ハリケーン後のトカゲの種と面積の関係を自然に回復させる
T W Schoener1, D A Spiller, J B Losos
1Section of Evolution and Ecology, University of California, Davis, CA 95616, USA. twschoener@ucdavis.edu
Science (New York, N.Y.)
|November 17, 2001
まとめ
ハリケーン・フロイドは,バハミア諸島での個体群を壊滅させた. アノリス・サグレイトカゲの回復に不可欠な島域は,嵐後の重要な予測要因として再現し,種の分布を回復しました.
科学分野:
- エコロジー エコロジー エコロジー
- 動物学 動物学
- 島のバイオジオグラフィー
背景:
- ハリケーン・フロイドは1999年9月にバハマ諸島66島を襲いました.
- この研究は,アノリス・サグレイ (Anolis sagrei) と呼ばれる,一般的なの種に重点を置いています.
研究 の 目的:
- ハリケーン・フロイドがアノリス・サグレイの群れに及ぼす影響を記録する.
- 大規模なハリケーンの後,サカの集団の回復に影響を与える要因を理解する.
- 種面積分布パターンの変化を分析する.
主な方法:
- ハリケーン・フロイドの前後に66の島で実施されたフィールド調査.
- アノリス・サグレイの発生を島の面積と高度に関連して評価する.
- ハリケーン後の19ヶ月間にわたる人口回復の監視.
主要な成果:
- 島の面積は当初,高度よりもアノリス・サグレイの発生を予測するのに優れていた.
- ハリケーン直後,高さはよりよい予測力となり,低地にあるトカゲが絶滅した.
- 19ヶ月以内に,かつて占領されていた島の88%が再植民地化され,島の面積が回復を促しました.
結論:
- 自然災害は,種の分布を劇的に変えてしまう.
- 島の面積は,災害後の島の集団の回復に重要な役割を果たしています.
- 自然の植民と生殖過程を通じて,種と領域の関係を迅速に回復させることができます.
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