Composition of a One-Year-Old <i>Riftia pachyptila</i> Community Following a Clearance Experiment: Insight to Succession Patterns at Deep-Sea Hydrothermal Vents

Govenar, Breea; Freeman, M.; Bergquist, Derk C.; Johnson, Galen A.; Fisher, Charles R.

doi:10.2307/1543204

Cited by 33 publications

(37 citation statements)

References 20 publications

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“…6). These same basic taxa dominate the grazer, detritivore and predator feeding guilds of many different vent communities in the eastern Pacific (Govenar et al 2002(Govenar et al , 2004, suggesting that this is a widespread and robust food web structure in these environments.…”

Section: Resultsmentioning

confidence: 99%

Using stable isotopes and quantitative community characteristics to determine a local hydrothermal vent food web

Bergquist¹,

Eckner

Urcuyo³

et al. 2007

Mar. Ecol. Prog. Ser.

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To investigate food web structure in diffuse flow vent environments, an entire macrofaunal community associated with a single aggregation of the tubeworm Ridgeia piscesae was collected from a vent field on the Juan de Fuca Ridge in the NE Pacific. All members of the community were identified and enumerated, and the biomass and stable carbon (δ 13 C) and nitrogen (δ 15 N) isotope ratios were determined for almost all taxa. Symbiont-bearing invertebrates (primarily R. piscesae) accounted for a vast majority of the biomass of the community, and 3 presumably grazing bacterivorous gastropods dominated the biomass of the consumer fauna. Biomass and abundance of individuals declined from the bacterivore to the scavenger/detritivore to the predator feeding guild. Several species (a folliculinid ciliate, Idas washingtonia, Provanna variabilis) possessed unique stable isotope signatures, suggesting the possibility of symbiotic relationships with autotrophic bacteria. Stable isotope values varied widely between and occasionally within species in the lowest consumer levels suggesting a great diversity of food source 13 C and 15 N composition. Based on the distinct isotopic values of 3 bacterivores, 3 potential pools of isotopically-distinct microbial production were identified. The 4 highest-biomass predatory species (all polynoids) possessed δ 13 C and δ 15 N values consistent with a diet that included the tubeworm R. piscesae, a species comprising 83% of the total biomass in the collection, and the gastropod Depressigyra globulus, a species comprising 10% of the total biomass in the collection. A potential specialist predator (Clypeosectus curvus) on folliculinid ciliates was also identified. Overall the study suggested a dominant pattern of energy transfer from microbial producers to symbiont-bearing siboglinid tubeworms, various bacterivores (gastropods, polychaetes and pycnogonids), and detritivorous polychaetes to predaceous polynoids.

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Section: Resultsmentioning

confidence: 99%

Using stable isotopes and quantitative community characteristics to determine a local hydrothermal vent food web

Bergquist¹,

Eckner

Urcuyo³

et al. 2007

Mar. Ecol. Prog. Ser.

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“…Once established, tube growth rates may exceed 85 to 160 cm/yr , Thiébaut et al 2002. While large worms may only inhabit one to two thirds of their total tube length (Govenar et al 2004), Riftia is still considered one of the fastest growing organisms on Earth, out-competing or over-growing the smaller tubeworm species,…”

Section: Target Species: Life History and General Biologymentioning

confidence: 99%

“…Natural and experimental colonization observations have been unable to determine the biotic or abiotic cue for Riftia settlement , Mullineaux et al 2000. As colonization occurs within a year or two of newly available habitat, it is considered likely that a pool of larvae is maintained in the water column above vents , Govenar et al 2004. Recruitment lacks periodicity and is discontinuous, but settlement events can be frequent (e.g., 8 to 20 d) (Thiébaut et al 2002).…”

Section: Biological Model Riftia Pachyptilamentioning

confidence: 99%

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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“…Some annelid species endemic to chemosynthetic ecosystems have been collected from the aggregations of vestimentiferans (Govenar et al, 2005;Govenar & Fisher, 2007;Tsurumi & Tunnicliffe, 2003;Govenar et al, 2004). Species of the family Phyllodocidae have also been recorded from the aggregations of vestimentiferans in the western and eastern Pacific (Desbruyères et al, 2006;Martin & Britayev, 1998): Eulalia papillosa (Blake, 1985); Garapagomystides aristata Blake, 1985; Protomystides hatsushimaensis Miura, 1988; Protomystides verenae Blake & Hilbig, 1990; and an unidentified species of the genus Protomystides inhabiting Gulf of Mexico (Becker, 2010).…”

Section: Introductionmentioning

confidence: 99%

First record of Protomystides hatsushimaensis (Annelida: Phyllodocidae) inhabiting vacant tubes of vestimentiferan tubeworms

Kobayashi

Kojima

2017

Mar Biodivers Rec

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Background: Vestimentiferan tubeworms (Annelida: Siboglinidae) often play an important role as a foundation species in chemosynthetic ecosystems by providing microhabitats for other organisms. In the present study, we detected a new relationship between phyllodocid worms and tubes of a vestimentiferan Alaysia sp. Methods: Tubes of Alaysia sp. were collected from a hydrothermal vent field at a depth of 1052 m on the North Iheya Knoll in the Okinawa Trough on January 17, 2000. The Alaysia tubes were fixed with 4.7% neutralized formaldehyde solution and preserved in 70% ethyl alcohol. Phyllodocid worms were later obtained from empty tubes of Alaysia sp. Results: We classified the collected phyllodocid worms as Protomystides hatsushimaensis based on the morphology of specialized chaetae. They were observed in thin brownish tubes of mucous, probably secreted by P. hatsushimaensis, at approximately 30 and 50 mm from the upper openings of the tubes of Alaysia sp. Conclusions: The phyllodocid worm P. hatsushimaensis was found inside the tubes of Alaysia sp., a vestimentiferan tubeworm, collected in a hydrothermal vent field on the North Iheya Knoll in the Okinawa Trough of the western Pacific. The present study provides a new record of P. hatsushimaensis using empty vestimentiferan tubes as a microhabitat.

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Composition of a One-Year-Old Riftia pachyptila Community Following a Clearance Experiment: Insight to Succession Patterns at Deep-Sea Hydrothermal Vents

Cited by 33 publications

References 20 publications

Using stable isotopes and quantitative community characteristics to determine a local hydrothermal vent food web

Using stable isotopes and quantitative community characteristics to determine a local hydrothermal vent food web

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

First record of Protomystides hatsushimaensis (Annelida: Phyllodocidae) inhabiting vacant tubes of vestimentiferan tubeworms

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