Variation in Lichen Species Assemblages and Secondary Metabolites Surrounding<i>Stereocaulon</i>Species in the Boreal Forest of Northwestern Manitoba
Bibliographic record
Abstract
Lichen assemblages and their secondary metabolites may be influenced by the broader habitat. More specifically, the function of the thallus structure within a species may influence the production of some secondary metabolites. The objectives of this study were to examine thallus variation in secondary metabolites for one genus, Stereocaulon, and to compare the diversity of lichen assemblages and their secondary metabolite distributions in the boreal forest of northwestern Manitoba. Five sites in each of three study regions were selected (Sherridon, North Star, and Athapap), around the presence of a Stereocaulon thallus. All ground lichen species were collected from five quadrats within each site totaling 75 quadrats. Lichen species were identified and thin-layer chromatography was performed to identify secondary metabolites. A total of 59 ground lichen species and 20 secondary metabolites were identified. This study showed that norstictic acid and constictic acid were absent from the pseudopodetia but present in the apothecia and phyllocladia of Stereocaulon tomentosum only. It also showed that species richness was different between one region (Athapap) and the other two regions (North Star and Sherridon). North Star and Sherridon had the highest species richness and number of metabolites and Athapap had the lowest.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 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".