The Effect of Disturbances on the Belowground System \nin the Black Spruce Boreal Forest: \nEctomycorrhizal Community, Nutrient Availability and Decomposition Rates
Bibliographic record
Abstract
Disturbances are integral to the structure and functioning of the boreal forest. However their effects upon the underground components in this ecosystem are still largely unknown. In this thesis, I describe the ectomycorrhizal and understory plant communities in the black spruce boreal forest of the Abitibi region, Québec, and discuss the effects that both forest fires and logging have on the ectomycorrhizal community, nutrient supply rates and decomposition rates. The ectomycorrhizal community from black spruce, characterized by morphotyping and molecular techniques was dominated by Cenococcum geophilum and three Piloderma species. The plant community was made up of a mosaic of vegetation patches, which are described in this thesis, as either Sphagnum dominated plots, which associated with Sphagnum, Gaultheria hispidula and Picea mariana; or ericoid/lichen dominated plots, which associated with Lichen and Vaccinium angustifolium. Statistical analysis revealed that the effect of the disturbances was largely insignificant to the ectomycorrhizal community, nutrient supply and decomposition rates, and most differences were between transects. However, both the understory plant community plot types and abundance of individual plant species were found to have significant correlations with the most abundant ectomycorrhizal species. This suggests that if we want to know how the ectomycorrhizal community will be affected by disturbances, we should look at changes in the plant community due to disturbances.
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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 | 0.006 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.004 | 0.002 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.003 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| 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".