Nitrogen and phosphorous budgets in a lacustrine sand dune ecosystem
Bibliographic record
Abstract
Atmospheric nitrogen input of about 1.622 g m-2 year-1 is a major source of nitrogen for plants in the foredunes of Lake Huron at Pinery Provincial Park. The concentration of total nitrogen and nitrate nitrogen in the soil increased from the beach to the first and the second dune ridges. The south slopes of dune ridges contained greater available soil nitrogen. Phosphorous from atmospheric deposition (0.016 g m-2 year-1) was too low to meet the demands of grasses on both the first and second dune ridges. The source of phosphorous in sand dunes was primarily from the weathering of parent material in the soil pool. The total phosphorous pool in the soil did not change from the first to the second dune ridge primarily because of sand movement, erosion, and sand accretion. No relationship was found between decay rates and age of sand dune ridges. After eight months of decay the loss of above- and below-ground biomass ranged from 27 to 39% in five habitats. The length of time for complete decomposition of above- and below-ground biomass ranged between 495 to 855 days. Nitrogen leaching loss was higher from the soil on the second dune ridge, while phosphorous leaching loss was higher on the first dune ridge. Proportionately less nitrogen was lost in leaching than phosphorous. Even though nitrogen and phosphorous were present in low quantities, the plant species did not show any symptoms of deficiency.
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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 | 0.000 | 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 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".