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Global Climate Change01:50

Global Climate Change

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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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The fossil record documents only a small fraction of all organisms that have ever inhabited Earth. Fossilization is a rare process, and most organisms never become fossils. Moreover, the fossil record only exhibits fossils that have been discovered. Nevertheless, sedimentary rock fossils of long-lived, abundant, hard-bodied organisms dominate the fossil record. These fossils offer valuable information, such as an organism's physical form, behavior, and age. Studying the fossil record helps...
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気候変動による絶滅

Mark C Urban1,2,3

  • 1Department of Ecology and Evolutionary Biology, University of Connecticut, Storrs, CT, USA.

Science (New York, N.Y.)
|December 5, 2024
PubMed
まとめ
この要約は機械生成です。

気候変動は種絶滅を加速し,特に地球温暖化が1.5°Cを超えると これは全ての種の3分の"を 脅かしており 緊急に保護の取り組みが必要であることを 強調しています

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科学分野:

  • エコロジー
  • 気候科学
  • 保護生物学

背景:

  • 気候変動は地球上の生物多様性にとって 重要なリスクですが 確実ではありません
  • 気候変動に対する 種の脆弱性を予測することは 効果的な保全に不可欠です

研究 の 目的:

  • 気候変動による絶滅の量的な評価を行うこと
  • 総合的な分析のために既存の研究と予測を統合する.

主な方法:

  • 485件の研究のメタ解析
  • 500万種以上の種を 含んでいる.

主要な成果:

  • 絶滅率は1.5°Cの温暖化を超えて著しく加速すると予測されています.
  • 地球の生物の3分の"が 絶滅の危機に瀕しています
  • 両生類,山/島/淡水種,そして南米,オーストラリア,ニュージーランドのものは最も脆弱です.
  • 気候変動による絶滅の割合は 1970年以降増加しています

結論:

  • 大量絶滅を防ぐには 温室効果ガスの緊急緩和が不可欠です
  • 気候変動の危機で 脆弱な種を保護するには 標的を絞った保全戦略が不可欠です
  • 人為的な気候変動を阻止し逆転させることは 生物多様性の長期的な保全に不可欠です