Exploring the intersection of coastal blue carbon and ocean acidification: A synthesis of biogeochemical processes, coastal management strategies, knowledge gaps, and future research opportunities
Bibliographic record
Abstract
Blue carbon ecosystems (BCE) provide carbon storage and sequestration services that deliver global and local outcomes for carbon cycling spanning geologic time. Ocean acidification (OA) is the process of decreasing pH in the ocean that results from the adsorption of anthropogenic carbon dioxide (CO2) from the atmosphere. The recent focus on quantifying and understanding the mechanisms whereby BCEs capture or release atmospheric CO2 has spurred interest in also understanding how these systems, both naturally and via management, may contribute to OA mitigation. This report explores the intersection of coastal blue carbon and ocean acidification (i.e., OA-BC nexus). We conducted a joint DFO-NOAA technical meeting to synthesize knowledge of the biogeochemical processes and coastal management strategies that impact the OA-BC nexus, and discuss knowledge gaps, including potential effects of climate change on the nexus, and outline future research opportunities. We focused on BCEs that Canada and USA have in common (i.e., tidal marshes, macroalgal forests, and seagrass beds) and outlined the production, consumption, and exchange of carbon and alkalinity between BCEs and their adjacent estuarine and coastal aquatic ecosystems. An expert assessment of the contribution of BCE management strategies (i.e., conservation, restoration, creation, and enhancement) to enhance OA mitigation locally revealed variable results and knowledge gaps. We concluded that conservation of focal BCEs was the most likely management strategy to positively mitigate local coastal acidification. Numerous natural and human activities affect BCE structure, function, and areal extent, but our predictive understanding of how such changes might affect coastal acidification is rudimentary. More detailed thought experiments are needed to identify ways to collaborate further across the OA-BC nexus. While it may not be possible to merge blue carbon and ocean acidification science entirely, this report provides a starting point to continue working together.
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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 | 0.008 | 0.008 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.006 | 0.007 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.006 | 0.010 |
| Open science | 0.001 | 0.003 |
| Research integrity | 0.002 | 0.004 |
| Insufficient payload (model declined to judge) | 0.003 | 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".