ダイアトームの移動による海上窒素の上向き輸送

Tracy A Villareal¹, Cynthia Pilskaln², Mark Brzezinski³

¹Marine Science Institute, The University of Texas at Austin, 750 Channel View Drive, Port Aransas, Texas 78373, USA.

Nature

|April 19, 2018

まとめ

巨大な植物プランクトンは垂直に移動し重要な栄養素を運びます以前は過小評価されていたこの藻類は地表への窒素輸送を大きく促進し海洋生態系に影響を与えます

科学分野:

海洋生物学
海洋学
植物プランクトン生態学

背景:

垂直に移動する大きな植物プランクトンを宿している.
この移動は窒素を輸送し,新しい生産に貢献します.
これらの細胞の希少性と不可視性のために,この貢献を定量化することは困難です.

研究の目的:

北太平洋の窒素輸送に Rhizosolenia diatom mats の貢献を定量化する.
新しい窒素の源としてこれらのマットの重要性を評価する.

主な方法:

リゾゾソレニアマットを研究するために,遠隔ビデオ観測を用いた.
観測は中央北太平洋の上部150mをカバーしました.
植物プランクトン媒介の窒素輸送を計算した.

主要な成果:

リゾゾソレニアマットは,植物プランクトン媒介の窒素輸送を8倍まで大幅に増加させる.
クルーズ平均は18~97μmol Nm−2d−1のマット輸送を示している.
個々の駅では,輸送量は171μmolNm−2d−1に達し,輸出生産量の59%を占めています.

結論:

リゾゾソレニアマットは海洋表面への新しい窒素の極めて重要な供給源です
この上向きの栄養分輸送は地域の元素の循環に大きく影響します
大きな植物プランクトンの垂直移動は海洋の生産性において重要な役割を果たします

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