Partial harvests in the boreal forest: response of the understory vegetation five years after harvest
Bibliographic record
Abstract
In the eastern boreal forest of Canada long fire cycles allow for a significant portion of stands to become old growth. Theseold-growth boreal forest stands are subjected to secondary disturbances that create uneven structure, which supports avariety of types of organisms. In order to maintain the proportion of stands with uneven structure on the landscape, partialcuts have been suggested as a management technique that could create or maintain these uneven structures. This studycompares the effects of partial and low-retention harvests and un-harvested control on understory plants in four sites fiveyears after harvest. The relative abundance of species was examined by a habitat group. While richness did not vary amongtreatments, increasing severity of harvest favoured pioneer species that prefer disturbed mineral soil and high light levels.Sites with thicker organic layers that were harvested in the winter were significantly less impacted by both partial and lowretentionharvest. Canopy opening alone had little impact in the three most northern sites. As old-growth black spruceforests are open by nature, this suggests that soil perturbation is a bigger driver of community change after harvest thanproportion of canopy removed for this forest type. Key words: Quebec, Picea mariana, harvest, variable retention, sustainable forest management, understory, structuralretention, vegetation
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".