変化する世界における河川生態系の代謝と炭素の生地化学

Tom J Battin¹, Ronny Lauerwald², Emily S Bernhardt³

¹River Ecosystems Laboratory, Alpine and Polar Environmental Research Centre (ALPOLE), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. tom.battin@epfl.ch.

Nature

|January 18, 2023

まとめ

川は世界の炭素循環の鍵となり炭素の吸収と温室効果ガスの排出に影響を与えます川の生態系の代謝を理解することは,これらの重要なプロセスに及ぼす地球規模の変化の影響を予測するのに不可欠です.

科学分野:

環境科学
生地化学
エコロジー

背景:

川のネットワークは陸と海と大気を繋ぐ重要な生地化学的ハブです
川の炭素循環の理解が限られているため気候変動の影響を予測することは困難です
地球規模での変化は,河川による炭素吸収と温室効果ガスの排出の空間的・時間的動態を変化させる可能性があります.

研究の目的:

川の生態系の代謝に関する研究を見直し,現在の見積もりをまとめる.
地球上の河川の有機と無機の炭素の流れを定量化するために
川の生態系の代謝と炭素の流れに及ぼす影響について議論する.

主な方法:

河川生態系の代謝の研究に関する文献レビューと合成.
土地から河川への有機と無機の炭素の流れの定量化
陸地から沿岸の海への炭素バランスの変化の分析

主要な成果:

河川の生態系の純生産と二酸化炭素の排出は有機と無機の炭素のバランスを変化させます
川の生態系の代謝と炭素の流れに及ぼす影響について議論されました.
グローバルな変化の予測を改善するための主要な研究方向が特定されました.

結論:

川のネットワークと世界の炭素予算におけるその役割を理解するには川の観測システムが不可欠です
川の流動に及ぼす世界的な変化の影響を正確に予測するには,生態系の代謝に関するさらなる研究が必要です.
川の炭素循環の理解を深めることは,世界の炭素予算の評価に不可欠です.

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