ペルミアン末期の絶滅から回復する過程で,炭素循環の大規模な乱れが発生した
Jonathan L Payne1, Daniel J Lehrmann, Jiayong Wei
1Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138, USA. jpayne@fas.harvard.edu
まとめ
ペルミアン-トライアスク境界の炭素同位体遠征は,多くの初期のトライアスクの変動の最初でした. この炭素循環の不安定さは,地球で最も深刻な大量絶滅の後,生命の回復を遅らせました.
科学分野:
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- 地質化学 地質化学
- パレオントロジー・パレオントロジー
背景:
- ペルミアン-トライアスの境界は,地球で最も深刻な大量絶滅の出来事を示しています.
- この境界で,有意な炭素同位体脱出が見られる.
- このイベントの後の生態系の回復は著しく遅れた.
研究 の 目的:
- パルム・トライアス境界から続く炭素循環の乱れの期間と範囲を調査する.
- 炭素循環の振る舞いを生物学的回復のペースと相関させるため.
- ペルム紀末期の絶滅による長期的な環境的影響を理解する.
主な方法:
- 高解像度の炭素同位体測定.
- 中国南部の複数の断面のストラティグラフィック分析.
- 生物学的再多様化を評価するための化石記録分析.
主要な成果:
- パルム・トライアス境界における炭素同位体の逸脱は孤立した現象ではなく,一連の変動を引き起こした.
- これらの炭素循環の変動はトライアシク初期にわたって持続し,トライアシク中期初期に終わった.
- ペルミア期末絶滅から化石ベースの回復が遅れたことは,これらの炭素循環異常と相関していた.
結論:
- カーボン循環は,ペルミア期末絶滅の後に長期にわたる不安定さを経験した.
- 地球システム機能,特に炭素循環は,生物学的再多様化に直接影響した.
- これらの過去の出来事を理解することで,大量絶滅後の生態系の回復力についての洞察が得られます.
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