| Title | Cryptic diversity and multiple origins of the widespread mayfly species group Baetis rhodani (Eph.: Baetidae) on northwestern Mediterranean islands |
| Abstract | How the often highly endemic biodiversity of islands originated has been debated for decades, and it remains a fervid research ground. Here, using mitochondrial and nuclear gene sequence analyses, we investigate the diversity, phylogenetic relationships, and evolutionary history of the mayfly Baetis gr. rhodani on the three largest northwestern Mediterranean islands (Sardinia, Corsica, Elba). We identify three distinct, largely co-distributed, and deeply differentiated lineages, with divergences tentatively dated back to the Eocene-Oligocene transition. Bayesian population structure analyses reveal a lack of gene exchange between them, even at sites where they are syntopic, indicating that these lineages belong to three putative species. Their phylogenetic relationships with continental relatives, together with the dating estimates, support a role for three processes contributing to this diversity: (1) vicariance, primed by microplate disjunction and oceanic transgression; (2) dispersal from the continent; and (3) speciation within the island group. Thus, our results do not point toward a prevailing role for any of the previously invoked processes. Rather, they suggest that a variety of processes equally contributed to shape the diverse and endemic biota of this group of islands. |
| Source | Ecology and evolution 6 (21), pp. 7901–7910 |
| Keywords | BaetisdispersalIsland biogeographyMediterranean basinTyrrhenian islandsvicariance |
| Journal | Ecology and evolution |
| Editor | Wiley-Blackwell, Oxford, Regno Unito |
| Year | 2016 |
| Type | Articolo in rivista |
| DOI | 10.1002/ece3.2465 |
| Authors | Bisconti, Roberta; Canestrelli, Daniele; Tenchini, Roberta; Belfiore, Carlo; Buffagni, Andrea; Nascetti, Giuseppe |
| Text | 384788 2016 10.1002/ece3.2465 ISI Web of Science WOS 000387120800030 Scopus 2 s2.0 84991112523 Baetis dispersal Island biogeography Mediterranean basin Tyrrhenian islands vicariance Cryptic diversity and multiple origins of the widespread mayfly species group Baetis rhodani Eph. Baetidae on northwestern Mediterranean islands Bisconti, Roberta; Canestrelli, Daniele; Tenchini, Roberta; Belfiore, Carlo; Buffagni, Andrea; Nascetti, Giuseppe Univ Tuscia; CNR IRSA How the often highly endemic biodiversity of islands originated has been debated for decades, and it remains a fervid research ground. Here, using mitochondrial and nuclear gene sequence analyses, we investigate the diversity, phylogenetic relationships, and evolutionary history of the mayfly Baetis gr. rhodani on the three largest northwestern Mediterranean islands Sardinia, Corsica, Elba . We identify three distinct, largely co distributed, and deeply differentiated lineages, with divergences tentatively dated back to the Eocene Oligocene transition. Bayesian population structure analyses reveal a lack of gene exchange between them, even at sites where they are syntopic, indicating that these lineages belong to three putative species. Their phylogenetic relationships with continental relatives, together with the dating estimates, support a role for three processes contributing to this diversity 1 vicariance, primed by microplate disjunction and oceanic transgression; 2 dispersal from the continent; and 3 speciation within the island group. Thus, our results do not point toward a prevailing role for any of the previously invoked processes. Rather, they suggest that a variety of processes equally contributed to shape the diverse and endemic biota of this group of islands. 6 Published version Cryptic diversity and multiple origins of the widespread mayfly species group Baetis rhodani on northwestern Mediterranean islands Brhodani_Bisconti_et_al_2016_Ecology_and_Evolution.pdf Articolo in rivista Wiley Blackwell 2045 7758 Ecology and evolution Ecology and evolution Ecology and evolution andreastefano.buffagni BUFFAGNI ANDREA STEFANO DTA.AD002.026.001 GESTIONE SOSTENIBILE DEGLI ECOSISTEMI ACQUATICI E RISPOSTA AGLI IMPATTI DI ORIGINE NATURALE ED ANTROPICA MONTEROTONDO BRUGHERIO BARI |
