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地球温暖化,標高の変動,湿気のある熱帯の低地生物の枯渇
Robert K Colwell1, Gunnar Brehm, Catherine L Cardelús
1Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT 06269, USA. colwell@uconn.edu
Science (New York, N.Y.)
|October 11, 2008
まとめ
地球温暖化により熱帯生物種が脅かされ,低地の生物多様性が著しく減少しています. 多くの熱帯生物種は,間もなく範囲のギャップに直面し,山頂の絶滅につながる可能性があります.
科学分野:
- エコロジー エコロジー エコロジー
- 気候変動 生物学 生物学
- 生物多様性研究 生物多様性研究
背景:
- 地球温暖化は,種の範囲を極点に向かって移動させ,温帯地域ではより高い標高に移動させることが文書化されています.
- 熱帯生物の生息範囲が変化している証拠は限られているが,上昇斜面を好む浅い気温のグラデーションにもかかわらず.
研究 の 目的:
- 予測される気候温暖化の下,低地生物の枯渇,生息地移転のギャップ,および熱帯生態系における山頂の絶滅の可能性を評価する.
- コスタリカの植物と昆虫の標高の範囲に関する新しいデータを分析する.
主な方法:
- コスタリカのエリヴェーション・トランセクトから得られた新しいデータを活用して.
- 植物や昆虫種の分布データを高さグラデーションに沿って分析する.
- 将来の温暖化シナリオの下での潜在的な範囲シフトと範囲シフトのギャップをモデル化.
主要な成果:
- 熱帯低地生物群は,実質的な生物の減退を経験すると予測されています.
- 熱帯生物種の高い割合が,高地層の範囲のギャップに直面すると予想されます.
- アップスルップシフトは,熱帯の気温グラデーションにより,極方向シフトよりも高い確率です.
結論:
- 熱帯の低地種は,より高い緯度で前例のない独特の枯渇の脅威に直面しています.
- 予測される気候変動は,範囲のシフトのギャップと熱帯生物種の潜在的絶滅の重大なリスクをもたらします.
- 保護戦略は,熱帯生物多様性の温暖化に対する特定の脆弱性に対処しなければならない.
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