Evapotranspiration Dynamics During the Ecosystem Development of a Constructed Upland‐Fen Watershed
Bibliographic record
Abstract
ABSTRACT In recognition of the need for sustainable land use practices, environmental regulations require landscapes affected by resource extraction in the Athabasca Oilsands Region to be reclaimed to their pre‐disturbance functionality. Thus, pilot‐scale watersheds have been constructed to examine the viability of reclamation endeavours in the region. As water availability is a primary driver of ecosystem function, an understanding of water usage and movement during the different phases of ecosystem development is required to ensure successful reclamation. This study captured the evolving evapotranspiration (ET) regime during the initial 7 years post‐construction of a fen‐upland watershed. Both landscapes exhibited significant biophysical evolution, from bare ground to fully vegetated ecosystems. During bare ground conditions, ET was driven by atmospheric and edaphic controls. In the fen, ponded conditions resulted in consistently high rates of surface evaporation throughout the growing season (3.8 mm/day). In contrast to the drier upland, which exhibited limited evaporation rates (1.2 mm/day), punctuated by small increases in response to precipitation events. Once a plant community was well established, edaphic controls decreased, and ET fluxes were largely driven by plant‐mediated responses to atmospheric conditions. In the fen, widespread plant coverage and the establishment of a thick litter layer suppressed surface evaporative losses but increased transpiration, ultimately resulting in lower ET rates (2.5 mm/day). In the upland, the growth and development of treed species resulted in a marked increase in ET rates (2.6 mm/day). These rates are comparable to those of natural landscapes in the region, suggesting successful establishment of ecohydrological function.
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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".