Complex genetic patterns and a phylogeographic disjunction among New Zealand mud snails Zeacumantus subcarinatus and Z. lutulentus

Keeney, Devon B.; Szymaniak, Aleksander D.; Poulin, Robert

doi:10.1007/s00227-013-2201-0

Cited by 17 publications

(21 citation statements)

References 72 publications

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“…COI and ITS1 sequence divergences within and among these species in the present study support the presence of four species (Vilas et al 2005) initially identified with 16S and ITS1 (Leung et al 2009b). This pattern is in contrast to the strong levels of genetic structure observed among populations of Zeacumantus species throughout New Zealand (Keeney et al 2013). Given the relatively limited innate dispersal capability of free-living Acanthoparyphium cercariae, which can live 24-36 h outside of a host (Martorelli et al 2006), their dispersal is likely dictated by the vagility of their hosts (Blasco-Costa and .…”

Section: Discussionsupporting

confidence: 84%

“…We recovered all of these species, except species B, outside of this area, with species A and D found in widespread locales. Occasional dispersal of infected snails could also contribute to these geographic patterns as both Zeacumantus species have complex patterns of genetic structure throughout New Zealand, with evidence of occasional long-distance dispersal (Keeney et al 2013). As these species utilize cockles and nereid polychaetes (species B) for second intermediate hosts, and oystercatchers and potentially other shore birds for definitive hosts (Martorelli et al 2006;Leung et al 2009a;Peoples et al 2012), it is likely that their species integrity is maintained over widespread distributions by the movements of bird definitive hosts (Blasco-Costa and .…”

Section: Discussionmentioning

confidence: 99%

“…Echinostomes (Echinostomatidae) are a diverse group of digenetic trematodes characterized by a circumoral head collar consisting of one or two crowns of spines (Kostadinova, 2005). Zeacumantus lutulentus is found on mid-tidal mud flats throughout the North Island and northern portion of the South Island of New Zealand, and can be found co-distributed or upshore from Z. subcarinatus in the same locations (Morton, 2004;Keeney et al 2013). The Acanthoparyphium echinostomes were identified from the Otago region of the South Island of New Zealand and their geographic distribution throughout New Zealand is currently not known.…”

Section: Introductionmentioning

confidence: 99%

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Broad geographic analyses reveal varying patterns of genetic diversity and host specificity among echinostome trematodes in New Zealand snails

2014

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Host specificity is a fundamental component of a parasite's life history. However, accurate assessments of host specificity, and the factors influencing it, can be obscured by parasite cryptic species complexes. We surveyed two congeneric species of intertidal snail intermediate hosts, Zeacumantus subcarinatus and Zeacumantus lutulentus, throughout New Zealand to identify the number of genetically distinct echinostome trematodes infecting them and determine the levels of snail host specificity among echinostomes. Two major echinostome clades were identified: a clade consisting of an unidentified species of the subfamily Himasthlinae and a clade consisting of five species of the genus Acanthoparyphium. All five Acanthoparyphium species were only found in a single snail species, four in Z. subcarinatus and one in Z. lutulentus. In contrast, the Himasthlinae gen. sp. was found in both hosts, but was more prevalent in Z. lutulentus (97 infections) than Z. subcarinatus (10 infections). At least two of the Acanthoparyphium spp. and the Himasthlinae gen. sp. are widespread throughout New Zealand, and can therefore encounter both snail species. Our results suggest that host specificity is determined by host-parasite incompatibilities, not geographic separation, and that it can evolve in different ways in closely related parasite lineages.

