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ダイナミックな海洋で頂点の海洋捕食者の動きを追跡する.
B A Block1, I D Jonsen, S J Jorgensen
1Stanford University, Biology Department, Hopkins Marine Station, Pacific Grove, California 93950, USA. bblock@stanford.edu
Nature
|June 24, 2011
まとめ
海洋捕食動物は,過剰搾取と気候変動による課題に直面しています. 電子タグ付けは,北太平洋の移住パターンと重要な生息地を明らかにし,保全の取り組みを支援しています.
科学分野:
- 海洋生態学 海洋生態学とは
- 保護生物学の保護生物学
- 海洋学 海洋学 海洋学
背景:
- ペラジック型の海洋捕食動物は,過剰搾取と気候の変動によって脅かされています.
- 捕食者の生態を理解することは,絶滅を防止し,生態系サービスを維持するために不可欠です.
- 電子タギングの進歩により,海洋動物の大規模な追跡が可能になります.
研究 の 目的:
- 北太平洋のペラジック捕食者の移動経路を分析する.
- 海洋学的な特徴を多種のホットスポットとニッチ分割と結びつける.
- 海洋生態系の空間管理に不可欠な生息地を特定する.
主な方法:
- 北太平洋の23種の生物に4,306個の電子タグを設置 (2000年~2009年)
- 265,386の追跡日をカバーする大規模な追跡データセットの分析.
- 動物の移動データを海洋学プロセスと統合する.
主要な成果:
- 捕食者ギルドの特定された移住経路と季節的な南北移動.
- カリフォルニア流と北太平洋の移行地帯内の多種ホットスポットに海洋特性をリンクした.
- コンゲナー・ギルド内およびその間のイラスト化されたニッチ・パーティション.
結論:
- カリフォルニア流と北太平洋の移行地帯は,多様な海洋脊椎動物にとって極めて重要です.
- 捕食者の移動は,海洋プロセス,耐熱性,獲物の利用可能性によって影響を受けます.
- 特定された多国籍の重要な生息地は,空間的な生態系管理の基盤を提供します.
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