アマゾン川の二酸化炭素排出は,湿地によって引き起こされる
Gwenaël Abril1, Jean-Michel Martinez2, L Felipe Artigas3
11] Laboratoire Environnements et Paléoenvironnements Océaniques et Continentaux (EPOC), CNRS, Université Bordeaux 1, Avenue des Facultés, 33405 Talence, France [2] Laboratoire Géosciences et Environnement de Toulouse, Institut de Recherche pour le Développement, Université Paul Sabatier, 14 avenue Edouard Belin, 31400 Toulouse, France.
Nature
|December 17, 2013
まとめ
湿地は,大量の二酸化炭素 (CO2) を川に排出することで,地球規模の炭素循環に大きく貢献しています. これらの生産的な生態系は,しばしば見過ごされ,内陸水の炭素予算において重要な役割を果たします.
科学分野:
- 環境科学 環境科学
- エコロジー エコロジー エコロジー
- バイオジオケミストリー バイオジオケミストリー
背景:
- 内陸水は二酸化炭素 (CO2) 排出量の重要な源であり,陸上の炭素吸収を相殺する可能性があります.
- 現在のモデルでは,水中の炭素予算における一時的な湿地の役割がしばしば見過ごされている.
- 植生のある洪水地帯が炭素輸出に与える貢献は,依然としてほとんど定量化されていない.
研究 の 目的:
- 河川システムへの炭素輸出におけるアマゾンの湿地の役割を調査する.
- 湿地から輸出される二酸化炭素と有機炭素の量を定量化するために.
- 湿地の炭素輸出が内陸水の全体的な炭素予算に与える影響を評価する.
主な方法:
- アマゾン川の中央部とその洪水平原でのフィールド測定.
- 浸水した森林や浮遊植物の炭素輸出の分析.
- 総原産物生産と炭素輸出率の推定.
主要な成果:
- アマゾンの湿地は,大量に溶けたCO2と有機炭素を河川に排出する.
- 湿地は,その原産総生産の約半分を輸出しており,高地生態系よりもはるかに多い.
- この輸出は,中央アマゾン川とその流域からの二酸化炭素排出量の大きな部分を占める可能性があります.
結論:
- 暫定的または植生された洪水地帯は,世界の炭素予算の重要な構成要素です.
- これらの生態系は,高水準の原産物生産と,かなりの炭素輸出を組み合わせ,内陸水域からのCO2逃逸に影響を与えています.
- 将来の炭素予算の評価には,湿地の貢献が明示的に含まれなければならない.
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