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Section: Discussionsupporting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Broad geographic analyses reveal varying patterns of genetic diversity and host specificity among echinostome trematodes in New Zealand snails

2014

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“…The effect of range expansion on demographic expansion was also evident in the other batillariids living around New Zealand, Zeacumantus subcarinatus and Z. lutulentus (Keeney et al. ). These sister snail species also showed sudden demographic increases, but the pattern was apparent only in the area between the islands where marine transgression was evident during the interglacial periods.…”

Section: Discussionmentioning

confidence: 90%

“…As mentioned above, the demographic history of the YS group may illustrate the response of B. attramentaria to habitat range and thermal condition following the last marine transgression since the LGM. The effect of range expansion on demographic expansion was also evident in the other batillariids living around New Zealand, Zeacumantus subcarinatus and Z. lutulentus (Keeney et al 2013). These sister snail species also showed sudden demographic increases, but the pattern was apparent only in the area between the islands where marine transgression was evident during the interglacial periods.…”

Section: Postglacial Demographic Expansion Of B Attramentariamentioning

confidence: 84%

Postglacial range shift and demographic expansion of the marine intertidal snail Batillaria attramentaria

Kwan

Kim

et al. 2014

Ecology and Evolution

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To address the impacts of past climate changes, particularly since the last glacial period, on the history of the distribution and demography of marine species, we investigated the evolutionary and demographic responses of the intertidal batillariid gastropod, Batillaria attramentaria, to these changes, using the snail as a model species in the northwest Pacific. We applied phylogeographic and divergence population genetic approaches to mitochondrial COI sequences from B. attramentaria. To cover much of its distributional range, 197 individuals collected throughout Korea and 507 publically available sequences (mostly from Japan) were used. Finally, a Bayesian skyline plot (BSP) method was applied to reconstruct the demographic history of this species. We found four differentiated geographic groups around Korea, confirming the presence of two distinct, geographically subdivided haplogroups on the Japanese coastlines along the bifurcated routes of the warm Tsushima and Kuroshio Currents. These two haplogroups were estimated to have begun to split approximately 400,000 years ago. Population divergence analysis supported the hypothesis that the Yellow Sea was populated by a northward range expansion of a small fraction of founders that split from a southern ancestral population since the last glacial maximum (LGM: 26,000–19,000 years ago), when the southern area became re-submerged. BSP analyses on six geographically and genetically defined groups in Korea and Japan consistently demonstrated that each group has exponentially increased approximately since the LGM. This study resolved the phylogeography of B. attramentaria as a series of events connected over space and time; while paleoceanographic conditions determining the connectivity of neighboring seas in East Asia are responsible for the vicariance of this species, the postglacial sea-level rise and warming temperatures have played a crucial role in rapid range shifts and broad demographic expansions of its populations.

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Geographic concordance of genetic barriers in New Zealand coastal marine species

Arranz

Fewster

Lavery

2021

Aquatic Conservation

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Comparative phylogeography is recognized as a powerful tool to discern common patterns of connectivity across species, information that can be crucial in assisting the design of protected area networks. Previously, qualitative analyses have been undertaken in New Zealand waters in order to find concordance in marine dispersal barriers. This study presents the first attempt to quantitatively measure the congruence in genetic divergence breaks among 21 New Zealand marine coastal invertebrates, while accounting for the effects of variable sampling scale, life history traits and marker type. Previously recognized phylogeographic barriers to dispersal were found to be significant across species, such as the North–South Island differentiation and a northern genetic break at Cape Reinga. Low‐dispersal species exhibited additional locations of common significant divergence. Some of the differences in genetic barriers observed among species may be more related to the habitat type of the species (intertidal zone or subtidal) and the marker type used in the study (mitochondrial DNA or microsatellites), than to the dispersal traits of the species (high or low dispersal). Despite some limitations, the approach implemented here has significant advantages and permits the use of data from a wide variety of studies. This study provides the first quantitative insight into community‐wide genetic barriers within New Zealand's coastal marine ecosystem and provides directions for future investigations of this type in other regions.

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Complex genetic patterns and a phylogeographic disjunction among New Zealand mud snails Zeacumantus subcarinatus and Z. lutulentus

Cited by 17 publications

References 72 publications

Broad geographic analyses reveal varying patterns of genetic diversity and host specificity among echinostome trematodes in New Zealand snails

Broad geographic analyses reveal varying patterns of genetic diversity and host specificity among echinostome trematodes in New Zealand snails

Postglacial range shift and demographic expansion of the marine intertidal snail Batillaria attramentaria

Geographic concordance of genetic barriers in New Zealand coastal marine species

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