海面温度上昇が南大西洋のペラジック魚類の熱帯化を引き起こしている

Rodrigo Sant'Ana¹, Daniel Thá¹, Lea-Anne Henry²

¹Laboratório de Estudos Marinhos Aplicados, Escola Politécnica, Universidade do Vale do Itajaí (UNIVALI), Rua Uruguai 458, Itajaí 88302-901, Brazil.

Biology

|September 4, 2025

まとめ

海洋温暖化により南大西洋の漁業が熱帯化しています海洋生物多様性の大きな変化を示し,漁業管理に影響を及ぼしています.

科学分野:

海洋生物学
漁業科学
気候変動の影響

背景:

海洋温暖化が海洋生物の分布に変化をもたらしています
亜熱帯地域では温暖な水域が低緯度から種を惹きつけるため"熱帯化"が進行しています
海洋漁業は生態系の健康と人間の経済にとって極めて重要であり,環境変化の敏感な指標となっています.

研究の目的:

南大西洋のペラジック漁業における熱帯化の兆候を調査する.
捕獲の構成と平均温度における時間的変化を分析する.
これらのシフトに対する海面温度 (SST) とブラジル電流輸送の影響を評価する.

主な方法:

1978年から2018年のペラジック漁業の捕獲データ分析
漁獲の組成,種の熱的好み,気候データに関する調査
コミュニティの変化を追跡するために,オーディネーション方法とベータ多様性の推定を適用する.

主要な成果:

漁獲の平均気温の有意な上昇が観測され,温水種への移行が示された.
温水種の割合は調査期間中に著しく増加した.
増加したSSTと変化したブラジル流れの輸送は,これらの観察された変化の主要な原動力として特定されました.

結論:

南大西洋のペラジック生態系は熱帯化が進んでおり,冷水から温水種の優位性が明らかに変化しています.
海洋温暖化が海洋生物多様性に及ぼす深刻な影響を強調しています
観測された変化は,持続可能な漁業管理と生態系サービスの提供に重大な影響を及ぼします.

キーワード:

南大西洋気候変動海洋漁業捕獲の平均温度 (MTC)ペラジックメガファウナ熱帯化

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