Data from: Hybridization at an ecotone: ecological and genetic barriers between three Iberian vipers

Pedro Tarroso, Ricardo J. Pereira, Fernando Martínez-Freiría, Raquel Godinho & José Carlos Brito
The formation of stable genetic boundaries between emerging species is often diagnosed by reduced hybrid fitness relative to parental taxa. This reduced fitness can arise from endogenous and/or exogenous barriers to gene flow. Although detecting exogenous barriers in nature is difficult, we can estimate the role of ecological divergence in driving species boundaries by integrating molecular and ecological niche modelling tools. Here, we focus on a three-way secondary contact zone between three viper species (Vipera...
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