コロラドのロッキー山脈の野生動物のカドミウム毒性
J R Larison1, G E Likens, J W Fitzpatrick
1Section of Ecology and Evolutionary Biology, Cornell University, Ithaca, New York 14853, USA. larisonj@ucs.orst.edu
Nature
|July 26, 2000
まとめ
野生生物におけるカドミウム有毒性は,これまで考えられていたよりも広く存在している可能性があります. この有毒な金属の微量量でさえ,動物の健康,集団,種の分布に影響を及ぼします.
科学分野:
- 環境科学 環境科学
- 毒理学 毒理学 毒理学
- 野生生物生物学 野生生物生物学
背景:
- カドミウムは,土壌,水,植物に見られる有毒でいたるところに存在する重金属です.
- 鉱山のような人間の活動により,カドミウムの環境への移動性が増加します.
- 野生生物におけるカドミウムによる有毒性の報告は,微量元素として頻繁に発生しているため,まれである.
研究 の 目的:
- ホワイトテイル・プターミガン (Lagopus leucurus) の食物網と組織におけるカドミウム濃度を調査する.
- 自然の脊椎動物集団におけるカドミウム毒性の流行と影響を評価する.
- 微量カドミウムへの曝露が個々の生物と種の人口統計にどのように影響するかを理解する.
主な方法:
- 食品ネットワークにおける微量金属濃度測定.
- ホワイトテイル・プターミガン (Ptarmigan) の組織に含まれるカドミウムレベルを分析した.
- カドミウム曝露と野生生物の健康指標との関係を評価した.
主要な成果:
- ホワイトテイル・プターミガンの食物網と組織にカドミウムが検出されました.
- 結果は,カドミウム有毒性は,以前に認識されたよりも自然集団でより一般的かもしれないことを示唆しています.
- 微量でもカドミウムへの曝露は,個々の生理学,健康,および種の人口統計に影響を与える可能性があります.
結論:
- 野生生物におけるカドミウム毒性は,過小評価され,過小評価されている可能性があります.
- 微量カドミウムへの曝露は,野生動物の健康と人口動態に大きな影響を及ぼします.
- カドミウム汚染による生態学的影響を完全に理解するためには,さらなる研究が必要である.
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