Conservation assessment of a range-edge population of <i>Trichophorum planifolium</i> (Cyperaceae) reveals range-wide inbreeding and locally divergent environmental conditions
Bibliographic record
Abstract
Peripheral populations hold special conservation significance as repositories of genetic diversity, while they may also be at increased risk of extirpation. We collected genetic, ecological, and distributional data to evaluate an endangered range-edge population of Trichophorum planifolium (Sprengel) Palla. Our data show that, range-wide, T. planifolium has remarkably low within-population diversity, and most populations are dominated by a small number of unique genotypes. However, the extremely low observed and expected heterozygosity we document is comparable to results from other woodland sedges. The life history of this species results in high levels of inbreeding. The low diversity of the single remaining Canadian population is therefore not unusual for this species and does not support suggestions that this population suffers from elevated inbreeding depression. However, it is geographically isolated, and its soil environment is unusual for the species. These conditions may have facilitated local adaptation of conservation value for the long-term persistence of this species. In addition, we identified populations within the core range of this species that are comparably isolated to the peripheral population or that demonstrate greater genetic divergence. Consequently, while distinctions between core and peripheral populations are important for conservation management, understanding variation across the range of a species is key to effective protection.
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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 | 0.001 | 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) | 0.001 | 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".