プランクトンの多様性と海洋循環によって規制される海洋の窒素貯蔵庫です
1University of California Los Angeles, Los Angeles, California 90095, USA. tweber@atmos.ucla.edu
Nature
|September 22, 2012
まとめ
海の植物プランクトンである.
科学分野:
- 海洋生態学 海洋生態学とは
- バイオジオケミストリー バイオジオケミストリー
- 海洋学 海洋学とは
背景:
- 海洋植物プランクトンの窒素とリンの平均比率 (16N:1P) は,海洋水 (14.3N:1P) とほぼ一致しています.
- このバランスは,海洋の窒素予算の生物学的コントロールに起因し,非窒素化細菌とダイアゾトロフィック植物プランクトンが重要な役割を果たした.
研究 の 目的:
- 植物プランクトンの代謝多様性の海洋の窒素とリン予算への影響を調査する.
- モデル化と観測された海洋窒素欠乏の間の不一致を調和させるため.
主な方法:
- リアルな海洋循環モデルを利用した.
- 統合された多様な植物プランクトンの窒素とリン (N:P) の要求は,均一なN:P比を超えて進んでいます.
- ダイアゾトロフと高N:Pの植物プランクトン群の間の競争をモデル化した.
主要な成果:
- モデルにおける均一なN:P比は,観察値の2倍の窒素欠乏を生じさせた.
- 多様な植物プランクトンを含むN:Pの要件は,海洋の窒素在庫を増加させた.
- 浅い循環は,窒素とリンの比率がプランクトンの平均値を超えるのを防ぐために不可欠であると特定されました.
結論:
- 植物プランクトンの代謝多様性は,海洋の栄養循環を正確にモデル化するために不可欠です.
- 海洋循環パターンは,固定窒素の分布と利用可能性に大きな影響を与えます.
- 大規模なプランクトンの多様性と循環は,海洋の窒素在庫の重要な決定要因である.
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