detrended data | Raw data | |||||
| Understory | Canopy | Understory | Canopy | Understory | Canopy | ||
| Bolivia | −0.50 (0.08) | −0.07 (0.08) | −0.11 (0.06) | −0.01 (0.06) | −0.70* | 0.09ns | |
| Yucatan | −0.18 (0.14) | 0.41 (0.09) | 0.06 (0.10) | 0.43 (0.07) | −0.59ns | 0.19ns | |
| Oaxaca | −0.35 (0.4) | 0.18 (0.13) | 0.00 (0.08) | 0.19 (0.10) | −0.57ns | −0.71ns | |