Carling and Zuckerberg ( 2011 ) demonstrated a different trend through a 40‐ to 50‐year genetic study of the Passerina bunting hybrid zone by documenting significant narrowing of hybrid cline width through time and a nearly significant shift in center, which suggests a reduction in hybridization across that contact zone.
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Quantifying the spatiotemporal dynamics in a chorus frog (Pseudacris) hybrid zone over 30 years.
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