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森林の土壌と床の呼吸は,混合葉の森で既に温度上昇に慣れている.
Liliana Scapucci1, Luana Krebs1, Susanne Burri1
1Department of Environmental Systems Sciences, ETH Zürich, Zurich, Switzerland.
Ecological processes
|September 3, 2025
PubMed で要約を見る
まとめ
森林の土壌の呼吸と二酸化炭素の交換は 18年間で温暖化に適応しました これは 気候変動にもかかわらず 森林が炭素を吸収する可能性を 維持していることを示しています
科学分野:
- 森林の生態学
- 気候変動科学
- 生地化学のサイクル
背景:
- 森林の生態系は,人間による二酸化炭素 (CO2) の排出を軽減する上で重要な役割を果たしています.
- 森林の土壌や床からの呼吸による損失は 森林の炭素収縮の可能性を相殺します
- 地球の気温上昇は土壌呼吸率 (SR) を増加させ,森林の緩和能力を低下させる可能性があります.
研究 の 目的:
- 混合葉の森で18年間の土壌呼吸 (SR) と森林床の純CO2交換 (NEE_ff) を定量化する.
- 先進的な統計モデルを使用して,SRとNEE_ffに影響を与える主要な環境要因を特定する.
- 変化する気候条件に対するSRとNEE_ffの長期的な温度感受性と適応を評価する.
主な方法:
- マニュアルとオートマチックな室を活用し,包括的なCO2流量測定を行うため,屋根の下の渦巻きコヴァリアンスシステムを使用しました.
- ドライバ分析のために,極端なグラディエントブースティングモデルとシャップリー添加式説明 (SHAP) を採用した.
- スイスの複合葉林で18年間の研究期間 (2006年−2023年) にわたる13年間のデータを分析した.
主要な成果:
- SRとNEE_ffの両方の主な要因は土壌温度上昇であり,その変動の50%以上を説明しています.
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