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ANOVA comparisons performed among the threshold temperatures occurring when the probability of xylem growth in black spruce being active was 0·5; thresholds were estimated on a dataset of cambial phenology collected during 2002–2010 in the boreal forest of Quebec, Canada. Values are means ± s.d.
| Threshold temperature (°C) | SIM | BER | MIS | DAN | F-value | P |
|---|---|---|---|---|---|---|
| Minimum | 4·2 ± 1·0 | 4·0 ± 1·9 | 5·4 ± 1·3 | 4·0 ± 1·3 | 2·68 | 0·06 |
| Maximum | 15·1 ± 0·7 | 15·2 ± 1·4 | 16·3 ± 1·4 | 15·4 ± 1·4 | 1·64 | 0·19 |
