Fungal assemblages in moss & lichen mats of boreal Manitoba
Bibliographic record
Abstract
Fungal assemblages in mats of Cladonia mitis, C. rangferina, and Pleurozium schreberi in Manitoba were isolated and compared in July and September. Temporal changes in these fungal assemblages were seen over the two sampling periods. The fungal assemblages of C. mitis and C. rangiferina were significantly diffirent from those found in P. schreberi during both sampling periods. Isolation of fungi from C. mitis and C. rangiferina involved subsampling the lichens into upper and lower strata, which were also compared, revealing significant differences between the upper canopies and the lower bases of the lichen mats. Alternaria, Cladosporium, and Epicoccum) common epiphytes, were found to be associated with the upper canopies of C. mitis and C. rangiferina, while Mucor and Trichoderma, common soil fungi, were found associated with the bases of C. mitis and C. rangiferina. Soil litter sampling beneath mats of C. mitis and C. rangiferina revealed 11 fungal taxa found in the lichen mats that were not in the soil, 6 fungal taxa common to both lichen mats and soil litter beneath them, and 5 fungal taxa present only in the soil litter layers. Fungi isolated from C. amaurocraea, C. arbuscula, C. rangiferina, C. stellaris, C. uncialis, Evernia mesomorpha, Vulpicida pinastri, Stereocaulon alpinum, and Peltigera spp., revealed significant differences in fungal assemblages across the various lichens. Microhabitat determines fungal assemblages present on lichens. The most important factor of microhabitat seen was moisture. Amplification of a portion of nuclear small subunit ribosomal DNA (SSU rDNA) from the fungal partner of C. arbuscula revealed fragments of two different size classes in one region. One size class was suspended to contain an intron, while the other had no intron. Amplification of a separate region of SSU rDNA from the fungal partner of C. arbuscula revealed fingerprint banding patterns. Variation in banding patterns, as well as the presence or absence of the intron, was examined among samples both within and among 10 transects laid out on islands and lake shores over a 2 km area. Cluster analysis revealed no difference in variation within and among transects, indicating efficient gene flow over the area.
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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 | 0.002 | 0.001 |
| 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".