植物プランクトン濃度の変化により 北極海の原産物が増加しています
K M Lewis1, G L van Dijken1, K R Arrigo2
1Department of Earth System Science, Stanford University, Stanford, CA 94305, USA.
Science (New York, N.Y.)
|July 11, 2020
まとめ
北極の植物プランクトンの原産は 海氷の減少により 57%増加しました 将来の増加は栄養素の流入と植物プランクトンバイオマスによって引き起こされ,より高いトロフィックレベルと炭素輸出を支える可能性があります.
科学分野:
- 海洋学
- 海洋生物学
- 気候科学
背景:
- 北極の海氷の減少は 歴史的に 植物プランクトンの 生産量増加と相関しています
- 北極の原産物に対する 継続的な海氷の減少の長期的な影響については 議論が続いています
- これらの変化を理解することは 北極の生態系の反応を予測するのに 極めて重要です
研究 の 目的:
- 20年にわたる北極原産物の変化を定量化する
- 海氷の減少に起因する原産物の変化の要因を特定する.
- 北極海が将来的に 高いトロフィックレベルと炭素輸出を支える能力を 予測する.
主な方法:
- 北極海に特化した海洋色アルゴリズムを使用した.
- 1998年から2018年までの衛星データを分析して,一次生産の動向を評価した.
- 海氷の広がり,植物プランクトン生物量,栄養素の利用可能性との関係を調査した.
主要な成果:
- 1998年から2018年の間に北極原産物の57%の増加を観測した.
- 初期の増加は海氷の減少による オープンウォーターの増加と関連していました
- 後の増加は主に植物プランクトンのバイオマスの増加によって引き起こされ,新しい栄養素の流入によって支えられました.
結論:
- 北極の原産物は海氷の動態や 栄養素の利用性に敏感です
- 北極海は将来的に 高いトロフィックレベルの生産と 炭素の輸出を支えるかもしれません
- 北極の海洋生態系の進化を理解するには 継続的な監視が不可欠です
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