アメリカ合衆国とハワイの泥炭地帯の面積と状態を地図化することで,泥炭地帯の保護と回復を図る
Erik A Lilleskov1, Kevin J McCullough2, Dominic M Uhelski3
1USDA Forest Service, Northern Research Station, 410 MacInnes Dr., Houghton, MI, 49931, USA.
Journal of environmental management
|August 29, 2025
まとめ
炭素貯蔵と水文学にとって不可欠な 退廃した泥炭地帯を修復することで 温室効果ガスの排出量を大幅に削減できます 農業用泥炭地帯の再灌が排出削減の最大の可能性をもたらし,その次は溝の影響を受けた非農業用泥炭地帯です.
科学分野:
- 環境科学
- エコロジー
- 地理空間分析
背景:
- トートランドは炭素の吸収,水文学的規制に不可欠であり,分解すると温室効果ガス (GHG) を排出します.
- 気候変動の緩和と生態系の健全性にとって,地球規模の泥炭地帯の保全と回復は不可欠です.
研究 の 目的:
- アメリカとハワイの合流地域における泥炭地状態の地図を作成し,潜在的な回復目標を特定する.
- 泥炭地での温室効果ガスの削減の可能性を評価する.
主な方法:
- USDA gSSURGOのヒストソールとヒスティック・エピペドン (HE) のデータを土地利用,インフラ (溝,道路,鉄道),保護状況,湿地の使用状況と交差させるためにGISを使用しました.
- 農業利用の泥炭地とインフラによる影響の範囲を分析した.
- IPCCのレベル1の排出因子を適用して,潜在的CO2対価 (CO2-e) 排出量の削減を推定する.
主要な成果:
- 分析されたヒストソール/HEの7%が農業用で,19%の非農業用泥炭地が溝や道路,鉄道から150m以内にある.
- マッピングされたヒストソールの38%は法的に保護されており,635km2はNRCSの湿地である.
- 農業用泥炭地帯の再生は,面積単位あたりのCO2e排出量の最大削減をもたらし,廃棄された非農業用泥炭地帯の再生は費用対効果が高い.
結論:
- 特に農業用地では 温室効果ガス排出量の削減に 大きな機会があります
- 開発された泥炭地状態マップは,様々なスケールでの修復場所の特定と優先順位付けに役立つツールです.
- 現在分析されている乾燥した泥沼からの排出量の削減の可能性は,1年あたり36.8TgのCO2を上回る.
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