Food web structure, mercury biomagnification and carbon pathways in an experimentally flooded wetland
Bibliographic record
Abstract
The objective of this thesis was to determine the role of food web structures and carbon sources in contributing to elevated organic mercury (OHg) in a flooded reservoir food web compared to a non flooded lake. Stable isotopes of carbon indicated the different sources of food energy that could potentially transfer OHg through the food web to top predators. Stable isotopes of nitrogen related trophic position of organisms to contaminant loading and allowed quantification of biomagnification. The components of the pelagic food webs in the Experimental Lake had higher concentrations of OHg relative to other food webs based on littoral benthic algal production of the Experimental Lake and food webs in the Control Lake. Consequently, the higher OHg concentrations in the pelagic food web were caused by higher OHg concentrations at the base of the pelagic food web. Consequently, this study found that impoundment affects mercury burdens in pelagic food webs more so than littoral/benthic food webs. (Abstract shortened by UMI.)
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.001 | 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".