プランクトンネットワークは,オリゴトロフィック海洋における炭素の輸出を促す
Lionel Guidi1,2, Samuel Chaffron3,4,5, Lucie Bittner6,7,8
1Sorbonne Universités, UPMC Université Paris 06, CNRS, Laboratoire d'oceanographie de Villefranche (LOV), Observatoire Océanologique, Villefranche-sur-Mer, France.
Nature
|February 11, 2016
まとめ
生物学的炭素ポンプは 深い海に炭素を吸収します 特定のプランクトン群と微生物遺伝子は 栄養素が少ない水域での炭素の輸出と相関しており このプロセスの主要な原動力を明らかにしています
科学分野:
- 海洋生物学
- 海洋学
- 生地化学
背景:
- 生物学的炭素ポンプ (BCP) は大気中のCO2を有機炭素に変換し 深海に排出します
- プランクトンコミュニティの構成はBCPの強度に影響しますが,このプロセスを駆動する特定の生態系構造は十分に理解されていません.
研究 の 目的:
- プランクトンコミュニティの構造とオリゴトロフ海洋における炭素の輸出の関係を調査する.
- 炭素の輸出に関連する重要な分類と微生物の遺伝子を特定する.
主な方法:
- "タラ・オーシャンズ"探検の 環境データと 遺伝学データを活用した
- 表面と深層のクロロフィルの最大層からプランクトン群を分析した.
- 150mの炭素輸出と相関するコミュニティの構成と遺伝子の豊富さ
主要な成果:
- ラジオラリア,アルベオラート寄生虫,シネココックス,そのファージを含む特定のプランクトン群は,炭素の輸出と強く関連しています.
- 特定の細菌やウイルスの遺伝子の相対的な豊富さは,オリゴトロフ地域における炭素輸出の変動性を有意に予測する.
結論:
- プランクトンコミュニティの構成と特定の微生物遺伝子は,オリゴトロフ海洋における炭素輸出効率の決定的要因である.
- 予期せぬ分類は 生物学的な炭素ポンプで重要な役割を果たします
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