融解中の北極海氷からの藻類バイオマスの輸出
Antje Boetius1, Sebastian Albrecht, Karel Bakker
1Alfred Wegener Institute, Helmholtz Center for Polar and Marine Research, 27515 Bremerhaven, Germany. antje.boetius@awi.de
まとめ
北極では,氷の藻類のバイオマスは,記録的な夏の海氷の最小値の間,深海の床に沈みました. この発見は,北極の生態系に及ぼす気候変動の影響を評価するのに役立ちます.
科学分野:
- 海洋学 海洋学とは
- マリン・バイオロジー マリン・バイオロジー
- 気候科学 気候科学
背景:
- 北極の氷の下での一次生産は,季節性,氷の覆い,水柱の層分化によって制限され,栄養素の利用可能性が制限されています.
- 北極の海氷の広がりは,2012年夏に記録的な最小値に達し,これは氷の下の藻類の成長にとって重要な時期でした.
研究 の 目的:
- 記録的な海氷の最小値の期間中,北極中央の盆地における深海底に氷藻バイオマスの堆積を調査する.
- 気候変動が北極の生産性,生物多様性,生態学的機能に及ぼす影響を評価するためのデータを提供すること.
主な方法:
- 研究船"ポラースターン"は2012年夏に北極の東中部盆地 (82°89°北,30°130°東) を巡航した.
- 氷の藻類の生物質が深海底に堆積する測定値が収集されました.
主要な成果:
- 北極中央の盆地全体で氷藻バイオマスの広範な堆積が観察されました.
- 平均堆積率は,平方メートルあたり9グラムの炭素で測定されました.
結論:
- この研究は,北極中央部の深海への主要な生産物の輸出を顕著に示しています.
- 発見は,気候変動による北極海氷の減少による生態学的影響を理解するために重要なデータを提供します.
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