https://www.live-feeds.com/feed/japan-s-2011-tsunami-sparked-fish-hybridization-but-species-boundaries-largely-heldContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/japan-s-2011-tsunami-sparked-fish-hybridization-but-species-boundaries-largely-heldhttps://www.live-feeds.com/feed/japan-s-2011-tsunami-sparked-fish-hybridization-but-species-boundaries-largely-held#u93910Fri, 02 Oct 2026 00:24:28 +0000The 2011 Japan tsunami led to hybridization between freshwater and marine threespine stickleback fish in a newly formed wetland. However, a nine-year genomic study revealed rapid elimination of foreign DNA, with marine-derived genomic regions almost completely removed within ten generations. This purging of foreign genetic material helped maintain species boundaries, despite extensive hybridization.Why it mattersThe study provides insight into how species boundaries are maintained in the face of environmental disturbance, a fundamental question in evolutionary biology. The research has implica