From prairie to forest: three centuries of environmental change at Rocky Point, Vancouver Island, British Columbia.
Bibliographic record
Abstract
Garry oak (Quercus garryana) savannas are among the most endangered ecosystems in Canada. In coastal British Columbia the vast majority of Garry oak savannas have been developed for residential, agricultural, or industrial use. Much of the remaining habitat is threatened by conifer encroachment or invasion by exotics. In this study tree-ring analysis was used to reconstruct stand composition and structure of an oak savanna at Rocky Point, on southern Vancouver Island, British Columbia. At the time of European settlement, the site was largely open prairie, with a few scattered oak trees. Establishment of Garry oak at Rocky Point began shortly after settlement of the area by Europeans—probably due to the cessation of frequent burning by indigenous peoples. Since the 1950s, however, Douglas-fir and grand fir have been encroaching on the Garry oak savanna. The causes of this invasion are unclear, but the invasion signals a clear transition in the stand structure and composition. Oak seedlings are abundant, but few saplings exist—suggesting that oak is not regenerating at Rocky Point. Mechanical removal of conifers would help maintain the Garry oak community over the near future, but given the nearly complete lack of oak recruitment, some restoration of ecosystem processes—most likely fire—will be required to maintain a functioning Garry oak ecosystem. This management strategy will be severely constrained by changes in stand structure resulting from decades of fire exclusion, the potential for weedy exotics to invade the post-fire communities, and the presence of an ammunition depot nearby.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".