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6600万年ぶりの 絶滅の危機? 人類による絶滅を文脈化
Jack H Hatfield1,2, Bethany J Allen3,4,5, Tadhg Carroll1,2,6
1Leverhulme Centre for Anthropocene Biodiversity, University of York, York, UK.
Global change biology
|September 4, 2025
まとめ
ヒトの活動により 種が急速に絶滅し 大半のケノゾイク時代を上回る可能性があります 現在 生物多様性の危機の規模は 未来の人間の行動に 依存しています
科学分野:
- 古生物学
- エコロジー
- 保護生物学
背景:
- 生物のコミュニティは 人間の活動によって前例のない変化に直面しています
- 脊椎動物種の絶滅率が高いことが 第6次の大量絶滅の可能性を示唆しています
- 過去の大量絶滅は 6600万年前の白亜紀・古亜紀の出来事のように 歴史的な文脈を示しています
研究 の 目的:
- 過去の大量絶滅の規模と 現在の絶滅の規模を比較するためです
- 地球が最後に絶滅した時期を 調べるためだ
- 人類の活動が絶滅率を 歴史的に有意なレベルに押し上げているかどうかを評価する.
主な方法:
- 過去6600万年 (ケノゾイク時代) の絶滅の出来事に関する文献レビュー.
- 絶滅率と規模を比較した分析
- 地質学的記録に対する現在の生物多様性の損失の評価
主要な成果:
- 現在の絶滅エピソードは 大きくても 6600万年前のボリド衝突の規模には及ばないのです
- 進行中の絶滅は,大概他のケノゾイク絶滅を上回っている.
- エオセノ・オリゴセノ移行 (3400万年前) は現在の出来事と競合するかもしれないが,データは不確実である.
結論:
- 現在の絶滅の規模は,まだ白亜期の大量絶滅に匹敵しません.
- 人類による絶滅の割合は 大半のケノゾイク時代を上回っている.
- この絶滅の未来の規模は 人類の反応と 生物圏との相互作用に左右されます
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