Climate change induced hybridization in flying squirrels
Climate change induced hybridization in flying squirrels
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DOI：
10.1111/j.1365-2486.2009.01948.x
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发表时间：
2010-01-01
影响因子：
11.6
通讯作者：
Wilson, Paul J.
中科院分区：
文献类型：
--
作者：
Garroway, Colin J.;Bowman, Jeff;Wilson, Paul J.
现在有明确的证据表明全球气候变化;然而，其对进化过程的潜在影响仍然不清楚。许多物种通过地理范围的变化来应对当代气候变化。这可能导致最近分歧的物种之间的同域性增加;可能增加杂交的可能性。最近，经过一系列的暖冬，加拿大安大略的南方飞鼠（Glaucomys volans）迅速扩大了它们的北方活动范围，导致与密切相关的北方飞鼠（Glaucomys sabrinus）的同域性增加。这提供了一个机会，以测试预测，当代气候变化可以作为一种催化剂，创造条件，形成混合区。通过大量的采样和分子分析（细胞核和线粒体DNA），我们确定了同域分布的G。sabrinus和G.飞蚊鱼有证据的回交，但没有广泛的渗入，最近而不是历史杂交的假设相一致。据我们所知，这是第一次报告的混合区形成后，由当代气候变化引起的范围扩大。这也是北美飞鼠物种间杂交的首次报道。
There is now unequivocal evidence for global climate change; however, its potential impacts on evolutionary processes remain unclear. Many species have responded to contemporary climate change through shifts in their geographic range. This could lead to increased sympatry between recently diverged species; likely increasing the potential for hybridization. Recently, following a series of warm winters, southern flying squirrels (Glaucomys volans) in Ontario, Canada rapidly expanded their northern range limit resulting in increased sympatry with the closely related northern flying squirrel (Glaucomys sabrinus). This provided the opportunity to test the prediction that contemporary climate change can act as a catalyst creating conditions for the formation of hybrid zones. Following extensive sampling and molecular analyses (nuclear and mitochondrial DNA), we identified the occurrence of hybridization between sympatric G. sabrinus and G. volans. There was evidence of backcrossing but not of extensive introgession, consistent with the hypothesis of recent rather than historic hybridization. To our knowledge, this is the first report of hybrid zone formation following a range expansion induced by contemporary climate change. This is also the first report of hybridization between North American flying squirrel species.