カンブリア紀からトリアシク初期までの海洋無脊椎動物の生物多様性の高解像度概要
Jun-Xuan Fan1,2, Shu-Zhong Shen3,2,4, Douglas H Erwin5,6
1School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China.
Science (New York, N.Y.)
|January 18, 2020
まとめ
この研究は海洋化石から高解像度の生物多様性曲線を示しています 二酸化炭素のレベルなどの環境要因は 生物多様性の変化と明確な相関関係を示していません
科学分野:
- 古生物学
- 古代気候学
- 生物多様性科学
背景:
- 生物多様性の変化の原動力を理解することは 進化史にとって極めて重要です
- 環境の変化は海洋生物に 大きく影響しますが その正確な関係については まだ議論が続いています
研究 の 目的:
- カンブリア紀からトライアス紀までの高解像度生物多様性曲線を構成する.
- 環境要因,特に二酸化炭素レベルと海洋生物多様性のパターンとの相関を調査する.
主な方法:
- 3千以上の層図で 11,000種の海洋化石のデータを合成した.
- 生物多様性曲線を生成するためにシミュレートされた冷却と遺伝子アルゴリズムを使用しました.
- 二酸化炭素 (PCO2) の部分圧力を含む環境データとの比較分析を行った.
主要な成果:
- 約2万6000年の時間解像度で詳細なカンブリア~トリアス生物多様性曲線を生成した.
- 生物多様性とPCO2の傾向の間の表面的な類似性が確認され,損なわれた後に統計的に確認されませんでした.
- 古生物学的な仮説を時間的・分類的詳細で解決する化石データの能力を実証した.
結論:
- 高解像度の化石データは 過去の多様化と絶滅の時期を明らかにできます
- 研究期間中の海洋生物多様性とPCO2レベルとの間の明確な関連は見つかりませんでした.
- 化石記録は 長期的な生態学と進化論の仮説を 検証するための 堅固な基盤を提供します
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