Genetic differentiation between spatially-disjunct populations of the deep-sea, hydrothermal vent-endemic amphipod Ventiella sulfuris

Hessler, Robert R.; Vrijenhoek, R. C.

doi:10.1007/bf00357252

Cited by 68 publications

(54 citation statements)

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“…My findings were consistent with the structure associated with these features, specifically among populations of polychaetes and bivalves across the RFZ ) and other vestimentiferans and a common vent endemic amphipod (France et al 1992) across the Galápagos Triple Junction. Additional Riftia samples will be needed from the southern EPR in order to consider the remaining three potential genetic barriers using microsatellite loci.…”

Section: Consistency With Previous Vent Population Genetic Patternssupporting

confidence: 79%

“…‡, not reported. References: (1) France et al 1992; (2) ; (3) Black et al 1998; (4) Craddock et al 1995b; (5) (6) Karl et al 1996; (7) (8) Jollivet et al 1995a(9) Marsh et al 2001(10) Riftia has separate sexes (Jones 1980), with a nearly equal ratio of males to females (Thiébaut et al 2002), and is highly fecund (Cary et al 1989); up to 700,000 mature eggs have been observed in Riftia's ovisac (Young 2003). Eggs are small, yolky, lipid-rich (Cary et al 1989), and near-neutrally buoyant .…”

Section: Target Species: Life History and General Biologymentioning

confidence: 99%

“…Given the topographically influenced hydrodynamic mechanisms inferred for the ridge axis, larval retention may well be promoted at vents; this remains a fertile area for research (Ridge2000 2008 Program Review). Judging from recent and historical genetic studies (including France et al 1992, Jollivet et al 1995, Won et al 2003, Matabos et al 2008, five bathymetric or hydrographic features (discussed below) are potentially important to vent population genetic structure in the eastern Pacific (Reid 1997), capable of transporting pelagic larvae from southern vents along the ridge to those north of the fracture. However, this current could also prevent northern originating larvae from dispersing to vents to the southeast.…”

Section: Proposed Genetic Barriers Structuring Eastern Pacific Hydrotmentioning

confidence: 99%

“…Two species that occur on either side of the RFZ, the tubeworm Oasisia alvinae and amphipod Ventiella sulfuris, have also been demonstrated to exhibit restricted gene flow across this region (France et al 1992 (McLean 1989;Warén & Bouchet 1989. The RFZ marks the northern extent for Tevnia jerichonana tubeworms (Black et al 1998), Bathymodiolus thermophilus mussels (Grassle 1985, Van Dover 2000, Won et al 2003, and Branchipolynoe symmytilida scaleworms ).…”

Section: Observed Genetic Patterns Across Two Ridge Featuresmentioning

confidence: 99%

“…The Galápagos Rift Triple Junction and Hess Deep are associated with limited dispersal between the GAR and EPR not only in B. symmytilida, and potentially B. thermophilus (Grassle 1985, though not according to Won et al 2003), but also in Calyptogena magnifica (Hurtado et al 2003), V. sulfuris (France et al 1992), and…”

Section: Observed Genetic Patterns Across Two Ridge Featuresmentioning

confidence: 99%

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Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galapagos Rift

Fusaro¹

2008

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Ecological processes at deep-sea hydrothermal vents on fast-spreading mid-ocean ridges are punctuated by frequent physical disturbance. Larval dispersal among disjunct vent sites facilitates the persistence of sessile invertebrate species in these geologically and chemically dynamic habitats despite local extinction events. Regional population extension and rapid recolonization by the siboglinid tubeworm Riftia pachyptila have been well documented along the East Pacific Rise and the Galápagos Rift. To analyze spatial and temporal population genetic patterns and the processes governing them at ephemeral and disjunct habitats, a suite of 12 highly variable microsatellite DNA markers were developed for this species. Eight of these loci were used to assess the regional and within-ridge genetic structure of recent colonists and resident adults collected from nine sites in the eastern Pacific Ocean over period of three to seven years. A significant seafloor eruption during the seven-year sampling period allowed investigation into the role of local extinction in population genetic diversity at the Tica vent site at 9˚N EPR, while collections within two and five years of an eruption that created the Rosebud vent field at 86˚W GAR provided insights into genetic diversity input over population establishment.For the first time, this thesis demonstrated significant genetic differences between Riftia populations on the East Pacific Rise and Galápagos Rift. Moreover, the separate treatment of colonist and resident subpopulations revealed a high potential for local larval retention at vent sites. This mechanism for recruitment likely sustains disjunct populations and supports the recolonization of locally extinct areas after disturbance events, while episodic long-distance dispersal maintains genetic coherence of the species. Temporal population genetic consideration at the Tica site on the East Pacific Rise suggests that the 2005-2006 seafloor eruption had little to no discernable effect on local population genetic composition. Yet local populations appear to exhibit a small degree of 3 genetic patchiness, with a high degree of relatedness (half-sibs) among subsets of individuals within both colonist and resident cohorts. This thesis broadens the application of recently developed molecular techniques to study the effect of ridge-crest processes and offers new perspectives into marine dispersal, gene flow, and population differentiation.Thesis Supervisor:

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Section: Consistency With Previous Vent Population Genetic Patternssupporting

confidence: 79%

Section: Target Species: Life History and General Biologymentioning

confidence: 99%

Section: Proposed Genetic Barriers Structuring Eastern Pacific Hydrotmentioning

confidence: 99%

Section: Observed Genetic Patterns Across Two Ridge Featuresmentioning

confidence: 99%

Section: Observed Genetic Patterns Across Two Ridge Featuresmentioning

confidence: 99%

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Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galapagos Rift

Fusaro¹

2008

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Ecology of Cold Seep Habitats

Nanajкar

Desai

et al. 2022

Systems Biogeochemistry of Major Marine Biomes

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Hatchling Size and Aspects of Biology in the Deep‐Sea Amphipod Genus Eurythenes (Crustacea: Amphipoda)

Thurston

Bett

1995

Intl Review of Hydrobiology

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Records attributed to Eurythenes gryllus are discussed in the light of described morphological variation, and the existence of a third species in the genus is postulated. The presence of five pairs of oostegites in E. gryllus, a character almost unique among the Amphipoda, is confirmed. Brooding females of E. gryllus and E. obesus, captured in deep midwater hauls in the eastern North Atlantic Ocean, are reported for the first time. The 120 mm E. gryllus female carried 237 hatchlings (mean length 11.13 mm) and the 48 mm E. obesus female 47 hatchlings (mean length 7.99 mm). Hatchlings showed variability in size and bodily proportion, and measurements of individual body segments could not be used to predict overall length. Despite this variability, no evidence for more than one instar was found. The hatchlings of E. gryllus are established as a hitherto unrecognized instar in this species. Egg size for E. gryllus and E. obesus is predicted. The biological consequences of the absolute and relative size of hatchling in the two species, and the depths of capture of the E. gryllus female, are discussed.

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Genetic differentiation between spatially-disjunct populations of the deep-sea, hydrothermal vent-endemic amphipod Ventiella sulfuris

Cited by 68 publications

References 50 publications

Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galapagos Rift

Spatial and temporal population genetics at deep-sea hydrothermal vents along the East Pacific Rise and Galapagos Rift

Ecology of Cold Seep Habitats

Hatchling Size and Aspects of Biology in the Deep‐Sea Amphipod Genus Eurythenes (Crustacea: Amphipoda)

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