再湿潤化した泥炭地生態系の温室効果ガス収支

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:泥炭地再湿潤のGHG収支に関する定量的統合知見と、CH4トレードオフの長期モニタリング必要性を提供する。

🏢実務担当者:自然資本・土地利用プロジェクトの炭素クレジット創出や緩和策評価に活用できる。

🏛政策担当者:国別インベントリや炭素市場枠組みへの泥炭地再湿潤の組み込み根拠を提供する。

Peatlands store approximately 600 Pg of carbon in organic soils covering just three percent of the global land surface, yet drainage for agriculture and forestry has converted many peatlands from net carbon sinks to substantial greenhouse gas sources. Rewetting drained peatlands is increasingly recognized as a climate mitigation strategy, but the trade-off between reduced CO₂ emissions and enhanced CH₄ production complicates the net greenhouse gas balance. This meta-analysis synthesizes GHG flux measurements from 64 peer-reviewed studies encompassing rewetted peatlands across boreal, temperate, and tropical climate zones. Comparison of drained and rewetted temperate fens reveals that rewetting reduces net GHG emissions by 63 percent (from 19.9 to 7.4 t CO₂e ha⁻¹ yr⁻¹), with a 69 percent reduction in CO₂ emissions partially offset by a 650 percent increase in CH₄ emissions. Among restoration approaches, active management (assisted revegetation, controlled water-table manipulation) achieves the largest net GHG reductions across all climate zones, while paludiculture (productive use of wet peatlands) provides intermediate emission reductions alongside economic returns. Tropical peatlands show the greatest absolute reduction potential (42.6 to 51.2 t CO₂e ha⁻¹ yr⁻¹) owing to their exceptionally high drained-state emissions. These findings support the inclusion of peatland rewetting in national climate mitigation portfolios and carbon market frameworks, while highlighting the need for long-term monitoring to capture temporal dynamics of post-rewetting GHG trajectories.

• openalex https://doi.org/10.63090/ejers/3139.9207.0007first seen 2026-10-02 04:42:18