THE GEOGRAPHICAL DISTRIBUTION OF THE ISOPODS ASELLUS AQUATICUS (L.) AND A. MERIDIANUS RAC.
THE GEOGRAPHICAL DISTRIBUTION OF THE ISOPODS ASELLUS AQUATICUS (L.) AND A. MERIDIANUS RAC.
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ISOPODS ASELLUS AQUATICUS (L.) 和 A. MERIDIANUS RAC 的地理分布。
DOI：
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发表时间：
1962
期刊：
影响因子：
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通讯作者：
W. Williams
中科院分区：
文献类型：
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作者：
W. Williams
而水盾壳霉和A.该种可能存在于西欧的淡水地区，在同一地区的类似地区可能只包含一个或其他，或没有这些物种。尽管已经提出了一些建议，但迄今为止还没有对这种局部分布模式提出完整的解释。本文讨论了这两个种的地理分布，并对局部分布提出了解释。建议A.在西欧的两个物种中，A. aquaticus是一种冰后期移民，目前仍在继续扩散并取代A.我是阿纳斯
Whilst both Asellus aquaticus and A. meridianus may be present in freshwater localities in western Europe, similar localities in the same region may contain only one, or other, or neither of these species. Hitherto no complete explanation of this pattern of local distribution has been presented, although several suggestions have been advanced. In this paper the geographical distribution of the two species is discussed, and an explanation of the local distribution put forward. It is suggested that A. meridianus is the older of the two species in western Europe, and that A. aquaticus is a post-glacial immigrant which is still spreading and replacing A. meridianus.