Glacial flora

Japanese: 氷河植物群 - ひょうがしょくぶつぐん(英語表記)glacial flora
Glacial flora
During the Quaternary Pleistocene, at least four cold climates struck, during which time North America and most of central and northern Europe were covered by continental glaciers. As a result, many of the temperate plant groups of Quaternary origin, such as deciduous broadleaf forests of beech, oak, and silver maple, which had previously occupied a wide area of ​​the Northern Hemisphere, either became extinct in these areas or migrated south. Today, they remain in temperate regions and are distributed in an isolated manner.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
第四紀更新世には,少なくとも4回にわたって寒冷気候が襲来し,その期間中,北半球では北アメリカ大陸ならびに中部および北部ヨーロッパの大半の地域が,大陸氷河によっておおわれた時期があった。このため,それまで北半球の広い範囲を占有していたブナ,ミズナラ,イタヤカエデなどの落葉広葉樹林に代表される第四紀起源の温帯性植物群の多くは,これらの地域では絶滅するか南部へ移住した。今日では,それらのものが温帯地域に残存し,隔離的に分布している。

出典 株式会社平凡社世界大百科事典 第2版について 情報

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