Origins of clonal diversity in the hypervariable asexual ostracode <i>Cypridopsis vidua</i>
Bibliographic record
Abstract
Abstract Prior allozyme studies have indicated that populations of the asexual ostracode, Cypridopsis vidua (Müller), show extraordinary clonal diversity. Based on a joint examination of allozyme variation and sequence divergence at the mitochondrial cytochrome c oxidase I (COI) gene, the present analysis provides new insights concerning the origins of this variation. The results establish that populations of C. vidua in one recently deglaciated region of North America are not only allozymically diverse, but also include several divergent mitochondrial DNA (mtDNA) lineages. The extent of sequence divergence among these lineages is so large as to suggest their diversification over the past 7–8 million years. The patterning of genetic divergence among co-occurring clones makes it apparent that much of the mtDNA and allozyme diversity in local populations owes its origins to recurrent colonization events. However, in situ mutational diversification also appears to explain some variation. The mechanisms enabling the sustained coexistence of such a large array of closely allied genotypes remain unclear, but there is an apparent difference in equilibrium diversity between benthic and planktonic asexual organisms.
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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 | 0.001 | 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) | 0.009 | 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".