化石記録の完全性の絶対的な尺度
1Department of the Geophysical Sciences, University of Chicago, Illinois 60637, USA. mfoote@midway.uchicago.edu
Nature
|September 7, 2001
まとめ
化石記録とは,化石の記録である.
科学分野:
- パレオントロジー・パレオントロジー
- 進化生物学の進化生物学について
- マリン・バイオロジー マリン・バイオロジー
背景:
- 進化のパターンを理解するには,化石記録の完全性を正確に測定する必要があります.
- 以前の完全性調査は,範囲と分類学的幅が限られていた.
- 保存特性は生物群によって大きく異なる.
研究 の 目的:
- 化石記録の完全性に関する定量的,絶対的な測定値を提示し,比較する.
- 海洋動物高等分類の広範なサンプルの完全性を評価する.
- 進化史を評価するための広く適用可能な方法を提供すること.
主な方法:
- ストラトグラフィック間隔ごとに属の保存の確率を推定する.
- 化石の発生がある既存のファミリーの割合を決定する.
- 異なるデータと計算を用いた2つの異なる完全性測定値を比較する.
主要な成果:
- 化石記録の完全性に関する2つの新しい定量的な測定法を開発した.
- 異なるデータ依存関係にもかかわらず,2つの測定値の間の高い相関度が見つかりました.
- 化石記録の完全性は,多くの海洋動物集団にとって一般的に高いことが判明しました.
結論:
- 提示された方法は,化石記録の完全性に関する堅実で広く適用可能な評価を提供します.
- 高い完全性は,多くの海洋分類種の長期的な進化パターンの信頼性の高い洞察を示唆しています.
- 将来の研究では,これらの測定法を使用して,多様な生物群の進化的比較を精密にすることができます.
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