関連する実験動画
Updated: Nov 13, 2025

06:10
Using Generative Art to Convey Past and Future Climate Transitions
Published on: March 31, 2023
1.3K
気候と人間に対する後四季期のメガファウナの種特有の反応
Eline D Lorenzen1, David Nogués-Bravo, Ludovic Orlando
1Centre for GeoGenetics, University of Copenhagen, Øster Voldgade 5-7, DK-1350 Copenhagen K, Denmark.
Nature
|November 4, 2011
まとめ
気候変動は,四四年紀後期の大型哺乳類集団に著しく影響を与えた. 気候のみがいくつかの絶滅を引き起こした一方で,気候変動と組み合わせた人間の活動が他の絶滅を引き起こし,複雑な絶滅の要因を強調しました.
科学分野:
- パレオントロジー・パレオントロジー
- 気候科学 気候科学
- 遺伝学 遺伝学とは
背景:
- 大型哺乳類の四半期末期の絶滅は,重要な古生物学的な出来事である.
- これらの絶滅における気候変動と人間の影響の相対的な役割は議論されている.
研究 の 目的:
- 晩四半期期の主要な大型哺乳類種の人口史を調査する.
- 気候変動と人間の活動が種の生存や絶滅に及ぼす影響を区別する.
主な方法:
- 人口の歴史を再構築するために古代DNAの分析.
- 生息地の変化を評価するための種分布モデリング.
- 相互作用の証拠を探すためにヒトの化石記録の調査.
主要な成果:
- 過去5万年の人口変動の主な要因は気候であった.
- 種は,気候の変化,生息地の変化,人間の存在に対する様々な反応を示した.
- 気候変動だけで,毛糸のサイとユーラシアの牛の絶滅が説明できる.
- 気候と人為的な要因の組み合わせにより,ユーラシアの草原野牛と野生の馬が絶滅した.
結論:
- 絶滅の原因は種によって異なるが,ある種は気候によってのみ引き起こされ,ある種は気候と人間要因の組み合わせによって引き起こされる.
- 絶滅した種と生存している種との間に明確な遺伝的または範囲に基づく区別は見つかりませんでした.
- 将来の哺乳類の環境変化への反応を予測することは,複雑な相互作用のために依然として困難です.
関連する概念動画
What is Climate?
19.9K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
19.9K
Global Climate Change
27.9K
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.
27.9K
Threats to Biodiversity
25.4K
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...
25.4K
The Fossil Record
26.5K
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...
26.5K
Habitat Fragmentation
20.4K
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
20.4K
What is Evolutionary History?
41.4K
Scientists record evolutionary history by analyzing fossil, morphological, and genetic data. The fossil record documents the history of life on Earth and provides evidence for evolution. However, both fossil and living organisms offer evidence that outlines Earth’s evolutionary history.
41.4K

