メソスケールの垂直運動と海洋における植物プランクトンのサイズ構造

J Rodríguez¹, J Tintoré, J T Allen

¹Departamento de Ecología, Universidad de Málaga, Campus de Teatinos, 29071-Málaga, Spain. jaime@uma.es

Nature

|March 27, 2001

まとめ

植物プランクトンの大きさ構造は,海洋の炭素循環に影響を与えます. メソスケールの垂直運動は,窒素の利用度だけでなく,植物プランクトンのサイズを直接制御し,エネルギーフロー経路に影響を与えます.

科学分野:

海洋学海洋学とは
海洋生態学海洋生態学
バイオジオケミストリーバイオジオケミストリー

背景:

植物プランクトンのサイズ構造は,炭素循環経路 (微生物 vs 草食動物) を決定し,海洋食物網のエネルギー流れに決定的に重要です.
伝統的に,植物プランクトンの大きさは窒素の利用可能性 (再生されたもの vs. 新しい生産) と関連しており,炭素の輸出に影響を与えています.
しかし,水力学的力は,植物プランクトンのサイズ構造を制御する上でより直接的な役割を果たす可能性があります.

研究の目的:

メソスケールの垂直運動と植物プランクトンのサイズ構造の間の直接的な関係を調査するために.
垂直運動をフィトプランクトンのサイズ-多量スペクトルと結びつける経験的モデルを開発する.

主な方法:

フロントの生態系における植物プランクトンの大きさ-豊富さのスペクトルの分析.
メソスケールの垂直運動とスペクトルの傾きを相関させる実証モデルの開発.

主要な成果:

この研究では,垂直運動と植物プランクトンの大きさとの直接的な関連性を示す経験的モデルを提示しています.
上昇速度の増加は,より大きな植物プランクトン細胞の割合が高いことと相関しています.
メソスケールの垂直運動は,海面と渦に多く見られ,植物プランクトンのサイズ分布に直接影響を及ぼします.

結論:

メソスケールの垂直運動は,海洋生態系における植物プランクトンのサイズ構造の主な要因である.
この発見は,海洋における炭素の輸出とエネルギー移転の理解において,栄養ダイナミクスから水力ダイナミクスへと焦点を移している.

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