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Updated: Jul 5, 2026
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An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium
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陸上の食物網を通して水中の水銀の移動
Daniel A Cristol1, Rebecka L Brasso, Anne M Condon
1Institute for Integrative Bird Behavior Studies, Department of Biology, College of William and Mary, Williamsburg, VA 23185, USA. dacris@wm.edu
Science (New York, N.Y.)
|April 19, 2008
まとめ
川からの水銀汚染が陸上の生態系に侵入しています. 陸上の歌う鳥は,主に汚染されたクモを食べることで,高い水銀濃度を示し,潜在的な健康リスクをもたらします.
科学分野:
- 環境科学 環境科学
- 生態毒理学 エコトキシコロジ
- 野生生物生物学 野生生物生物学
背景:
- 全世界の河川は水銀で汚染され,水生生物と人間の健康に悪影響を及ぼしています.
- 水鳥は,しばしば水銀汚染の指標として使用されます.
- 水銀は,トロフィック経路を経由して水生生態系から陸生生態系に移動することができる.
研究 の 目的:
- 汚染された川の近くの陸上の鳥の水銀濃度を調査するために.
- 陸上の歌う鳥の食生活における水銀の供給源を決定するために.
- 陸上の食物網における水銀バイオマグニフィケーションのリスクを評価する.
主な方法:
- 血液サンプルは,バージニア州の水銀で汚染された川沿いの陸上鳥と水中鳥から採取されました.
- 水銀の源を特定するために,食事の分析が行われました.
- 鳥の血中の水銀濃度は,種と生息地間で比較されました.
主要な成果:
- 陸上の鳥の血中水銀濃度は,水生鳥の血中水銀濃度に匹敵する.
- 蜘蛛は,陸上の鳥の食生活における水銀の重要な源として特定されました.
- 歌う鳥の水銀レベルは,潜在的に有害な健康効果を示唆しています.
結論:
- 水中の水銀汚染は,隣接する陸上の生息地にも広がる可能性があります.
- 水銀のトロフィック転送とバイオマグニフィケーションは,陸上の生態系で起こります.
- 沿岸の無脊椎動物は,水銀のベクターとして作用し,陸上の鳥類の個体群にリスクをもたらします.
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