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Mechanisms of population differentiation in seabirds.
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- Author(s): Friesen VL;Friesen VL; Burg TM; McCoy KD
- Source:
Molecular ecology [Mol Ecol] 2007 May; Vol. 16 (9), pp. 1765-85.- Publication Type:
Journal Article; Research Support, Non-U.S. Gov't; Review- Language:
English - Source:
- Additional Information
- Source: Publisher: Blackwell Scientific Publications Country of Publication: England NLM ID: 9214478 Publication Model: Print Cited Medium: Print ISSN: 0962-1083 (Print) Linking ISSN: 09621083 NLM ISO Abbreviation: Mol Ecol Subsets: MEDLINE
- Publication Information: Original Publication: Oxford, UK : Blackwell Scientific Publications, c1992-
- Subject Terms:
- Abstract: Despite recent advances in population genetic theory and empirical research, the extent of genetic differentiation among natural populations of animals remains difficult to predict. We reviewed studies of geographic variation in mitochondrial DNA in seabirds to test the importance of various factors in generating population genetic and phylogeographic structure. The extent of population genetic and phylogeographic structure varies extensively among species. Species fragmented by land or ice invariably exhibit population genetic structure and most also have phylogeographic structure. However, many populations (26 of 37) display genetic structure in the absence of land, suggesting that other barriers to gene flow exist. In these populations, the extent of genetic structure is best explained by nonbreeding distribution: almost all species with two or more population-specific nonbreeding areas (or seasons) have phylogeographic structure, and all species that are resident at or near breeding colonies year-round have population genetic structure. Geographic distance between colonies and foraging range appeared to have a weak influence on the extent of population genetic structure, but little evidence was found for an effect of colony dispersion or population bottlenecks. In two species (Galapagos petrel, Pterodroma phaeopygia, and Xantus's murrelet, Synthliboramphus hypoleucus), population genetic structure, and even phylogeographic structure, exist in the absence of any recognizable physical or nonphysical barrier, suggesting that other selective or behavioural processes such as philopatry may limit gene flow. Retained ancestral variation may be masking barriers to dispersal in some species, especially at high latitudes. Allopatric speciation undoubtedly occurs in this group, but reproductive isolation also appears to have evolved through founder-induced speciation, and there is strong evidence that parapatric and sympatric speciation occur. While many questions remain unanswered, results of the present review should aid conservation efforts by enabling managers to predict the extent of population differentiation in species that have not yet been studied using molecular markers, and, thus, enable the identification of management units and evolutionary significant units for conservation.
- Number of References: 111
- Accession Number: 0 (DNA, Mitochondrial)
- Publication Date: Date Created: 20070421 Date Completed: 20071121 Latest Revision: 20081121
- Publication Date: 20231215
- Accession Number: 10.1111/j.1365-294X.2006.03197.x
- Accession Number: 17444891
- Source:
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