Pleistocene occurrences of the European pond tortoise (Emys orbicularis L.) in Britain
Pleistocene occurrences of the European pond tortoise (Emys orbicularis L.) in Britain
复制标题
英国欧洲池塘龟（Emys orbillaryis L.）更新世的出现
DOI：
10.1111/j.1502-3885.1979.tb00818.x
复制
发表时间：
2008
期刊：
影响因子：
2.2
通讯作者：
A. Stuart
中科院分区：
文献类型：
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作者：
A. Stuart
Emys orbicularis是世界上最北繁殖的龟类，存在于欧洲南部和中部，但今天不在不列颠群岛。七月平均气温超过18度C，似乎是物种成功繁殖的必要条件。在英国，E.现在可以从Cromerian Hoxnian，Ipswichian和Flandrian温带阶段获得orbicularis，这表明平均7月温度至少比现在高2摄氏度。大多数可用的材料是伊普斯维奇（= Eemian）年龄，跨越了这个温带阶段的大部分时间，并表明即使在接近尾声的夏季温度普遍较高。英语只有一个E。与斯堪的纳维亚南部的众多发现相比，Flandrian时代的orbicularis可以追溯到气候最佳时期，可能反映了西北部海洋更凉爽和潮湿的夏季的普遍性。
Emys orbicularis is the most northerly-breeding chelonian in the world, present in southern and central Europe, but absent from the British Isles at the present day. Mean July temperatures well in excess of 18dC appear necessary for the living species to breed successfully. In England records of E. orbicularis are now available from the Cromerian Hoxnian, Ipswichian and Flandrian temperate stages, suggesting mean July temperatures at least 2dC warmer than now. Most of the available material is of Ipswichian (= Eemian) age, spanning most of this temperate stage and indicating generally high summer temperatures even near the end. On the other hand there is only one English E. orbicularis of Flandrian age, dating from the climatic optimum, compared with numerous finds in southern Scandinavia, probably reflecting the prevalence of cooler and damper summers in the more oceanic northwest.