Tectonic drivers of the scaling dinosaurian fossil record
Bibliographic record
Abstract
The fossil record is the only direct source of information of the evolution, ecology, and biogeography of non-avian dinosaurs. The taphonomy is the science of the study of transition of biological information in to the stratigraphical record. The stratigraphical record is characterized by multiscale spatial and temporal structure. The largest scale structures are often called “megabiases”. Here we study the structure of megabiases of the dinosaurian fossil record from the Paleobiology Database in time as well as in space. We found a strong tendency of dinosaur occurrences to cluster at tectonic plate boundaries. Moreover, there are systemic temporal differences in the degree of this outward distribution of occurrences which are related to the sea level and the degree of tectonic fragmentation. Finally, we used spatial distributional patterns in simulating occurrences, and determined the effects of such inhomogeneities on the accuracy of determination of bioprovinces using newly developed R package ‘HespDiv’ for contiguous spatial cluster analysis.The study was supported by the grant by S-MIP-21-9 “The role of spatial structuring in major transitions in macroevolution”.
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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 | 0.001 | 0.003 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.003 | 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".