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Updated: Jul 12, 2026

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まとめ
グアダルピアン期における絶滅率の高さは,化石記録の遺物ではなく,実際の大量絶滅であった. ペルミア紀は2つの主要な絶滅の出来事を経験し,ペルミア紀の最終的な危機は,海洋生物の80%を絶滅させた.
科学分野:
- パレオントロジー・パレオントロジー
- マリン・バイオロジー マリン・バイオロジー
- 地質学の歴史 地質学史
背景:
- パレオゾーイク時代の終わりには,大規模な絶滅が起きました.
- 以前の推定では,ペルミア期末期の危機で海洋生物の95%~96%が失われていると推測されていた.
- グアダルーピアの絶滅の深刻さと原因は議論された.
研究 の 目的:
- グアダルピアン期における高絶滅率が化石記録の遺物であったかどうかを判断する.
- ペルム後期絶滅期における分類学的損失の大きさを正確に評価する.
- グアダルーピアンと終末のペルミアン絶滅の事件を区別するために.
主な方法:
- グアダルーピアンとペルミアン後期期の化石データの分析.
- 保存バイアスを排除するために絶滅率の統計的評価.
- 2つの異なるペルム危機における分類学的損失の比較.
主要な成果:
- 化石データは,グアダルーピアの絶滅率は人工物ではなく,大規模な大量絶滅を表していることを確認しています.
- グアダルーピの絶滅は,過去5億年で最大の大量絶滅の1つでした.
- 終末期のペルム危機は,海洋種の約80%を絶滅させ,以前のより高い見積もりを見直した.
結論:
- グアダルーピアの絶滅は,重大で突然の生物学的危機でした.
- 後期ペルム紀の分類学的損失は,グアダルプ紀の出来事と終期のペルム紀の危機の間に分布した.
- 終末期のペルム紀の危機は,深刻であったものの,以前に推定されたよりも破滅的ではなく,海洋生物の80%に影響を与えた.
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