Evolutionary history of the seagrass genus Posidonia
| Type | Article | ||||||||
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| Date | 2011 | ||||||||
| Language | English | ||||||||
| Author(s) | Aires Tania, Marba Nuria, Cunha Regina L., Kendrick Gary A., Walker Diana I., Serrao Ester A., Duarte Carlos M., Arnaud-Haond Sophie |
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| Affiliation(s) | Univ Algarve, CCMAR CIMAR, Ctr Marine Sci, P-8005139 Faro, Portugal. IMEDEA CSIC UIB Inst Mediterrani Estudis Avancats, Dept Global Change Res, Esporles 07190, Mallorca, Spain. Univ Western Australia, Sch Plant Biol, Crawley 6009, Australia. IFREMER Technopole Brest Iroise, F-29280 Plouzane, France. |
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| Source | Marine Ecology-progress Series (0171-8630) (Inter-research), 2011 , Vol. 421 , P. 117-130 | ||||||||
| DOI | 10.3354/meps08879 | ||||||||
| WOS© Times Cited | 28 | ||||||||
| Keyword(s) | Posidonia, Phylogeny, Low evolutionary rates, Ancient diversification | ||||||||
| Abstract | Seagrasses are the structural species of one of the most important coastal ecosystems worldwide and support high levels of biodiversity and biomass production. Posidonia is one of the most ancient seagrass genera and displays a contrasting disjunct biogeographic pattern. It contains one single species in the Northern Hemisphere, P. oceanica, which is endemic to the Mediterranean Sea, and has up to 8 recognized taxa in the Southern Hemisphere, which in Australia are divided into 2 complexes, P. ostenfeldii and P. australis. A phylogeny based on a nuclear marker (rRNA-ITS) revealed an ancient split between the northern (i.e. Mediterranean) and southern (i.e. Australian) taxa, followed by a separation of the 2 recognized Australian complexes. However, the species belonging to the P. ostenfeldii complex were indistinguishable, suggesting an ecotypic origin or a recent speciation. Therefore, among the 7 morphologically described Australian species only 4 species lineages can be discriminated. The organelle markers nad7 intron, trnL-F and matK/trnK intron were not informative for reconstructing the phylogeny of this genus, and the mitochondrial markers exhibited a strikingly slow evolutionary rate relative to other genome regions. | ||||||||
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