コメント on "北スカンジナビアの北極樹の氷河期の生存"
Hilary H Birks1, Thomas Giesecke, Godfrey M Hewitt
1Department of Biology, University of Bergen, Bergen, Norway. hilary.birks@bio.uib.no
Science (New York, N.Y.)
|November 10, 2012
まとめ
この研究は,最後の氷河期にスカンジナビアでPinusとPiceaが生き残ったという証拠に疑問を投げかけています. 方法論的な限界と代替的な説明は,これらの木が氷河期の温暖化後に絶滅した可能性があることを示唆しています.
科学分野:
- パレオボタニーは古植物学です.
- 四次科学とは四次科学である.
- 遺伝学 遺伝学とは
背景:
- 最後の氷河期における北スカンジナビアのピヌスとピセアの生存は議論されている.
- 以前の研究では,これらの分類のために氷河の避難所を提案しています.
研究 の 目的:
- スカンジナビア北部のピヌスとピセアの氷河期生存に関する証拠を批判的に評価する.
- 観察された遺伝データの代替説明を提案する.
主な方法:
- 以前の研究で使用された方法論のレビュー.
- 遺伝子データにおける潜在的な汚染の分析.
- 古代生態学と古代気候学のデータを考慮する.
主要な成果:
- Parducci et al. が使用した方法論 試料の汚染を排除しない.
- 提案されたリフジヤでは,ピヌスとピセアに適した氷河の生息地がない.
- 証拠は,脱氷後のこれらの分類種の絶滅を示唆しています.
結論:
- スカンジナビア北部のピヌスとピセアの氷河期生存に関する証拠は説得力がない.
- 脱氷後の植民地化と絶滅を含む他の仮説は,ピセアハプロタイプA.Piceaのような遺伝子マーカーの分布をよりよく説明します.
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