Population genetic differentiation of the hydrothermal vent crab Austinograea alayseae (Crustacea: Bythograeidae) in the Southwest Pacific Ocean

To understand the origin, migration, and distribution of organisms across disjunct deep-sea vent habitats, previous studies have documented the population genetic structures of widely distributed fauna, such as gastropods, bivalves, barnacles, and squat lobsters. However, a limited number of investi...

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Bibliographic Details
Published in:PloS one 2019-04, Vol.14 (4), p.e0215829
Main Authors: Lee, Won-Kyung, Kim, Se-Joo, Hou, Bo Kyeng, Van Dover, Cindy Lee, Ju, Se-Jong
Format: Article
Language:English
Subjects:
Adaptation
Animals
Austinograea alayseae
Barriers
Basins
Biogeography
Bioinformatics
Biological evolution
Biotechnology
Brachyura
Brachyura - genetics
Deep sea
Differentiation
Divergence
DNA barcoding
Electron Transport Complex IV - genetics
Evolution
Gastropods
Gene flow
Gene sequencing
Genes
Genetic aspects
Genetics
Genetics, Population
Genomes
Genomics
Geography
Geological time
Haplotypes - genetics
Hydrothermal plumes
Hydrothermal vent ecosystems
Hydrothermal Vents
Life history
Lobsters
Migration
Mitochondria
Mollusks
Oceans
Pacific Ocean
Phylogenetics
Phylogeny
Polymorphism
Population genetics
Population structure
Population studies
rRNA 16S
Shellfish
Species Specificity
Taxonomy
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Summary:To understand the origin, migration, and distribution of organisms across disjunct deep-sea vent habitats, previous studies have documented the population genetic structures of widely distributed fauna, such as gastropods, bivalves, barnacles, and squat lobsters. However, a limited number of investigations has been conducted in the Southwest Pacific Ocean, and many questions remain. In this study, we determined the population structure of the bythograeid crab Austinograea alayseae from three adjacent vent systems (Manus Basin, North Fiji Basin, and Tonga Arc) in the Southwest Pacific Ocean using the sequences of two mitochondrial genes (COI and 16S rDNA) and one nuclear gene (28S rDNA). Populations were divided into a Manus clade and a North Fiji-Tonga clade, with sequence divergence values in the middle of the barcoding gap for bythograeids. We inferred that hydrographic and/or physical barriers act on the gene flow of A. alayseae between the Manus and North Fiji basins. Austinograea alayseae individuals interact freely between the North Fiji Basin and the Lau Basin (Tonga Arc). Although further studies of genetic differentiation over a geological time scale, life-history attributes, and genome-based population genetics are needed to improve our understanding of the evolutionary history of A. alayseae, our results contribute to elucidating the phylogeny, evolution, and biogeography of bythograeids.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0215829