アンチョーからサーディン,そして戻り:太平洋の数十年にわたる変化
Francisco P Chavez1, John Ryan, Salvador E Lluch-Cota
1Monterey Bay Aquarium Research Institute, 7700 Sandholdt Road, Moss Landing, CA 95039, USA. chfr@mbari.org
Science (New York, N.Y.)
|January 11, 2003
まとめ
太平洋の生態系は50年間の気候サイクルを示し,アンチョウとサーディンの個体数に影響を与えます. これらの自然の変動は,気候変動を理解し,漁業の管理に不可欠です.
科学分野:
- 海洋生態学 海洋生態学とは
- 気候科学 気候科学
- 漁業科学 漁業科学 漁業科学
背景:
- 太平洋の生態系は,温度,CO2および種の豊富さの長期的な変動を示しています.
- 1970年代半ばのアンチョビからサーディン体制への移行のような自然的な気候の変化が観察されています.
- これらの体制は,海洋学および生態学的条件によって特徴づけられています.
研究 の 目的:
- 長期 (約1年) を分析するために 50年) の太平洋における自然の変動.
- "アンチョビ"と"サーディン"の政権の間の歴史的な変化を理解するために.
- 人為的な気候変動と漁業管理の文脈における自然気候変動の重要性を強調する.
主な方法:
- 空気と海洋の気温に関する歴史的なデータの分析.
- 大気中の二酸化炭素濃度の調査.
- アンチョビとサーディンの捕獲データに関するレビュー.
- 沿岸部と開いた海の生態系の生産性の評価.
主要な成果:
- 太平洋の気候と生態系の生産性で確認された50年周期.
- 冷たい (アンチョウ) から暖かい (サーディン) に移行する体制は,1970年代半ばに起こりました.
- その後,90年代半ばから後半にかけて,アンチョウの管理体制への移行が観察されました.
結論:
- 大規模で自然発生する気候変動は,太平洋の生態系と漁業に大きな影響を及ぼします.
- これらの自然サイクルを理解することは,人間による気候変動の影響を正確に評価するために不可欠です.
- 海洋生物資源の効果的な管理には,これらの10年規模の気候変動を考慮する必要があります.
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