Colonization, extinction, and phylogeographic patterning in a freshwater crustacean
Bibliographic record
Abstract
Phylogeographic analyses have revealed the importance of Pleistocene vicariance events in shaping the distribution of genetic diversity in freshwater fishes. However, few studies have examined the patterning of variation in freshwater organisms with differing dispersal syndromes and life histories. The present investigation addresses this gap, examining the phylogeography of Sida crystallina, a species whose production of diapausing eggs capable of passive dispersal was thought to constrain its regional genetic differentiation. By contrast, the present analysis has revealed deep allozyme and cytochrome oxidase I mitochondrial DNA divergence between populations from North America and Europe. Moreover, North American populations are separated into four allopatric assemblages, whose distribution suggests their derivation from different Pleistocene refugia. These lineages show higher haplotype diversity and deeper sequence divergence than those of any fish from temperate North America. Its distinctive life history traits have evidently sheltered lineages of Sida from extinction, contributing to a remarkably comprehensive and high resolution phylogeographic record.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.001 |
| 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".