The relationships between the ecological site quality and the site index and stem form of red alder in southwestern B.C.
Bibliographic record
Abstract
Site, soil, tree form, vegetation and foliar data were collected from thirty-seven natural stands of red alder (Alnus rubra Bong.) from three biogeo climatic subzones on Vancouver Island and the adjacent mainland of British Columbia. Based on temperature and precipitation normals, three subzones of the Coastal Western Hemlock zone are suggested as being the most suitable for the growth of red alder. The results of quantitative analyses between different site variables indicate that a major factor accounting for the majority of variance in the data is soil reaction. When the stands were divided into two groups based on pH, the majority of variation in site index was explained for both soil and foliar nutrient variables. Other variables had weak correlations with site index. Soil morphological and physical data were not sufficient to predict site index, and the use of soil moisture and nutrient regimes as categorical variables in site index regressions gave insignificant results. Diagnostic criteria applied to the understory vegetation of the stands could not differentiate site classes nor were stands differentiated on the basis of soil reaction group which seemed to dominate the separation of both soil and foliar variables. This is due to red alder's N-fixing ability, which tends to promote species having nutrient rich indicative value regardless of site. Tentative vegetation associations are proposed but the irrecognition needs further testing. The relationship between four measures of tree form of red alder with other variable domains did not indicate meaningful results. The hypothesis that form of alder differs with site cannot be accepted based on these data. The synthesis of a qualitative site assessment for estimating the potential productivity of red alder was approached from the recognition of soil parent materials while incorporating soil physical and morphological properties already in use infield guides.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 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".