Canada frostweed (<i>Helianthemum canadense</i>(L.) Michx.; Cistaceae) at the northeastern limit of its range: implications for conservation
Bibliographic record
Abstract
Canada frostweed (Helianthemum canadense) is a perennial herb whose abundance and habitat are declining in Nova Scotia. These sites mark the northeastern limit of this species with nearest populations occurring in Maine and Quebec. To determine the genetic structure of northeastern populations, we used amplified fragment length polymorphisms to examine individuals from Nova Scotia, Maine, New Hampshire, and Quebec. Cluster analyses and analysis of molecular variance identified four groups: (i) Queens County, Nova Scotia; (ii) Kings County, Nova Scotia; (iii) Quebec; and (iv) Northeastern New England. New England samples revealed evidence of gene flow among populations within that region, and several individuals from Quebec and Queens County, Nova Scotia, were assigned to the same cluster. The majority of individuals from Kings County were assigned to a separate cluster from that associated with Queens County, indicating two distinct populations within Nova Scotia. Differences between Nova Scotia populations may be attributed to isolation and drift, or separate postglacial colonization events. We recommend that Queens County and Kings County populations be considered as discrete units for conservation and, because Nova Scotia populations are distinct from other populations in eastern Canada and northeastern United States, we suggest that conservation of populations at the northeastern limits of the range of H. canadense is warranted.
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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".