Distribution and community structure of chloropid flies (Diptera: Chloropidae) in Nearctic glacial and post‐glacial grasslands
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Abstract Arthropod species inhabiting disjunct xeric grasslands in the Yukon Territory, Canada may be relicts of Pleistocene steppe assemblages widespread in Beringia during glaciation, or they may be recent remnants of northward expansion of southern grassland communities during the early‐Holocene Hypsithermal. To assess the likely origin of the Yukon grassland arthropod community, grassland‐associated Chloropidae (Diptera) were compared from three regions: the Canadian Prairies, the Peace River region of Alberta and the southern Yukon. If Yukon grassland insect communities, like those in the Peace region, result primarily from northward dispersal during the Hypsithermal, chloropid assemblages in all regions would be similar, except that species richness would decline with increasing latitude. If, however, they are primarily relicts of Pleistocene steppe communities, Yukon chloropid assemblages would be distinct from southern assemblages. There was a latitudinal gradient of decreasing species richness and Yukon assemblages were distinct from Prairie and Peace region assemblages, based on cluster analysis, non‐metric multidimensional scaling and pairwise comparisons of Morisita similarity indices. Community‐level analyses suggest that Yukon assemblages have been separated from those in the Prairies and Peace regions since before the Hypsithermal and likely contain a mix of relict populations inhabiting Pleistocene steppe remnants in East Beringia with recent northward post‐glacial dispersal from the southern Prairies. Dispersal from eastern Russia via Beringia appears to have been negligible.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.001 | 0.001 |
| 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 it