Biophysical and Population Genetic Models Predict the Presence of “Phantom” Stepping Stones Connecting Mid-Atlantic Ridge Vent Ecosystems

Breusing, Corinna; Biastoch, Arne; Drews, Annika; Meta×as, Anna; Jollivet, Didier; Vrijenhoek, Robert C.; Bayer, Till; Melzner, Frank; Sayavedra, Lizbeth; Petersen, Jillian M.; Dubilier, Nicole; Schilhabel, Markus B.; Rosenstiel, Philip; Reusch, Thorsten B. H.

doi:10.1016/j.cub.2016.06.062

Cited by 73 publications

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“…For geographic coordinates, bathymetric depths, and sample sizes see Additional file 1: Table S1. To accurately assess hybridization between B. azoricus and B. puteoserpentis , we used a subset of 18 species-diagnostic markers from a starting panel that included 90 SNPs [28]. Loci were defined as diagnostic, if the two SNP alleles were reciprocally abundant with ≥ 95% in the most distant geographical populations MG ( B. azoricus ) and SM ( B. puteoserpentis ) (Additional file 2: Tables S2 and S3).…”

Section: Methodsmentioning

confidence: 99%

“…MG = Menez Gwen, LS = Lucky Strike, RB = Rainbow, BS = Broken Spur, SP = Snake Pit, IR = Irina, QS = Quest, SM = Semenov. Adapted from [28] with permission from ELSEVIER …”

Section: Introductionmentioning

confidence: 99%

“…Breusing et al [28] designed a panel of single nucleotide polymorphisms (SNPs) to study gene flow across the known ranges of B. azoricus and B. puteoserpentis . For the present study, we used a diagnostic subset of these SNP markers and the mitochondrial ND4 gene (i) to identify the geographical range of hybridization along the MAR axis, (ii) to thoroughly determine different classes of hybrids, and (iii) to find evidence for or against the tension zone model.…”

Section: Introductionmentioning

confidence: 99%

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Widespread introgression in deep-sea hydrothermal vent mussels

2017

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BackgroundThe analysis of hybrid zones is crucial for gaining a mechanistic understanding of the process of speciation and the maintenance of species boundaries. Hybrid zones have been studied intensively in terrestrial and shallow-water ecosystems, but very little is known about their occurrence in deep-sea environments. Here we used diagnostic, single nucleotide polymorphisms in combination with one mitochondrial gene to re-examine prior hypotheses about a contact zone involving deep-sea hydrothermal vent mussels, Bathymodiolus azoricus and B. puteoserpentis, living along the Mid-Atlantic Ridge.ResultsAdmixture was found to be asymmetric with respect to the parental species, while introgression was more widespread geographically than previously recognized. Admixed individuals with a majority of alleles from one of the parental species were most frequent in habitats corresponding to that species. Mussels found at a geographically intermediate vent field constituted a genetically mixed population that showed no evidence for hybrid incompatibilities, a finding that does not support a previously inferred tension zone model.ConclusionsOur analyses indicate that B. azoricus and B. puteoserpentis hybridize introgressively across a large geographic area without evidence for general hybrid incompatibilities. While these findings shed new light onto the genetic structure of this hybrid zone, many aspects about its nature still remain obscure. Our study sets a baseline for further research that should primarily focus on the acquisition of additional mussel samples and environmental data, a detailed exploration of vent areas and hidden populations as well as genomic analyses in both mussel hosts and their bacterial symbionts.Electronic supplementary materialThe online version of this article (doi:10.1186/s12862-016-0862-2) contains supplementary material, which is available to authorized users.

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Section: Methodsmentioning

confidence: 99%

“…MG = Menez Gwen, LS = Lucky Strike, RB = Rainbow, BS = Broken Spur, SP = Snake Pit, IR = Irina, QS = Quest, SM = Semenov. Adapted from [28] with permission from ELSEVIER …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Widespread introgression in deep-sea hydrothermal vent mussels

2017

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“…A high disturbance rate may result in low diversity at individual vents, but it may also result in a mosaic of communities at different stages in succession, thus elevating regional diversity. Alternatively, the spacing of vents, as well as the presence of transform faults and seamounts, can limit dispersal and the potential for recovery from perturbations and may even contribute to extinction of populations at individual vent fields (Turnipseed et al, 2003;Breusing et al, 2016).…”

Section: Vent Communities As Metacommunitiesmentioning

confidence: 99%

“…Bayesian assignment approaches have also recently been utilized to infer population migration rates in alvinocaridid shrimp along the MAR (Teixeira et al, 2012) and western Pacific backarc basins (Thaler et al, 2014), alvinellid polychaetes from the eastern Pacific ridges (Jang et al, 2016), bathymodiolin mussels from the Indo-Pacific (Breusing et al, 2015) and the MAR (Breusing et al, 2016), and lepetodrilid limpets from the Scotia Sea (Roterman et al, 2016). Migration rate estimates are most accurate and precise when true migration rates among populations are moderate (m < 0.333), population structuring is significant, and sampling of individuals and loci is substantial (Faubet et al, 2007;Meirmans, 2014).…”

Section: Genetic Approaches To Metacommunity Dynamics On Ecological Tmentioning

confidence: 99%

Exploring the Ecology of Deep-Sea Hydrothermal Vents in a Metacommunity Framework

et al. 2018

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Species inhabiting deep-sea hydrothermal vents are strongly influenced by the geological setting, as it provides the chemical-rich fluids supporting the food web, creates the patchwork of seafloor habitat, and generates catastrophic disturbances that can eradicate entire communities. The patches of vent habitat host a network of communities (a metacommunity) connected by dispersal of planktonic larvae. The dynamics of the metacommunity are influenced not only by birth rates, death rates and interactions of populations at the local site, but also by regional influences on dispersal from different sites. The connections to other communities provide a mechanism for dynamics at a local site to affect features of the regional biota. In this paper, we explore the challenges and potential benefits of applying metacommunity theory to vent communities, with a particular focus on effects of disturbance. We synthesize field observations to inform models and identify data gaps that need to be addressed to answer key questions including: (1) what is the influence of the magnitude and rate of disturbance on ecological attributes, such as time to extinction or resilience in a metacommunity; (2) what interactions between local and regional processes control species diversity, and (3) which communities are "hot spots" of key ecological significance. We conclude by assessing our ability to evaluate resilience of vent metacommunities to human disturbance (e.g., deep-sea mining). Although the resilience of a few highly disturbed vent systems in the eastern Pacific has been quantified, these values cannot be generalized to remote locales in the western Pacific or mid Atlantic where disturbance rates are different and information on local controls is missing.

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Population Genetics, Genomics and Selective Breeding

2021

Marine Mussels

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Biophysical and Population Genetic Models Predict the Presence of “Phantom” Stepping Stones Connecting Mid-Atlantic Ridge Vent Ecosystems

Cited by 73 publications

References 53 publications

Widespread introgression in deep-sea hydrothermal vent mussels

Widespread introgression in deep-sea hydrothermal vent mussels

Exploring the Ecology of Deep-Sea Hydrothermal Vents in a Metacommunity Framework

Population Genetics, Genomics and Selective Breeding

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