Selection of algal genotypes by three species of lichen fungi in the genus<i>Cladonia</i>
Bibliographic record
Abstract
The lichen-forming fungal genus Cladonia P. Browne associates with green algae in the genus Trebouxia de Puymaly. Genetic structure of the algal symbionts in Cladonia gracilis (L.) Willd., Cladonia multiformis G. Merr., and C. rangiferina (L.) Nyl. was used to infer geographic patterns and symbiont associations. Algal genotypes were defined by restriction fragment length polymorphisms in the nuclear internal transcribed spacer rDNA from 115 samples of Cladonia collected from two geographic regions in Manitoba, Canada. Results suggested that two species of fungal symbiont were highly selective of the algal partner within given geographic areas, and one species was highly selective of the algal partner regardless of the geographic region. Different degrees of selectivity in three species suggested that even within the same genus, fungal selection for the algal partner may vary. In addition, DNA sequences from a subsample of 20 algal and 11 fungal specimens were used to determine phylogenetic relationships of each symbiont. Sequences of four group I intron-like insertions in the small subunit rDNA, two of which were newly reported for the genus Cladonia, were used to infer the fungal phylogeny. The intron phylogenies produced monophyletic species. Sequences of the internal transcribed spacer rDNA were used to infer the algal phylogeny. Cladonia gracilis and C. rangiferina were associated with three species of Trebouxia.Key words: selectivity, Cladonia, Trebouxia, phylogeny, geographic pattern.
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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 | 0.001 | 0.000 |
| 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) | 0.000 | 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 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".