The spatial scale of genetic subdivision in populations of Ifremeria nautilei, a hydrothermal-vent gastropod from the southwest Pacific
| Autor: | Robert C. Vrijenhoek, Jens Carlsson, Thomas F. Schultz, Andrew David Thaler, Kevin A. Zelnio, Clifford W. Cunningham, Cindy Lee Van Dover, William Saleu |
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| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
0106 biological sciences
Genetic Markers Range (biology) Evolution Population Gastropoda Molecular Sequence Data Structural basin Biology 010603 evolutionary biology 01 natural sciences DNA Mitochondrial 03 medical and health sciences Hydrothermal Vents QH359-425 Animals 14. Life underwater education Ecology Evolution Behavior and Systematics 030304 developmental biology 0303 health sciences education.field_of_study Genetic diversity Pacific Ocean Ecology fungi Genetic Variation Sequence Analysis DNA humanities Genetics Population Habitat Haplotypes Genetic structure Spatial ecology geographic locations Hydrothermal vent Microsatellite Repeats Research Article |
| Zdroj: | BMC Evolutionary Biology, Vol 11, Iss 1, p 372 (2011) BMC Evolutionary Biology |
| ISSN: | 1471-2148 |
| Popis: | Background Deep-sea hydrothermal vents provide patchy, ephemeral habitats for specialized communities of animals that depend on chemoautotrophic primary production. Unlike eastern Pacific hydrothermal vents, where population structure has been studied at large (thousands of kilometres) and small (hundreds of meters) spatial scales, population structure of western Pacific vents has received limited attention. This study addresses the scale at which genetic differentiation occurs among populations of a western Pacific vent-restricted gastropod, Ifremeria nautilei. Results We used mitochondrial and DNA microsatellite markers to infer patterns of gene flow and population subdivision. A nested sampling strategy was employed to compare genetic diversity in discrete patches of Ifremeria nautilei separated by a few meters within a single vent field to distances as great as several thousand kilometres between back-arc basins that encompass the known range of the species. No genetic subdivisions were detected among patches, mounds, or sites within Manus Basin. Although I. nautilei from Lau and North Fiji Basins (~1000 km apart) also exhibited no evidence for genetic subdivision, these populations were genetically distinct from the Manus Basin population. Conclusions An unknown process that restricts contemporary gene flow isolates the Manus Basin population of Ifremeria nautilei from widespread populations that occupy the North Fiji and Lau Basins. A robust understanding of the genetic structure of hydrothermal vent populations at multiple spatial scales defines natural conservation units and can help minimize loss of genetic diversity in situations where human activities are proposed and managed. |
| Databáze: | OpenAIRE |
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