Surface Peat Mass and Carbon Balance in a Hypermaritime Peatland
Bibliographic record
Abstract
Net primary production (NPP) and decomposition were measured in a suite of representative microsite types, and 210 Pb age was determined on near‐surface peat in a hypermaritime sloping peatland in British Columbia, Canada. Hummock and depression communities had significantly higher aboveground NPP, and were characterized by higher moss NPP than other communities. Mass loss of a standard litter material was significantly different among the microcommunities, possibly because of the differences in microsite oxic conditions and water movement. Incubated litter material lost C and gained N during the 2‐yr trial in all microcommunities, except for the Sphagnum austinii hummock, where N was lost at shallow depth. Low N content in the living Sphagnum and further N depletion in hummocks suggest that the hummock Sphagnum peat is recalcitrant to decomposition. Peat accumulation was found to be faster in hummock than in lawn communities. The hummock Sphagnum NPP and mass loss values were higher than published values for continental peatlands, possibly due to the wet and mild hypermaritime climate in this region. The recalcitrant nature of the litter and high NPP in hummocks likely account for rapid peat accumulation at the surface, whereas peat decomposition is most pronounced with depth, resulting in similar C sink strength as in hummocks in continental peatlands. Given that lawn community predominates, overall C sequestration capacity at the study site was estimated to be smaller than in continental peatlands. Possible range of C sink strength in sloping open peatlands in the hypermaritime region, therefore, is lower than or close to that in continental peatlands.
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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 | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 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) | 0.001 | 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".