The influence of Pleistocene climatic changes and ocean currents on the phylogeography of the southern African barnacle, Tetraclita serrata (Thoracica; Cirripedia)

The evolutionary effects of glacial periods are poorly understood for Southern Hemisphere marine intertidal species, particularly obligatory sessile organisms. We examined this by assessing the phylogeographic patterns of the southern African volcano barnacle, Tetraclita serrata, a dominant species...

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Bibliographic Details
Published in:PloS one 2014-07, Vol.9 (7), p.e102115
Main Authors: Reynolds, Terry V, Matthee, Conrad A, von der Heyden, Sophie
Format: Article
Language:English
Subjects:
Agulhas Current
Analysis
Animal behavior
Animals
Bayes Theorem
Bayesian analysis
Benguela Current
Biogeography
Biology and Life Sciences
Cell Nucleus - genetics
Cirripedia
Climate Change
Climate change influences
Coastal ecosystems
Coasts
Contact pressure
Current distribution
Cytochrome
Cytochrome oxidase
Demography
Deoxyribonucleic acid
DNA
DNA, Mitochondrial - chemistry
DNA, Mitochondrial - genetics
DNA, Ribosomal Spacer - genetics
Dominant species
Earth Sciences
Electron Transport Complex IV - genetics
Environmental conditions
Evolution
Evolution, Molecular
Gene flow
Gene sequencing
Genetic analysis
Genetic diversity
Genetic structure
Genetic Variation
Genomics
Geography
Glacial effects
Glacial periods
Glaciers
Haplotypes
Last Glacial Maximum
Mitochondrial DNA
Molecular Sequence Data
Mutation
Ocean circulation
Ocean circulation patterns
Ocean currents
Oceans and Seas
Phylogeny
Phylogeography
Pleistocene
Polymorphism, Genetic
Population
Population genetics
Sea level
Sequence Analysis, DNA
Shores
South Africa
Southern Hemisphere
Spacer
Sympatric populations
Tetraclita
Thoracica - classification
Thoracica - genetics
Volcanoes
Water Movements
Zoology
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Summary:The evolutionary effects of glacial periods are poorly understood for Southern Hemisphere marine intertidal species, particularly obligatory sessile organisms. We examined this by assessing the phylogeographic patterns of the southern African volcano barnacle, Tetraclita serrata, a dominant species on rocky intertidal shores. Restricted gene flow in some geographical areas was hypothesized based on oceanic circulation patterns and known biogeographic regions. Barnacle population genetic structure was investigated using the mitochondrial cytochrome oxidase subunit 1 (COI) region for 410 individuals sampled from 20 localities spanning the South African coast. The mtDNA data were augmented by generating nuclear internal transcribed spacer 1 (ITS1) sequences from a subset of samples. Phylogenetic and population genetic analyses of mitochondrial DNA data reveal two distinct clades with mostly sympatric distributions, whereas nuclear analyses reveal only a single lineage. Shallow, but significant structure (0.0041-0.0065, P
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0102115