Phylogeography of Littorina sitkana in the northwestern Pacific Ocean: evidence of eastward trans-Pacific colonization after the Last Glacial Maximum

Azuma, Noriko; Zaslavskaya, N. I.; Yamazaki, Tomoyasu; Nobetsu, Takahiro; Chiba, Susumu

doi:10.1007/s10709-017-9952-3

Cited by 9 publications

(19 citation statements)

References 36 publications

(42 reference statements)

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“…8). Consistent with previous studies of L. sitkana (Kyle & Boulding 2000;Lee & Boulding 2009;Marko et al, 2010;Azuma et al 2017), we found very little genetic diversity and no significant population subdivision at all four loci in the NEP, an unexpected pattern for a species that lacks planktonic larvae, but one that is readily explained by a recent range expansion. The consistency of the pattern across loci allows us to rule out the possibility of a mtDNA selective sweep in the NEP, or other hypotheses about natural selection acting directly or indirectly on the genetic markers themselves.…”

Section: Discussionsupporting

confidence: 91%

“…Our study provides strong support for Azuma et al's (2017) hypothesis that Littorina sitkana recently colonized the northeastern Pacific (NEP) from the northwestern Pacific (NWP). The primary evidence for this conclusion is the extremely recent divergence times among all populations within the NEP and between all NEP populations and some populations in the NWP on Sakhalin Island and the Kamchatka Peninsula.…”

Section: Discussionsupporting

confidence: 76%

“…Among NEP species with spatial patterns of genetic diversity that are consistent with recent range expansions, several have geographic ranges extending to the northwestern Pacific (NWP) (e.g., Vermeij et al 1990), leaving open the question that populations in Asia may have served as a glacial refugium for NEP populations of amphi-Pacific taxa (Vermeij 1989). For one such species, the Sitka Periwinkle Littorina sitkana (Philippi 1846), population genetic sub-structuring is nearly non-existent in the NEP (Kyle & Boulding 2000;Sokolova & Boulding 2004;Lee & Boulding 2009;Marko et al 2010;Botta et al 2014), but much greater over relatively small spatial scales in the NWP (Nohara 1999;Zaslavskaya & Pudovkin 2005;Azuma et al 2017). Based on these contrasting patterns of diversity and the observation that the most common mtDNA haplotype in the NEP is identical to one found in the NWP, Azuma et al (2017) proposed that NEP populations of L. sitkana must have been derived from the NWP following the end of the last glacial.…”

Section: Introductionmentioning

confidence: 99%

“…For one such species, the Sitka Periwinkle Littorina sitkana (Philippi 1846), population genetic sub-structuring is nearly non-existent in the NEP (Kyle & Boulding 2000;Sokolova & Boulding 2004;Lee & Boulding 2009;Marko et al 2010;Botta et al 2014), but much greater over relatively small spatial scales in the NWP (Nohara 1999;Zaslavskaya & Pudovkin 2005;Azuma et al 2017). Based on these contrasting patterns of diversity and the observation that the most common mtDNA haplotype in the NEP is identical to one found in the NWP, Azuma et al (2017) proposed that NEP populations of L. sitkana must have been derived from the NWP following the end of the last glacial. Here, we use multi-locus sequence data set to test this hypothesis and to estimate the divergence time of NEP and NWP populations of L. sitkana.…”

Section: Introductionmentioning

confidence: 99%

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Peer Review #1 of "Geographic origin and timing of colonization of the Pacific Coast of North America by the rocky shore gastropod Littorina sitkana (v0.1)"

Johannesson¹

2019

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The demographic history of a species can have a lasting impact on its contemporary population genetic structure. Northeastern Pacific (NEP) populations of the rocky shore gastropod Littorina sitkana have very little mitochondrial DNA (mtDNA) sequence diversity and show no significant population structure despite lacking dispersive planktonic larvae. A contrasting pattern of high mtDNA diversity in the northwestern Pacific (NWP) suggests that L. sitkana may have recently colonized the NEP from the NWP via stepping-stone colonization through the Aleutian-Commander Archipelago (ACA) following the end of the last glacial 20,000 years ago. Here, we use multi-locus sequence data to test that hypothesis using a combination of descriptive statistics and population divergence modeling aimed at resolving the timing and the geographic origin of NEP populations. Our results show that NEP populations share a common ancestor with a population of L. sitkana on the Kamchatka Peninsula ~46,900 years ago and that NEP populations diverged from each other ~21,400 years ago. A more recent population divergence between Kamchatka and NEP populations, than between Kamchatka and other populations in the NWP, suggests that the ACA was the most probable dispersal route. Taking into account the confidence intervals for the estimates, we conservatively estimate that L. sitkanaarrived in the NEP between 107,400 and 4,100 years ago, a range of dates that is compatible with post-glacial colonization of the NEP. Unlike other congeners that are relatively abundant in the Pleistocene fossil record of the NEP, only one report of L. sitkana exists from the NEP fossil record. Although broadly consistent with the molecular data, the biogeographic significance of these fossils is difficult to evaluate, as the shells cannot be distinguished from the closely-related congener L. subrotundata.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 76%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Peer Review #1 of "Geographic origin and timing of colonization of the Pacific Coast of North America by the rocky shore gastropod Littorina sitkana (v0.1)"

