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Ecological Impacts of Reverse Speciation in Threespine Stickleback [Current Biology]

par Frédéric Magné - publié le

Young species are highly prone to extinction via increased gene flow after human-caused environmental changes [1–6]. This mechanism of biodiversity loss, often termed reverse speciation or introgressive extinction, is of exceptional interest because the parent species are typically highly differentiated ecologically. Reverse speciation events are potentially powerful case studies for the role of evolution in driving ecological changes, as the phenotypic shifts associated with introgressive extinction can be large and they occur over particularly short timescales. Furthermore, reverse speciation can lead to novel phenotypes [1, 2], which may in turn produce novel ecological effects.(...)

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