...On the other hand, when both populations coexist in the same area, the relationship between the two is called sympatric. This theory is supported by many scholars, and claims that by cutting off the exchange of genes, natural selection and random drift of genes in response to the local environment will work effectively, resulting in the formation of new species relatively quickly. In addition, patterns of morphological change in ancient organisms are being reexamined using this allopatric speciation as a model. In organisms where polyploidy is common, sympatric speciation is possible, and some scholars consider speciation due to disruptive selection or ecological causes, but there is no doubt that in many cases geographic isolation is the trigger for speciation. ... *Some of the terminology explanations that mention "allopatric speciation" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…逆に両集団が同一地域に共存する場合には両者の関係を同所的という),遺伝子の交流が断たれることにより,その場の環境に応じた自然淘汰と遺伝子の機会的浮動が効果的に働き,比較的急速に新種が形成されることを主張するもので,多くの学者の賛同を得ている。またこの異所的種分化allopatric speciationをモデルにして,古生物の形態変化のパターンが再検討されている。倍数性が普通にみられる生物では同所的種分化sympatric speciationの可能性があり,分断淘汰や生態的な原因による種分化を考える学者もあるが,多くの場合地理的隔離が種分化のきっかけとなることは疑いない。… ※「allopatric speciation」について言及している用語解説の一部を掲載しています。 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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