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![]() Albeit interesting because of their high rates of speciation, most of these are geographically narrowly confined and limited in the number of species 11, 12. Most modern species assemblages of continental Europe seem to have assembled by immigration from elsewhere rather than by in situ adaptive radiations, with minor exceptions among flowering plants, butterflies, and fish in large lakes 9, 10. This part of the world, whose natural history has been most thoroughly explored, has shown little evidence of extensive adaptive radiations. Europe, after Antarctica, stands out at the low end of global biological diversity 7, 8. They have played a significant role in the origin of extant diversity in many major clades across the globe 3, 5, 6. This discovery sheds new light on the biodiversity of Europe.Īdaptive radiations are large bursts of speciation from single ancestors, accompanied by extensive ecological diversification 1, 2, 3, 4, 5. Emerging subterranean environments likely provided unoccupied, predator-free space, constituting ecological opportunity, a key trigger of adaptive radiation. Their spatio-temporal origin coincides with the uplift of carbonate massifs in South-Eastern Europe 15 million years ago. Our modelling of lineage diversification and evolution of morphological and ecological traits using a time-calibrated multilocus phylogeny suggests a major adaptive radiation, comprised of multiple subordinate adaptive radiations. ![]() Here we provide evidence of an entirely subterranean adaptive radiation of the amphipod genus Niphargus, counting hundreds of species. Subterranean environments, which are dark and food-deprived, yet buffered from climate change, have preserved ancient lineages. However, not all legacy of old radiations has been lost. An exception is modern Europe, where descendants of ancient adaptive radiations went extinct, and extant adaptive radiations are small, recent and narrowly confined. ![]() ![]() Adaptive radiations are bursts of evolutionary species diversification that have contributed to much of the species diversity on Earth. ![]() |
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