侵攻が激しい河口の侵攻率の加速
1A. N. Cohen, San Francisco Estuary Institute, 1325 South 46 Street, Richmond, CA 94804, USA. J. T. Carlton, Maritime Studies Program, Williams College-Mystic Seaport, Post Office Box 6000, Mystic, CT 06355, USA.
Science (New York, N.Y.)
|January 28, 1998
まとめ
生物の侵入は,環境と経済に重大な脅威をもたらします. サンフランシスコ湾とデルタは,多くのエキゾチックな種と侵攻率の加速により,世界で最も侵攻された河口かもしれません.
科学分野:
- エコロジー エコロジー エコロジー
- 環境科学 環境科学
- 保護生物学の保護生物学
背景:
- 生物の侵入は,世界中の生態系と経済に影響を及ぼし,重大なグローバルな課題を代表しています.
- サンフランシスコ湾とデルタの生態系は,侵略のダイナミクスを研究するための焦点です.
研究 の 目的:
- サンフランシスコ湾とデルタの生物学的侵入の範囲と速度を分析する.
- この河口での高い侵入レベルに貢献する潜在的なドライバーを特定する.
主な方法:
- 生息地における種構成,数量,およびバイオマスの生態学的評価.
- 歴史的および現在の侵略傾向の分析.
- 輸送ベクターや生息地の破壊などの潜在的要因の評価.
主要な成果:
- 相当数のエキゾチックな種が確立し,種,個体数,バイオマスによって多数の生息地を支配しています.
- 新しい侵入の割合は高く,加速しているようです.
- サンフランシスコ湾とデルタは,世界的に最も侵攻された河口となる可能性があるという特徴を示しています.
結論:
- サンフランシスコ湾とデルタは深刻な生物の侵入に直面しており,生態学と経済に重大な影響を及ぼしています.
- この高い侵入レベルに寄与する要因には,多様な輸送ベクトル,多様性の少ない本土種プール,広範囲な生息地破壊が含まれます.
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