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- W3137800199 startingPage "4670" @default.
- W3137800199 abstract "Many Northeast (NE) Pacific fishes and invertebrates survived Pleistocene glaciations in northern refugia, but the extent that kelps survived in northern areas is uncertain. Here, we test the hypothesis that populations of sugar kelp (Saccharina latissima) persisted in the Gulf of Alaska during ice-age maxima when the western margin of the Cordilleran ice sheet covered coastal areas around the NE Pacific Ocean. We estimated genetic diversities within and phylogeographical relationships among 14 populations along 2,800 km in the NE Pacific and Bering Sea with partial sequences of mitochondrial DNA 5′-cytochrome oxidase subunit I (COI, bp = 624, n = 543), chloroplast DNA ribulose-1,5-bisphosphate carboxylase large subunit-3′ (rbcL, bp = 735, n = 514), and 11 microsatellite loci. Concatenated sequences of rbcL and COI showed moderate levels of within-population genetic diversity (mean h = 0.200) but substantial differences among populations (ΦST = 0.834, p < .0001). Microsatellites showed moderate levels of heterozygosity within populations (mean HE = 0.391). Kelps in the same organellar lineage tended to cluster together, regardless of geographic origins, as indicated in a principal coordinate analysis (PCoA) of microsatellite genotypes. The PCoA also showed evidence of nuclear hybridizations between co-occurring organellar lineages. Individual admixture plots with population clusters of K = 2, 6, and 9 showed increasing complexity with considerable historical admixture between some clusters. A time-calibrated phylogeny placed divergences between rbcL-COI lineages at 1.4 million years at most. The time frames of mutation in the rbcL-COI lineages and microsatellite population clusters differed among locations. The existence of ancient lineages in the Gulf of Alaska, moderate levels of genetic diversity, and the absence of departures from neutrality are consistent with northern refugia during multiple Croll-Milankovitch climate cycles in the Pleistocene Epoch." @default.
- W3137800199 created "2021-03-29" @default.
- W3137800199 creator A5028789721 @default.
- W3137800199 creator A5070665118 @default.
- W3137800199 date "2021-03-19" @default.
- W3137800199 modified "2023-09-27" @default.
- W3137800199 title "Phylogeography of sugar kelp: Northern ice‐age refugia in the Gulf of Alaska" @default.
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- W3137800199 doi "https://doi.org/10.1002/ece3.7368" @default.
- W3137800199 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8093666" @default.
- W3137800199 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33976839" @default.