Promontory induced tidal mixing in a narrow channel : effects on nutrient concentrations, primary productivity and zooplankton standing stock
Bibliographic record
Abstract
Horizontal mapping, aerial photography, and current meter deployment have been used to identify a tidally induced mixing event about a promontory in the Strait of Georgia, British Columbia, Canada. Mixing plumes were observed to commence, downstream of Shingle Spit during ebb tides when the mean velocity for the water column reached a minimum of 12.7 cm.s⁻¹. Mixing plumes on ebb tides, were characterized by increased surface salinities as well as increased nitrate + nitrite and phosphate concentrations. Increases in concentrations of nitrate + nitrite of 2.6 μg at .1⁻¹ and phosphate of 0.45 μg at.1⁻¹ were observed in the euphotic zone associated with the mixing plumes. Nutrient additions were correlated to an increase in primary production of 13.8 mg C.m⁻³ in the mixed water as determined by the uptake of ¹⁴CO₃²⁻. Estimates of total volume of upwelling during the stratified months of June and July 1986 were performed allowing an estimation of the net flux of new nutrients into the euphotic zone during this period. The total increase in primary production due to mixing occurring downstream of Shingle Spit was determined experimentally to range between 910 and 2.2x10⁴ kg of "new production" compared to the Redfield stoichiometric estimate of from 1.4x10³ to 3.0x10⁴ kg of "new production" during June and July, 1986. Measurements of net flow in Lambert Channel allowed determination of the destination of the increases in primary production. It is suggested that utilization of increases in primary production caused increases in the zooplankton standing stock in the region south of Lambert Channel and Hornby Island. Gut contents of adult Qncorhynchus kisutch caught in the region contained zooplankton groups which were components of the increase of zooplankton standing stock. The presence of these zooplankton groups in the gut contents suggests utilization of the increases in zooplankton standing stock by predators further up the food chain.
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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 | 0.000 | 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 | 0.002 | 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".