Stable oxic-anoxic transitional interface is beneficial to retard soil carbon loss in drained peatland
Bibliographic record
Abstract
Peatlands are vital carbon sink globally and have been drained severely. An oxic-anoxic transitional (OAO) interface was created in drained peatlands profile during long-term water table fluctuation. Here, we aimed to investigate how the CO 2 release at the OAO interface respond to climate warming and exogenous carbons addition. We found that the carbon at OAO interface was complex, with higher proportion of aromatics, aliphatics and Fe-bound organic carbons . The microbial activity and diversity at OAO interlayer were lowest. Through a lab incubation, we found that the cumulative CO 2 emission at OAO interface was 12.36 ± 1.57 mg CO 2 g −1 C, 117.6% and 36.6% lower than the upper oxic soil (26.89 ± 1.05 μg CO 2 g −1 C) and deep anoxic (16.88 ± 1.56 μg CO 2 g −1 C) layer, respectively. Moreover, the CO 2 emission at the OAO interface was least warming-responsive under anoxic dominated conditions. These results reveal that the OAO interface could work as a buffer to retard drained peatland carbon lose under warming climate. However, the CO 2 emission at the OAO interface was extremely sensitive to exogenous carbons, which increased by 53.9%–72.1% after exogenous carbon addition, implying that the buffer capacity of OAO interface will collapse if being exposed to available carbons from plant or soil macromolecular carbons. Our results demonstrated that maintain a stable OAO interface was beneficial to reduce drained peatlands carbon loss, and the priority is to ease the priming effect caused by exogenous carbons.
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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".