| Abstract | An extreme radiation of hundreds of species of different groups of animals occurred in Lake Baikal, Siberia, Russia; among them, amphipods represent one of the most remarkable groups of invertebrates with about 350 endemic species. Amphipods host associated epibiont rotifers, and the aim of the study is to explore the possibility that bdelloid rotifers living as epibionts on amphipods in Lake Baikal coevolved with their hosts and diversified with species-specific host-epibiont associations. We sampled 148 individual amphipods belonging to 16 species and isolated all epibiont bdelloids from them, discovering that only one bdelloid species, Embata parasitica, lives associated with at least six amphipod species belonging to three different families. Similar to what is known in most other bdelloid species, the morphospecies Embata parasitica from Lake Baikal is likely to be a complex of cryptic species, as suggested by the high genetic diversity we found in one mitochondrial marker sequenced from several animals. Yet none of the divergent genetic lineages seemed to be associated to only one or a few amphipod species. In addition, nine bdelloid species were found living in the lake, increasing the known diversity of the area to 12 bdelloid species. |
| Text | 481833 2023 10.1080/24750263.2023.2205875 rotifera Limited diversity of epibiont bdelloid rotifers and no pattern of codiversification with the highly diverse endemic amphipods of a coastal zone of Lake Baikal Diego Fontaneto, Elisa Sottoriva, Alejandro Rodriguez Gijon, Daria Bedulina, Anton Gurkov, Oleg A. Timoshkin Viatcheslav N. Ivanenko Molecular Ecology Group MEG , Water Research Institute IRSA , National Research Council of Italy CNR , Verbania Pallanza, Italy Department of Ecology, Environment, and Plant Sciences, Science for Life Laboratory, Stockholm University, Stockholm, Sweden Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, Germany Institute of Biology, Irkutsk State University, Irkutsk, Russia Limnological Institute, Siberian Branch, Russian Academy of Sciences, Irkutsk, Russia Department of Biology, Shenzhen MSU BIT University, Shenzhen, P. R. China Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia An extreme radiation of hundreds of species of different groups of animals occurred in Lake Baikal, Siberia, Russia; among them, amphipods represent one of the most remarkable groups of invertebrates with about 350 endemic species. Amphipods host associated epibiont rotifers, and the aim of the study is to explore the possibility that bdelloid rotifers living as epibionts on amphipods in Lake Baikal coevolved with their hosts and diversified with species specific host epibiont associations. We sampled 148 individual amphipods belonging to 16 species and isolated all epibiont bdelloids from them, discovering that only one bdelloid species, Embata parasitica, lives associated with at least six amphipod species belonging to three different families. Similar to what is known in most other bdelloid species, the morphospecies Embata parasitica from Lake Baikal is likely to be a complex of cryptic species, as suggested by the high genetic diversity we found in one mitochondrial marker sequenced from several animals. Yet none of the divergent genetic lineages seemed to be associated to only one or a few amphipod species. In addition, nine bdelloid species were found living in the lake, increasing the known diversity of the area to 12 bdelloid species. 90 Published version https //www.tandfonline.com/doi/full/10.1080/24750263.2023.2205875 baikal Limited diversity of epibiont bdelloid rotifers and no pattern of codiversification with the highly diverse endemic amphipods of a coastal zone of.pdf Articolo in rivista 2475 0263 The European Zoological Journal The European Zoological Journal diego.fontaneto FONTANETO DIEGO |
