A test of the riverine barrier hypothesis in the largest subtropical river basin in the Neotropics
© 2020 John Wiley & Sons Ltd..
The riverine barrier hypothesis proposes that large rivers represent geographical barriers to gene flow for terrestrial organisms, leading to population differentiation and ultimately allopatric speciation. Here we assess for the first time if the subtropical Paraná-Paraguay River system in the Del Plata basin, second in size among South American drainages, acts as a barrier to gene flow for birds. We analysed the degree of mitochondrial and nuclear genomic differentiation in seven species with known subspecies divided by the Paraná-Paraguay River axis. Only one species showed genetic differentiation concordant with the current river channel, but another five species have an east/west genetic split broadly coincident with the Paraná River's dynamic palaeochannel, suggesting this fluvial axis has had a past role in shaping present-day genetic structure. Moreover, dating analyses show that these splits have been asynchronous, with species responding differently to the riverine barrier. Comparisons informed by the geological history of the Paraná River and its influence on the ecological and climatic differences among ecoregions in the study area further bolster the finding that responses to this geographical barrier have been species-specific.
| Errataetall: |
CommentIn: Mol Ecol. 2020 Jun;29(12):2129-2132. - PMID 32392379 |
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| Medienart: |
E-Artikel |
| Erscheinungsjahr: |
2020 |
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| Erschienen: |
2020 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:29 |
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| Enthalten in: |
Molecular ecology - 29(2020), 12 vom: 24. Juni, Seite 2137-2149 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Kopuchian, Cecilia [VerfasserIn] |
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| Links: |
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| Themen: |
Birds |
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| Anmerkungen: |
Date Completed 04.06.2021 Date Revised 04.06.2021 published: Print-Electronic Dryad: 10.5061/dryad.83bk3j9n1 CommentIn: Mol Ecol. 2020 Jun;29(12):2129-2132. - PMID 32392379 Citation Status MEDLINE |
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| doi: |
10.1111/mec.15384 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM306505096 |
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| 245 | 1 | 2 | |a A test of the riverine barrier hypothesis in the largest subtropical river basin in the Neotropics |
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| 520 | |a © 2020 John Wiley & Sons Ltd. | ||
| 520 | |a The riverine barrier hypothesis proposes that large rivers represent geographical barriers to gene flow for terrestrial organisms, leading to population differentiation and ultimately allopatric speciation. Here we assess for the first time if the subtropical Paraná-Paraguay River system in the Del Plata basin, second in size among South American drainages, acts as a barrier to gene flow for birds. We analysed the degree of mitochondrial and nuclear genomic differentiation in seven species with known subspecies divided by the Paraná-Paraguay River axis. Only one species showed genetic differentiation concordant with the current river channel, but another five species have an east/west genetic split broadly coincident with the Paraná River's dynamic palaeochannel, suggesting this fluvial axis has had a past role in shaping present-day genetic structure. Moreover, dating analyses show that these splits have been asynchronous, with species responding differently to the riverine barrier. Comparisons informed by the geological history of the Paraná River and its influence on the ecological and climatic differences among ecoregions in the study area further bolster the finding that responses to this geographical barrier have been species-specific | ||
| 650 | 4 | |a Journal Article | |
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| 650 | 4 | |a Palaeo-channel | |
| 650 | 4 | |a Parana-Paraguay River system | |
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| 700 | 1 | |a Campagna, Leonardo |e verfasserin |4 aut | |
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| 700 | 1 | |a García, Natalia C |e verfasserin |4 aut | |
| 700 | 1 | |a Lavinia, Pablo D |e verfasserin |4 aut | |
| 700 | 1 | |a Tubaro, Pablo L |e verfasserin |4 aut | |
| 700 | 1 | |a Lovette, Irby |e verfasserin |4 aut | |
| 700 | 1 | |a Di Giacomo, Adrián S |e verfasserin |4 aut | |
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