A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae)
Increasingly, molecular approaches are uncovering biodiversity that was previously unrecognized by traditional morphological taxonomy. Cryptic or pseudo-cryptic species are commonly documented in freshwater environments, where isolation of dispersal-limited taxa in fragmented hydrological networks o...
| Main Authors: | , , |
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| Format: | Journal article |
| Language: | English |
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Oxford University Press
2018
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| _version_ | 1797078894685192192 |
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| author | Wood, LE De Grave, S Daniels, SR |
| author_facet | Wood, LE De Grave, S Daniels, SR |
| author_sort | Wood, LE |
| collection | OXFORD |
| description | Increasingly, molecular approaches are uncovering biodiversity that was previously unrecognized by traditional morphological taxonomy. Cryptic or pseudo-cryptic species are commonly documented in freshwater environments, where isolation of dispersal-limited taxa in fragmented hydrological networks often results in high intraspecific genetic divergence. The present study compares the genetic structuring of two co-distributed species of the freshwater shrimp genus Caridina, Caridina africana and Caridina typus, across their South African distributional range using the COI marker and a multilocus dataset comprising mitochondrial (COI, 16S rRNA and 12S rRNA) and nuclear (28S rRNA and H3) markers. Several species delimitation techniques were applied to both the single-locus COI dataset (automatic barcode gap discovery and generalized mixed Yule coalescent) and the multilocus dataset (BPP). Results unambiguously reveal a discordance in phylogeographical structuring between the two species, with C. typus exhibiting genetic homogeneity on this geographical scale, whereas in C. africana three DNA-delimited lineages can be recognized. These cryptic lineages exhibit strong geographical regionalization, with hydrological fragmentation during the last sea-level transgression of the Miocene/Pliocene epochs promoting lineage diversification in combination with low dispersal ability. |
| first_indexed | 2024-03-07T00:38:05Z |
| format | Journal article |
| id | oxford-uuid:82198ceb-fdda-4218-bab6-900b79454e72 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:38:05Z |
| publishDate | 2018 |
| publisher | Oxford University Press |
| record_format | dspace |
| spelling | oxford-uuid:82198ceb-fdda-4218-bab6-900b79454e722022-03-26T21:35:00ZA comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae)Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:82198ceb-fdda-4218-bab6-900b79454e72EnglishSymplectic ElementsOxford University Press2018Wood, LEDe Grave, SDaniels, SRIncreasingly, molecular approaches are uncovering biodiversity that was previously unrecognized by traditional morphological taxonomy. Cryptic or pseudo-cryptic species are commonly documented in freshwater environments, where isolation of dispersal-limited taxa in fragmented hydrological networks often results in high intraspecific genetic divergence. The present study compares the genetic structuring of two co-distributed species of the freshwater shrimp genus Caridina, Caridina africana and Caridina typus, across their South African distributional range using the COI marker and a multilocus dataset comprising mitochondrial (COI, 16S rRNA and 12S rRNA) and nuclear (28S rRNA and H3) markers. Several species delimitation techniques were applied to both the single-locus COI dataset (automatic barcode gap discovery and generalized mixed Yule coalescent) and the multilocus dataset (BPP). Results unambiguously reveal a discordance in phylogeographical structuring between the two species, with C. typus exhibiting genetic homogeneity on this geographical scale, whereas in C. africana three DNA-delimited lineages can be recognized. These cryptic lineages exhibit strong geographical regionalization, with hydrological fragmentation during the last sea-level transgression of the Miocene/Pliocene epochs promoting lineage diversification in combination with low dispersal ability. |
| spellingShingle | Wood, LE De Grave, S Daniels, SR A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae) |
| title | A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae) |
| title_full | A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae) |
| title_fullStr | A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae) |
| title_full_unstemmed | A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae) |
| title_short | A comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species (Crustacea: Decapoda: Atyidae) |
| title_sort | comparative evolutionary study reveals radically different scales of genetic structuring within two atyid shrimp species crustacea decapoda atyidae |
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