scholarly journals Vacuolate-attached filaments: highly productive Ridgeia piscesae epibionts at the Juan de Fuca hydrothermal vents

2009 ◽  
Vol 157 (4) ◽  
pp. 791-800 ◽  
Author(s):  
Karen M. Kalanetra ◽  
Douglas C. Nelson
Keyword(s):  
Hydrothermal Vents ◽  
Ridgeia Piscesae ◽  
Juan De Fuca

Revision of the species of Ridgeia from northeast Pacific hydrothermal vents, with a redescription of Ridgeia piscesae Jones (Pogonophora: Obturata = Vestimentifera)

1995 ◽  
Vol 73 (2) ◽  
pp. 282-295 ◽  
Author(s):  
Eve C. Southward ◽  
Verena Tunnicliffe ◽  
Michael Black
Keyword(s):  
Hydrothermal Vents ◽  
Juan De Fuca Ridge ◽  
Morphological Data ◽  
Transform Fault ◽  
Ridgeia Piscesae ◽  
Northeast Pacific ◽  
Juan De Fuca ◽  
Gorda Ridge ◽  
Distance Data ◽  
Animal Size

Examination of vestimentiferan worms attributed to the genus Ridgeia from more than 50 vent sites in the northeast Pacific indicates that only one species is present. We amalgamate Ridgeia piscesae Jones and R. phaeophiale Jones under the name R. piscesae and include other forms previously suspected to be different species. Allozyme evidence supports the hypothesis that the populations belong to a highly plastic phenotype. The distance data indicate no substantial genetic differences among populations along Juan de Fuca Ridge and across a transform fault to the northern Gorda Ridge. Morphological data indicate that the original distinction of two species on the basis of obturacular saucer number and tube colour was based on the extremes of a continuum of characteristics that relate to animal size, levels of predation, and probably vent fluid conditions. The intriguing effect of habitat on phenotype in this abundant vent animal requires further investigation now that the taxonomy is better understood.

Hydrothermal vents on an axis seamount of the Juan de Fuca ridge

Nature ◽  
1985 ◽  
Vol 313 (5999) ◽  
pp. 212-214 ◽  
Author(s):  
Canadian American Seamount Expediti
Keyword(s):  
Hydrothermal Vents ◽  
Juan De Fuca Ridge ◽  
Fuca Ridge ◽  
Juan De Fuca

scholarly journals Growth and longevity of the tubeworm Ridgeia piscesae in the variable diffuse flow habitats of the Juan de Fuca Ridge

2007 ◽  
Vol 344 ◽  
pp. 143-157 ◽  
Author(s):  
IA Urcuyo ◽  
DC Bergquist ◽  
IR MacDonald ◽  
M VanHorn ◽  
CR Fisher
Keyword(s):  
Juan De Fuca Ridge ◽  
Ridgeia Piscesae ◽  
Diffuse Flow ◽  
Fuca Ridge ◽  
Juan De Fuca

Biological colonization of new hydrothermal vents following an eruption on Juan de Fuca Ridge

1997 ◽  
Vol 44 (9-10) ◽  
pp. 1627-1644 ◽  
Author(s):  
Verena Tunnicliffe ◽  
Robert W. Embley ◽  
James F. Holden ◽  
David A. Butterfield ◽  
Gary J. Massoth ◽  
...  
Keyword(s):  
Hydrothermal Vents ◽  
Juan De Fuca Ridge ◽  
Fuca Ridge ◽  
Juan De Fuca

scholarly journals A new species and phylogenetic insights in Hesiospina (Annelida, Hesionidae) 

Zootaxa ◽  
2018 ◽  
Vol 4441 (1) ◽  
pp. 59 ◽  
Author(s):  
PAULO BONIFÁCIO ◽  
YANN LELIÈVRE ◽  
EMMANUELLE OMNES
Keyword(s):  
New Species ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Juan De Fuca Ridge ◽  
Cold Seeps ◽  
Molecular Analyses ◽  
The Third ◽  
Juan De Fuca ◽  
Ne Pacific ◽  
A New Species

