グローバルな植物プランクトンの減少は,過去100年にわたって続いている
Daniel G Boyce1, Marlon R Lewis, Boris Worm
1Biology Department, Dalhousie University, Halifax, Nova Scotia, Canada, B3H 4J1. dboyce@dal.ca
Nature
|July 31, 2010
まとめ
グローバルな植物プランクトン濃度は,1899年以来,毎年約1%減少しており,海洋生態系に影響を与えています. 海洋温度の上昇と結びついたこの1世紀に渡る傾向は,短期的な気候変動による変動と対照的です.
科学分野:
- マリン・バイオロジー マリン・バイオロジー
- 海洋学 海洋学とは
- 気候科学 気候科学
背景:
- 植物プランクトンは,地球の有機物質生産の約半分を担う重要な海洋光栄養生物です.
- 過去の衛星データ (1979年以来) は,数十年間の変動を示したが,長期の傾向を示すのに十分な長さがなかった.
研究 の 目的:
- 1899年から現在までの植物プランクトンバイオマストレンドを,地域,地域,そして地球規模で再構築し,分析する.
- 観察された植物プランクトンの変動と長期的な変化の要因を調査する.
主な方法:
- 歴史的な海洋透明度測定とインシットクロロフィルの観測を組み合わせた.
- 統計的方法を使用して,時間に依存する植物プランクトンバイオマスを分析しました.
主要な成果:
- 研究された10の海洋地域のうち8のフィトプランクトン濃度の減少が観察されました.
- 推定の世界平均減少率は,年間約1%である.
- 年間間/十年間変動と気候指数,そして長期の傾向と海面温度上昇との間の相関を特定した.
結論:
- グローバルな植物プランクトン濃度は,過去100年にわたって著しく減少しています.
- 海面温度の上昇は,観測された長期的減少の重要な要因である.
- この"世紀に渡る衰退は,将来の海洋生態系,地化学,漁業の研究で考慮する必要がある.
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