Benthic invertebrate community recovery in a remediated stream
Bibliographic record
Abstract
A foundational failure of the perimeter embankment of the Mount Polley Mine Tailings Storage Facility (TSF) on August 4th 2014 resulted in a breach that released approximately 25 million cubic meters of debris (water and solids that consisted of tailings, construction materials, and scoured sediment and soil). The debris flowed along the entire length of Hazeltine Creek, scouring native materials and depositing TSF material in the creek channel. A first phase of channel remediation in Hazeltine Creek was completed in 2015, and a second phase which incorporated natural geomorphological and fish habitat values was completed in 2016 and 2017. Benthic invertebrate community monitoring was completed most recently in these remediated areas in 2017 and 2018. This monitoring documented rapid recolonization on the basis of organism densities that were similar to pre-breach in some areas, including colonization by sensitive EPT taxa. A number of differences relative to pre-breach remained, indicating that the community was still recovering from physical disturbances associated with the remediation work (including the influences of ongoing work on downstream areas). These included lower organism density in some areas, lower taxon richness, and a community that was dominated by early successional or tolerant taxon groups.
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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 | 0.001 |
| 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 | 0.000 |
| Scholarly communication | 0.001 | 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".