NEOICHNOLOGICAL EXPRESSIONS OF SALINITY VARIABILITY: TESTING ICHNOLOGICAL PROXIES IN THE GIRONDE ESTUARY AND ARCACHON BAY, FRANCE
Bibliographic record
Abstract
Abstract This study evaluates neoichnological characteristics of the Gironde Estuary and Arcachon Bay to test ichnological proxies of salinity conditions along a freshwater to marine gradient. Both the Gironde Estuary and Arcachon Bay are classified as mixed-influence (wave-tide) estuaries, but tidal currents are stronger and turbidity is higher in the Gironde Estuary funnel than in Arcachon Bay. Trace distributions and the size-diversity index (SDI) are determined at various localities in both systems and are then compared to trends established in prior studies. Results indicate that SDI provides a robust, quantitative correlation with salinity that is comparable to geochemical and biological proxies. Trace (ichno) diversity alone reflects salinity qualitatively but is limited by sampling and human (interpretation) biases and data variability. These findings contribute to better understanding the predictive value and limitations of SDI in modern estuaries. However, the application of SDI in the sedimentary record requires additional research as neither infaunal diversity nor vermiform burrows can be established reliably therein.
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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 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.000 | 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 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".