Effects of subalpine and alpine soil from Vancouver Island, British Columbia, on the germination and growth of Pacific silver fir, mountain hemlock, and yellow cedar in a greenhouse
Bibliographic record
Abstract
Montane treelines worldwide often shift upwards in response to climate change, leading to a decrease in montane meadow extent. I performed a greenhouse study using soils from two treelines on Vancouver Island to grow seedlings of Pacific silver fir, mountain hemlock, and yellow cedar to determine the influence of soil origin on treeline dynamics. Mountain hemlock seedlings grown in Forest (subalpine forest) soils had longer roots than those grown in Alpine (alpine) soils; however, they had lower percent germination in soils from Mt. Washington, British Columbia. There were no intraspecies differences for seedling shoot length or biomass, or root biomass between Forest and Alpine soils. Mountain hemlock seedlings had greater shoot and root lengths and biomass than Pacific silver fir. Forest soils had marginally greater proportions of coarse sand or gravel, and more organic matter than Alpine soils. There were no differences for nutrients. Overall, results suggest that soils can influence seedling establishment and growth at the treeline.
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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 | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.000 |
| Scholarly communication | 0.001 | 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".