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進化の時間における生態学的ニッチの保守主義
Peterson1, Sober n J, Sanchez-Cordero
1Natural History Museum, The University of Kansas, Lawrence, KS 66045, USA. Instituto de Ecologia, Universidad Nacional Autonoma de Mexico, Mexico, D.F. 04510, Mexico. Departamento de Zoologia, Instituto de Biologia, Universidad Nacional A.
Science (New York, N.Y.)
|August 24, 1999
まとめ
種の生態学的ニッチは,何百万年にもわたって驚くべき安定性を示しており,地理的孤立が生態学的分岐が起こる前に種の発生を促すことを示唆しています. このニッチな保守主義は,進化論に挑戦する.
科学分野:
- 進化生物学の進化生物学について
- エコロジー エコロジー エコロジー
- バイオジオグラフィー バイオジオグラフィー
背景:
- 理論的なモデルは,進化の時間尺度で密接に関連した種間の限られた生態学的ニッチの差別化を予測しています.
- 長期にわたるニッチ保守主義の経験的証拠は,特に多様な分類種において稀である.
研究 の 目的:
- 鳥類,哺乳類,蝶類の姉妹種群における生態学的ニッチ保守主義を何百万年以上にわたって調査する.
- ニッチの保守主義が,種レベルと家族レベルで異なるかどうかをテストする.
主な方法:
- メキシコ南部の姉妹分類のペアのために生態学的ニッチモデルが構築されました.
- 相互の地理的予測は,ニッチの重複と分岐を評価するために使用されました.
- 分析には,鳥,哺乳類,蝶が含まれていました.
主要な成果:
- 重要なニッチ保守主義は,数百万年の独立した進化を経て,種レベルで観察されました.
- 小さなニッチな保守主義は,家族レベルで検出されました.
- 姉妹 taksaは,地理的な分離にもかかわらず,安定した生態学的ニッチを展示しました.
結論:
- 種の発生は,主に生態学的次元ではなく,地理的次元に沿って,長い進化期間にわたって起こります.
- 種間の生態学的差異は,種化イベントの後に進化する傾向があります.
- ニッチ保守主義は,多様化パターンを理解するための枠組みを提供します.
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