Boreal Mixed‐Wood Watershed Riparian Zone Cation Cycling during Two Contrasting Climatic Years
Bibliographic record
Abstract
Riparian zones are key transfer points for water, alkalinity, and base cations from terrestrial to aquatic ecosystems. Base cation cycling in, and fluxes from, forested and alder swamp riparian zones were investigated for one climatically “normal” and one dry season. The soil extractable base cation pools and pH were higher in the alder riparian type. Combined measurements of litter, forest floor, mineral soil, and soil solution indicate that base cation uptake in both riparian zones occurs from the mineral soil. It is not known, however, whether uptake is from the upper (<20 cm) or deeper (>20 cm) mineral soil. Litter N, P, Ca, and Mg concentrations indicate that the forested riparian zone is more sensitive to base cation depletion than the alder riparian zone. Soil solution base cation concentrations in the forested riparian zone were attributed to Si mineral weathering and organic matter mineralization. In contrast, carbonate, probably calcite, weathering was more common in the alder riparian zone. Base cation stoichiometry was similar between years and riparian types, but the proportion of anions shifted to dominance by SO 4 2− and organic acids during fall of the drier year, which resulted in higher fluxes of those anions. The anion shifts, however, were not reflected in base cation fluxes. Uncertainties in shifts in litter quality, mineralization, and hydrologic flux in response to temperature and moisture change require further documentation to adequately deduce the role of such changes, along with rainfall amounts, on base cation cycling in riparian zones.
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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) | 0.000 | 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 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".