Comparative Analysis of the Climatic Response of Seven Boreal Tree Species from Northwestern Québec, Canada
Bibliographic record
Abstract
We analyzed the radial growth response of seven boreal tree species growing on an island of Lake Duparquet, northwestern Québec. The species investigated were Betula papyrifera, Abies balsamea, Thuja occidentalis, Picea glauca, Picea mariana, Pinus banksiana and Pinus resinosa. Seven species chronologies were developed as well as seventy individual tree chronologies. Coniferous species were positively correlated to warm April and to cool-wet July. This indicates that early spring and positive water balance during the growth season favor radial growth. In contrast, the radial growth of B. papyrifera was mainly correlated to June precipitation. The response of individual trees to climate was variable but the differences between B. papyrifera and the coniferous species were maintained. No microsite factors or tree characteristics were associated with this variability. Except for B. papyrifera, it is speculated that climate change could have a similar qualitative physiological consequence on the growth of coniferous species found on homogeneous insular landscapes.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".