Phylogeography of Potamon ibericum (Brachyura: Potamidae) identifies Quaternary glacial refugia within the Caucasus biodiversity hot spot
| Autor: | Samaneh Solhjouy-Fard, Christoph D. Schubart, Farahnaz Sheibak, Elaheh Parvizi, Alireza Keikhosravi, Reza Naderloo |
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| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Potamidae 0303 health sciences education.field_of_study Ecology biology Species distribution Population Biodiversity biology.organism_classification 010603 evolutionary biology 01 natural sciences Biodiversity hotspot 03 medical and health sciences Phylogeography Geography Genetic structure Potamon ibericum education Ecology Evolution Behavior and Systematics 030304 developmental biology Nature and Landscape Conservation |
| Zdroj: | Ecology and Evolution. 9:4749-4759 |
| ISSN: | 2045-7758 |
| Popis: | Refugia are critical for the maintenance of biodiversity during the periods of Quaternary climatic oscillations. The long-term persistence of refugial populations in a large continuous refugium has resulted in a homogenous pattern of genetic structure among populations, while highly structured evolutionary lineages characterize the restriction of refugial populations to smaller subrefugia. These mechanisms have resulted in the identification of hot spots of biodiversity within putative glacial refugia. We studied phylogeography of Potamon ibericum (Brachyura: Potamidae) in the drainages of the western Caucasus biodiversity hot spot (i.e., Colchis and the Caucasus) to infer spatial genetic structure and potential refugia for a freshwater crab in this region. These areas have traditionally considered as a refugium due to the presence of Tertiary relict species. We integrated population genetic data and historical demographic analysis from cytochrome oxidase subunit I sequences and paleoclimatic data from species distribution modeling (SDM). The results revealed the lack of phylogeographic structure and provided evidence for demographic expansion. The SDM presented a rather homogenous and large refugium that extended from northeast Turkey to Colchis during the last glacial period. In contrast to these findings, previous phylogeographic study on P. ibericum of the eastern Caucasus biodiversity hot spot (i.e., Hyrcania) identified multiple independent refugia. By combining these results, we explain the significance of this important western Palearctic hot spot of biological diversity in shaping the geographic distribution of intraspecific genetic diversity in a freshwater taxon. |
| Databáze: | OpenAIRE |
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