Early Pleistocene divergence of Pelagia noctiluca populations (Cnidaria, Medusozoa) between the Atlantic Ocean and the Mediterranean Sea
| Autor: | Andreja Ramšak, Diogo Meyer, Antonio C. Marques, André C. Morandini, David Stanković, Ezequiel Ale |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0303 health sciences Early Pleistocene Pleistocene Aquatic Science Biology Pelagia noctiluca biology.organism_classification CNIDARIA 010603 evolutionary biology 01 natural sciences Mediterranean Basin 18S ribosomal RNA 03 medical and health sciences Oceanography Mediterranean sea Medusozoa Sea level 030304 developmental biology |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | A previous study detected mixing of two deeply split mtDNA clades (Clade I and Clade II) for Atlantic and Mediterranean populations of the medusozoanPelagia noctiluca. The north hemisphere glaciations and the Messinian salinity crisis have been proposed as the two main biogeographic events related to the isolation between the Atlantic Ocean and the Mediterranean Sea. We tested if the splitting time between Clade I and Clade II ofP. noctilucawas associated with one of these geological events. Our study was based on DNA sequence data of mitochondrial (COI and 16S ribosomal RNA) and nuclear (18S ribosomal RNA, internal transcribed spacer 1 and 5.8S ribosomal RNA) genes from populations of the Atlantic and Pacific Ocean and the Mediterranean Sea. The rise of the Isthmus of Panama was used to calibrate substitution rates for COI. This calibration was based on the detection of a shallow but significant genetic structure betweenP. noctilucapopulations from the Pacific and the Atlantic Oceans. Considering our calibration for COI, we refute a possible origin of Clades I and II during the Messinian salinity crisis. Our estimates suggest the origin for a putative common ancestor of Clades I and II around 2.57 Ma (with 95% 2.91–2.22 HPD), roughly corresponding to the Gelasian stage of the early Pleistocene. These alterations include changes in the sea level and oceanic currents at the Strait of Gibraltar and other regions of the Mediterranean basin, and could explain the origin of the twoP. noctilucaclades. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|