Files for phylogenetics, structure, and migration rate analyses for the bivalve Aequiyoldia eightsii
The Antarctic Circumpolar Current (ACC) dominates the open-ocean circulation of the Southern Ocean, and both isolates and connects the Southern Ocean biodiversity. However, the impact on biological processes of other Southern Ocean currents is less clear. Adjacent to the West Antarctic Peninsula (WA...
| Main Authors: | , , , , , , , , |
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| Format: | Dataset |
| Language: | unknown |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://zenodo.org/record/4020739 https://doi.org/10.5061/dryad.0cfxpnvxr |
| Summary: | The Antarctic Circumpolar Current (ACC) dominates the open-ocean circulation of the Southern Ocean, and both isolates and connects the Southern Ocean biodiversity. However, the impact on biological processes of other Southern Ocean currents is less clear. Adjacent to the West Antarctic Peninsula (WAP), the ACC flows offshore in a northeastward direction, whereas the Antarctic Peninsula Coastal Current (APCC) follows a complex circulation pattern along the coast, with topographically-influenced deflections depending on the area. Using genomic data, we estimated genetic structure and migration rates between populations of the benthic bivalve Aequiyoldia eightsii from the shallows of southern South America and the WAP to test the role of the ACC and the APCC in its dispersal. We found strong genetic structure across the ACC (between southern South America and Antarctica) and moderate structure between populations of the West Antarctic Peninsula. Migration rates along the WAP were consistent with the APCC being important for species dispersal. Along with supporting current knowledge about ocean circulation models at the WAP, migration from the tip of the Antarctic Peninsula to the Bellingshausen Sea highlights the complexities of Southern Ocean circulation. This study provides novel biological evidence of a role of the APCC as a driver of species dispersal and highlights the power of genomic data for aiding in the understanding of complex oceanographic processes. Description for input files: "Input1_COI_Sequences.nex" contains mitochondrial DNA COI sequences used to build an haplotype network in POPART (Leigh and Bryant 2015) "Input2_NextRad_All.phy" is a concatenated data set using full-length reads, that includes not only the SNPs, but also the invariable sites for 41 individuals. This data was used to estimate a ML tree with RAxML v.8.1.16 (Stamatakis 2014) "Input3_NextRad_All.stru" is a Structure file created with the complete data set (41 individuals) and a minimum of 10 individuals with data for the locus to ... |
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