巨大な植物プランクトンが北極海の氷の下で咲いています
Kevin R Arrigo1, Donald K Perovich, Robert S Pickart
1Department of Environmental Earth System Science, Stanford University, Stanford, CA 94305, USA. arrigo@stanford.edu
まとめ
北極海の固い海氷の下,大規模な植物プランクトン開花が発見された. この発見は,以前の仮定に異議を唱え,北極の一次生産が著しく過小評価されている可能性を示唆しています.
科学分野:
- 海洋学 海洋学 海洋学
- マリン・バイオロジー マリン・バイオロジー
- アークティック・リサーチ・アークティック研究
背景:
- 北極海の植物プランクトン開花は,伝統的に,氷のない水域でのみ発生すると考えられていた.
- 海氷の薄まりと溶融池の増加は,北極のシェルフ地域における光の浸透を高めています.
研究 の 目的:
- チュクチ海で集結したパック氷の下で発生する大規模な植物プランクトン開花を記録し,特徴づけること.
- 北極の原産物の見積もりに対する氷の下の開花の影響を評価する.
主な方法:
- 厚い海氷の下での植物プランクトンの開花の現場観察とサンプル採取.
- 植物プランクトンのバイオマス,成長率,原産物の測定.
- 光の伝達に影響を与える環境要因の分析.
主要な成果:
- ダイアトムの支配下にあるかなりのフィトプランクトン開花は,氷の縁から遠く,凝固したパック氷の下で特定されました.
- ダイアトームの成長と一次生産の高い割合は,氷の下の咲きの中で記録されました.
- 氷が薄くなり,溶けた池が溶け,光の伝達が増加したため,花開きが容易になりました.
結論:
- 固い北極海氷の下では,以前から考えられていたこととは対照的に,大規模な植物プランクトン開花が起こる可能性があります.
- 氷の下の開花は,栄養が豊富な北極のシェルフでより一般的です.
- 北極の原産物の現在の衛星ベースの推定値は,実際の値を大幅に過小評価し,潜在的に最大10倍まで下回る可能性があります.
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