Effect of Soil Water Content on Carbon Dioxide Flux at a Sparse-Canopy Forest in the Canadian Boreal Ecosystem
Bibliographic record
Abstract
The relationship between soil moisture and ecosystem-level carbon budget was investigated for a BERMS (Boreal Ecosystem Research and Monitoring Sites) site in Saskatchewan, Canada, using eddy covariance flux measurements obtained during 2001 and 2002. The site was located in a young jack pine stand (Pinus banksiana Lamb.) characterized by a sparse low canopy. The site was harvested in 1994 and young trees from ages one year to ten years were regenerating naturally. Total ecosystem respiration (Rec) at the site was sensitive to volumetric soil water content (VWC), and increased exponentially with VWC and soil temperature in warm seasons. Under daytime light-saturated conditions, gross primary production (GPP) had a positive linear correlation with VWC, with enhancement occurring under high soil temperatures. In contrast to GPP and Rec individually, net ecosystem CO2 exchange (NEE) was less sensitive to VWC. Under VWC > 0.03, the VWC-dependence was hardly detectable for NEE, irrespective of temperature range.
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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 | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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".