Freshwater phylogeography, the impact of life history traits on the post-glacial dispersal of zooplankton in North America
Bibliographic record
Abstract
This study used molecular markers to examine patterns of genetic variation and post-glacial dispersal in three species of freshwater zooplankton from glaciated North America. A survey of both mitochondrial and allozyme variation in the cladoceran ' Sida crystallina' revealed the presence of four allopatric assemblages derived from separate Wisconsinan refugia. Divergence between phylogroups was deeper than that previously observed for refugial lineages of freshwater fishes subject to the same glaciation events. Examination of mtDNA variation at two genes in the arctic anostracans ' Branchinecta paludosa' and 'Arlemiopsis stefanssoni' revealed a divergent phylogeographic history. 'A. stefanssoni' populations derive from a single glacial refuge, while 'B. paludosa ' occupied several refugia. The distribution of these phylogroups supports the presence of high arctic refugial lineages of both species in the Canadian arctic. Results from this study highlight the importance of life history characteristics including body size, diapause, and generation time in determining the ability of different taxa to persist in glacial refugia during the Pleistocene.
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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 | 0.000 | 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) | 0.001 | 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".