絶滅の負債とブラジルのアマゾンの保全機会の窓
Oliver R Wearn1, Daniel C Reuman, Robert M Ewers
1Imperial College London, Silwood Park, Ascot SL5 7PY, UK.
まとめ
種絶滅の予測は難しい. 新しい方法により,ブラジルのアマゾンのほとんどの脊椎動物の絶滅は,歴史的な生息地喪失により,保存の機会が残っているため,まだ起こっていないことが明らかになりました.
科学分野:
- エコロジー エコロジー エコロジー
- 保護生物学の保護生物学
- 生物多様性 科学 科学 生物多様性
背景:
- 将来の種の絶滅の正確な予測は,効果的な保全資金調達に不可欠です.
- 絶滅のタイミングと規模を評価することは,特に生息地の喪失に関して,保全生物学における重要な課題です.
研究 の 目的:
- 時間の経過とともに種の絶滅を予測するための新しい方法論を開発し,適用する.
- 絶滅の予測における生息地喪失の時間的動態と規模を考慮するために.
- ブラジルのアマゾンにおける現在と将来の絶滅負債を評価する.
主な方法:
- 種の絶滅に関する新しい予測モデルの開発.
- モデルに生息地喪失のタイミングと規模を統合する.
- モデルをブラジルのアマゾンの森林に依存する脊椎動物種に適用する.
主要な成果:
- 2008年までにブラジルのアマゾンで森林に依存する脊椎動物の最小の局所的な絶滅 (1%)
- 絶滅の80%以上は,過去の生息地喪失の結果として予測されており,将来の絶滅負債を表しています.
- 現実的な森林伐採シナリオでは,2050年までに9種の脊椎動物と16種の絶滅が予測されています.
結論:
- ブラジルのアマゾンでは,絶滅の重大な負債が存在し,ほとんどの絶滅はまだ明らかになっていない.
- 歴史的な森林伐採の影響を,標的を絞った保全を通じて緩和するための重要な窓がある.
- 絶滅負債が最も高い地域での保全を優先することは,生息地喪失の遺産を薄くすることができます.
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