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変化する海で,現代のプランクトンフォラミニフェラには,移動だけでは不十分です
Sonia Chaabane1,2,3, Thibault de Garidel-Thoron4, Julie Meilland5
1Aix-Marseille Université, CNRS, IRD, INRAE, CEREGE, Aix-en-Provence, France. sonia.chaabane@gmail.com.
Nature
|November 13, 2024
まとめ
プランクトン系フォラミニフェラ (PF) は 気候変化に反応して 極地へ移動し,深さを変化させています しかし このような移動は 海洋温暖化と酸性化に伴って 生き残るには 十分ではないかもしれません
科学分野:
- 海洋生物学
- 海洋学
- 気候変動科学
背景:
- 海洋温暖化と酸化を引き起こしています.
- これらの変化はプランクトンの生息地や プランクトンホルミニフェラ (PF) のようなカルシフィー化生物を脅かしている.
- PFの急速な環境変化への適応能力は不明である.
研究 の 目的:
- 気候変化に反応する プランクトン型フォラミニフェラの 移動行動を調査する
- 過去100年にわたって PFの総数変化と適応戦略を評価する.
- 予測された海洋条件下での PFの将来の生存可能性を予測する.
主な方法:
- FORCISのデータセットから百年にわたる世界人口普查を分析した.
- 横方向 (極方向) と垂直方向の移動パターンの調査
- 将来の物理化学環境のモデル化と PFへの影響
主要な成果:
- PFは極に向かって移動し,より高い緯度で多様性を増しています.
- いくつかの種は水柱に下降を示しています.
- フォラミニファルの総量は80年間で24.2%減少した.
- 2050/2100年の予測条件は,低緯度種の現在の許容範囲を超えています.
- 極の移動は低緯度の多様性を減少させる可能性があります.
結論:
- プランクトン型は極地や垂直に移動していますが この適応は不十分かもしれません
- 海洋の温暖化と酸化は PFの生存に重大な脅威をもたらします
- 気候変動のストレス要因が海洋生態系に及ぼす影響について,緊急に研究が必要です.
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