成長した森林のCO2反応を制限する
Mingkai Jiang1,2, Kristine Y Crous3, Yolima Carrillo2
1College of Life Sciences, Zhejiang University, Hangzhou, China.
Nature
|June 5, 2024
まとめ
森林における二酸化炭素 (CO2) 濃度の上昇は,リン (P) が不足している場合,森林における炭素収縮を促進しない可能性があります. 微生物によるP捕獲は木のP吸収を制限し,森林の成長と炭素貯蔵の可能性を妨げます.
科学分野:
- エコロジー
- 生地化学
- 気候変動科学
背景:
- 陸上の生態系における炭素の吸収は,土壌の栄養素,特にリン (P) の供給によって影響を受けます.
- P制限土壌の成熟した森林は,二酸化炭素 (CO2) の増加下でバイオマス蓄積能力が低下しています.
- 生態系のPサイクルとCO2への反応の不確実性は,土地の炭素吸収の正確な予測を妨げています.
研究 の 目的:
- 森林における二酸化炭素の蓄積を制限するリン循環の役割を調査する.
- 高濃度のCO2にさらされるP限定の成熟した森林のための最初の包括的なP予算を構成する.
- 樹木の成長と炭素吸収に影響を与えるメカニズムを解明する.
主な方法:
- P制限の成熟森林のための包括的なリンゴ予算の作成.
- 高濃度のCO2下でのPサイクルとプラントのP吸収の分析
- 微生物のP捕獲と樹木のP利用可能性への影響の評価
主要な成果:
- 土壌の微生物はPの大部分を吸収し,再利用や植物の吸収を制限する.
- 樹木による効率的なP使用にもかかわらず,微生物によるP予防は,上昇したCO2下でのP吸収と同化を制限する.
- この微生物のP制限により 樹木が追加の炭素を吸収する能力が低下します
結論:
- 微生物によるP捕獲によって制限されるの利用可能性は,P制限された森林における木の成長に対するCO2肥料効果を制限する重要な要因である.
- 微生物のPサイクルと吸収を高めるための植物戦略は,森林の炭素捕獲を増やすために不可欠です.
- これらのPダイナミクスを理解することは,地球のシステムモデルを精錬し,将来の地球上の炭素貯蔵を予測するために不可欠です.
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