Bibliographic record
Abstract
Conversion of coastal marshes to inland open water is often associated with plant stresses such as saltwater intrusion into non-saline marshes and soil waterlogging, but the physical processes that initiate pond formation are not clear. We hypothesized that marsh elevation decreased rapidly following plant mortality because of structural collapse of the living root network. We monitored the elevation of 20 marsh hummocks between April 1990 and April 1992. Near total plant mortality occurred within 1 year and was attributed to excessive flooding. Hummock elevation decreased almost 15 cm within 2 years but elevation of adjacent ponds showed no trend. Plant stubble was still rooted in place on the submerged hummocks, and even slight evidence of surface erosion was not noted until the end of the study. The 137 Cs inventory in soil collected before and after the study also indicated that peat collapse rather than erosion caused the elevation decrease. Thus, peat collapse may initiate interior marsh ponds that subsequently spread via erosion and may partly explain why some marshes experiencing plant mortality convert to open water rather than re-vegetate. Peat collapse appeared to be the primary mechanism of marsh loss in this Louisiana hotspot.
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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 | 0.002 | 0.002 |
| Meta-epidemiology (narrow) | 0.003 | 0.001 |
| Meta-epidemiology (broad) | 0.002 | 0.002 |
| Bibliometrics | 0.003 | 0.002 |
| Science and technology studies | 0.003 | 0.002 |
| Scholarly communication | 0.004 | 0.007 |
| Open science | 0.003 | 0.004 |
| Research integrity | 0.008 | 0.003 |
| Insufficient payload (model declined to judge) | 0.990 | 0.990 |
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; the direct Gemma label and the distilled Codex classifier agree on what is shown here.
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".