A new perspective on the zoogeography of the sibling mouse-eared bat species Myotis myotis and Myotis blythii: Morphological, genetical and ecological evidence
A new perspective on the zoogeography of the sibling mouse-eared bat species Myotis myotis and Myotis blythii: Morphological, genetical and ecological evidence
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DOI：
10.1111/j.1469-7998.1997.tb02928.x
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发表时间：
1997-05-01
影响因子：
2
通讯作者：
Hausser, J
中科院分区：
文献类型：
--
作者：
Arlettaz, R;Ruedi, M;Hausser, J
在古北区西部广泛分布的两种近亲鼠耳蝙蝠Myotis myotis和Myotis blythii的实际地理分布仍然存在很大争议。这尤其涉及来自地中海岛屿以及北非和亚洲邻近地区的边缘种群的具体归属，这些地区在形态上介于欧洲大陆的Myotis和Blythii之间。本研究试图通过四种不同的方法来阐明这一问题：颅骨形态、外部形态、遗传学和营养生态学。后三种方法明确地表明，北非、马耳他、撒丁岛和科西嘉岛目前居住着单一种类的肌分枝杆菌种群。相比之下，颅骨形态测量并不能得出确凿的结果。这些结果与最近的所有研究相矛盾，这些研究将北非和马耳他的鼠耳蝠归因于布利蒂伊分枝杆菌，并认为撒丁岛和科西嘉岛拥有这两个物种的同域种群。关于东南部种群，还对Omari亚种分类群的归属表示怀疑，该亚种分类群实际上可能指的是M.myotis而不是M.blythii。目前，蛋白质电泳法是确定肌分枝杆菌和布氏分枝杆菌分布范围的唯一绝对方法。然而，物种鉴定可以依靠不那么复杂的形态计量学方法来进行，如本研究所述。物种特有的栖息地专门化可能是观察到的Myotis和M.blythii地理分布差异的原因，因为它们为这两个蝙蝠物种物种形成的一致模型提供了逻辑基础。
The actual geographic distribution of the two sibling mouse-eared bat species Myotis myotis and Myotis blythii, which occur widely sympatrically in the western Palaearctic region, remains largely controversial. This concerns particularly the specific attribution of marginal populations from the Mediterranean islands and from adjacent areas of North Africa and Asia, which are morphologically intermediate between continental M. myotis and M. blythii from Europe. This study attempts to clarify this question by using four different approaches: cranial morphology, external morphology, genetics and trophic ecology. The three latter methods show unambiguously that North Africa, Malta, Sardinia and Corsica are presently inhabited by monospecific populations of M. myotis. In contrast, cranial morphometrics do not yield conclusive results. These results contradict all recent studies, which attribute North African and Maltese mouse-eared bats to M. blythii and consider that Sardinia and Corsica harbour sympatric populations of the two species. As concerns south-eastern populations, doubts are also expressed about the attribution of the subspecific taxon omari which may actually refer to M. myotis instead of M. blythii. Protein electrophoresis is presently the only absolute method available for determining M. myotis and M. blythii throughout their distribution ranges. However, species identification may be approached by relying on less sophisticated morphometrical methods as presented in this study. Species-specific habitat specializations are probably responsible for the differences observed between the geographic distributions of M. myotis and M. blythii, as they provide a logical groundwork for a coherent model of speciation for these two bat species.