Hesionids are a very speciose group of polychaetes. In the deep sea, they occur in different environments such as hydrothermal vents, cold seeps, abyssal depths or whale falls. In the present study, a new species of Hesionidae, Hesiospina legendrei sp. nov. has been identified based on morphological and molecular (16S and COI genes) data from hydrothermal vents located in Juan de Fuca Ridge (NE Pacific Ocean). This new species is characterized by trapezoid prostomium; proboscis with high number of distal papillae (20–27), a pair of sac-like structures inserted ventro-laterally in proboscis; notopodia lobe reduced with multiple, slender aciculae on segments 1–5; and neuropodia developed with single, simple chaeta, and numerous, heterogomph falcigers, with 1–2 inferiormost having elongated hood. Hesiospina legendrei sp. nov. is the third described species in the genus. Sequences from the two previously described Hesiospina species are included in the molecular analyses, and although the genes used in this study are not sufficient to resolve the relationships on genus level, the result raises questions about the cosmopolitan aspect of H. vestimentifera. 

scholarly journals Isolation of Tellurite- and Selenite-Resistant Bacteria from Hydrothermal Vents of the Juan de Fuca Ridge in the Pacific Ocean

2002 ◽  
Vol 68 (9) ◽  
pp. 4613-4622 ◽  
Author(s):  
Christopher Rathgeber ◽  
Natalia Yurkova ◽  
Erko Stackebrandt ◽  
J. Thomas Beatty ◽  
Vladimir Yurkov
Keyword(s):  
Hydrothermal Vents ◽  
Deep Ocean ◽  
Juan De Fuca Ridge ◽  
Resistant Bacteria ◽  
Ocean Water ◽  
Bacterial Films ◽  
The Pacific ◽  
Juan De Fuca ◽  
The Pacific Ocean ◽  
Reducing Bacteria

ABSTRACT Deep-ocean hydrothermal-vent environments are rich in heavy metals and metalloids and present excellent sites for the isolation of metal-resistant microorganisms. Both metalloid-oxide-resistant and metalloid-oxide-reducing bacteria were found. Tellurite- and selenite-reducing strains were isolated in high numbers from ocean water near hydrothermal vents, bacterial films, and sulfide-rich rocks. Growth of these isolates in media containing K2TeO3 or Na2SeO3 resulted in the accumulation of metallic tellurium or selenium. The MIC of K2TeO3 ranged from 1,500 to greater than 2,500 μg/ml, and the MIC of Na2SeO3 ranged from 6,000 to greater than 7,000 μg/ml for 10 strains. Phylogenetic analysis of 4 of these 10 strains revealed that they form a branch closely related to members of the genus Pseudoalteromonas, within the γ-3 subclass of the Proteobacteria. All 10 strains were found to be salt tolerant, pH tolerant, and thermotolerant. The metalloid resistance and morphological, physiological, and phylogenetic characteristics of newly isolated strains are described.

Size- and sex-based habitat partitioning by Lepetodrilus fucensis near hydrothermal vents on the Juan de Fuca Ridge, Northeast Pacific

2008 ◽  
Vol 65 (11) ◽  
pp. 2332-2341 ◽  
Author(s):  
Amanda E. Bates
Keyword(s):  
Hydrothermal Vents ◽  
Size Structure ◽  
Environmental Gradients ◽  
Cost Of Reproduction ◽  
Juan De Fuca Ridge ◽  
Habitat Partitioning ◽  
Northeast Pacific ◽  
Juan De Fuca ◽  
One Year ◽  
Size Gradient

This study examines habitat partitioning by a hydrothermal vent limpet, Lepetodrilus fucensis, along environmental gradients and among vents with differing levels of flux. To test for spatial patterns in size structure, two distances from isolated vent flows were sampled (0–25 cm and 51–75 cm). Lepetodrilus fucensis displays a size gradient: juveniles are rare in flow (relative abundance < 5%, density = 56 ± 46 individuals·dm–2) and abundant peripherally (>95%, 2616 ± 2002 individuals·dm–2). Next, sex-based habitat partitioning was examined. High flux locations are female-biased (proportion male = 0.34 ± 0.07), whereas males are overrepresented peripherally and at waning vents (0.64 ± 0.08). The spatial mismatch between the sexes within a vent is driven by differential habitat occupation at decimetre scales. One hypothesis to explain this pattern is that females suffer a higher cost of reproduction and outcompete males for habitats with high food availability. Indeed, relatively higher percentages of females in waning vents had empty gonads in comparison with males (32%–78% vs. 0%–16%, respectively). Furthermore, females transplanted to the vent periphery for one year displayed much lower survivorship than males (2% vs. 27%). This finding suggests that differential survivorship between the sexes when food is limited can yield male-biased populations at waning vents.

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