Johannesson¹

2019

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“…Another possible explanation for the disagreement between the fossil evidence and genetic divergences is that the calibration presented here accurately dates the timing of the split of the sampled lineages, but that the mitochondrial lineage arising from the trans-Bering interchange has not been sampled. Perhaps more importantly, there is evidence of high extinction rates in Northern Pacific and Atlantic molluscs (Stanley 1986a(Stanley , 1986bVermeij 1989aVermeij , 1989b, and in some cases, local extinctions were followed by secondary colonization events (e.g., Palumbi and Kessing 1991;Azuma et al 2017). Therefore, it is possible that the lineage involved in the trans-Bering migration during the Pliocene became extinct and that modern populations of this species derive from a more recent dispersal event.…”

Section: Divergence Times For Northern Marine Invertebratesmentioning

confidence: 99%

Recalibrating the molecular clock for Arctic marine invertebrates based on DNA barcodes

Loeza-Quintana

Carr

Khan

et al. 2019

Genome

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Divergence times for species assemblages of Arctic marine invertebrates have often been estimated using a standard rate (1.4%/MY) of molecular evolution calibrated using a single sister pair of tropical crustaceans. Because rates of molecular evolution vary among taxa and environments, it is essential to obtain clock calibrations from northern lineages. The recurrent opening and closure of the Bering Strait provide an exceptional opportunity for clock calibration. Here, we apply the iterative calibration approach to investigate patterns of molecular divergence among lineages of northern marine molluscs and arthropods using publicly available sequences of the cytochrome c oxidase subunit I (COI) gene and compare these results with previous estimates of trans-Bering divergences for echinoderms and polychaetes. The wide range of Kimura two-parameter (K2P) divergences among 73 trans-Bering sister pairs (0.12%–16.89%) supports multiple pulses of migration through the Strait. Overall, the results indicate a rate of K2P divergence of 3.2%/MY in molluscs, 5%–5.2%/MY in arthropods, and 3.5%–4.7%/MY in polychaetes. While these rates are considerably higher than the often-adopted 1.4%/MY rate, they are similar to calibrations (3%–5%/MY) in several other studies of marine invertebrates. This upward revision in rates means there is a need both to reevaluate the evolutionary history of marine lineages and to reexamine the impact of prior climatic changes upon the diversification of marine life.

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A revision of the genus Littorina (Mollusca: Gastropoda) in Korea

Lee

Choe

Kern

et al. 2018

Animal Cells and Systems

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Littorina Férussac, 1822 is an abundant genus of small gastropods found in the upper littoral zone of rocky seashores worldwide. Although ecologically important, shell-based species identification in this genus is challenging due to phenotypic variation in shell morphology and lack of diagnostic characters among morphologically similar species. In this study, we revised the taxonomy of Korean Littorina species using morphological characters (shell and radula) and cox1 mitochondrial DNA sequences for three Korean species: L. brevicula, L. sitkana, and L. horikawai. Results suggest that L. sitkana was erroneously reported as L. kasatka in a previous study. A new record for Littorina horikawai (Matsubayashi & Habe in Habe, 1979), previously unknown from Korea, is described, which can be distinguished from L. sitkana by the presence of alternating white and brown spiral ribs on each whorl. Comparison of the mtDNA cox1 gene sequences shows very low intraspecific variation even between geographically distant populations. A phylogenetic tree supports a close relationship between L. horikawai and L. sitkana, consistent with earlier phylogenetic studies.

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Phylogeography of Littorina sitkana in the northwestern Pacific Ocean: evidence of eastward trans-Pacific colonization after the Last Glacial Maximum

Cited by 9 publications

References 36 publications

Peer Review #1 of "Geographic origin and timing of colonization of the Pacific Coast of North America by the rocky shore gastropod Littorina sitkana (v0.1)"

Peer Review #1 of "Geographic origin and timing of colonization of the Pacific Coast of North America by the rocky shore gastropod Littorina sitkana (v0.1)"

Recalibrating the molecular clock for Arctic marine invertebrates based on DNA barcodes

A revision of the genus Littorina (Mollusca: Gastropoda) in Korea

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