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首页> 外文期刊>Journal of Zoological Systematics and Evolutionary Research >When recent and evolutionary histories meet: deciphering temporal events from contemporary patterns of mtDNA from fishers (Martes pennanti) in north-eastern North America
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When recent and evolutionary histories meet: deciphering temporal events from contemporary patterns of mtDNA from fishers (Martes pennanti) in north-eastern North America

机译：当最近的历史和进化史相遇时：从北美东北部渔民（Marten pennanti）的当代mtDNA模式中解密时间事件

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摘要

The current spatial distribution of genetic lineages across a region should reflect the complex interplay of both historical and contemporary processes. Postglacial expansion and recolonization in the distant past, in combination with more recent events with anthropogenic effects such as habitat fragmentation and overexploitation, can help shape the pattern of genetic structure observed in contemporary populations. In this study, we characterize the spatial distribution of mtDNA lineages for fisher (Martes pennanti) in north-eastern North America. The history of fishers in this region is well understood and thus provides an opportunity to interpret patterns of genetic structure in the light of known historical (e. g. recolonization from glacial refugia) and contemporary events (e. g. reintroductions, fragmentation and natural recolonization). Our results indicate that fishers likely recolonized north-eastern North America from a single Pleistocene refugium. Three genetically distinct remnant populations persisted through the population declines of the 1800s and served as sources for multiple reintroductions and natural recolonizations that have restored the fisher throughout north-eastern North America. However, the spatial genetic structure of genetic lineages across the region still reflects the three remnant populations.
机译：整个地区遗传谱系的当前空间分布应反映历史和当代过程的复杂相互作用。远古时代的冰川后扩张和再殖民化，再加上具有人为影响的最新事件，例如栖息地破碎和过度开发，可以帮助塑造当代人口的遗传结构格局。在这项研究中，我们表征了北美东北部的渔民（Marten pennanti）的mtDNA谱系的空间分布。该地区的渔民的历史已被很好地理解，因此提供了一个机会，可以根据已知的历史（例如，冰川避难所重新定殖）和当代事件（例如重新引入，破碎和自然重新定殖）来解释遗传结构的模式。我们的结果表明，渔民很可能从单个更新世避难所重新定居了北美东北部。在1800年代人口下降的过程中，三个遗传上不同的残余种群持续存在，并作为多次重新引入和自然再殖民化的来源，这使该渔民在整个北美东北部得以恢复。但是，整个地区的遗传谱系的空间遗传结构仍反映了三个残留种群。

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