Periodic deep‐sea hydrothermal vent activities observed by hydrophones at Mariana, Okinawa, and Mid‐Atlantic Ridge

1996 ◽  
Vol 100 (4) ◽  
pp. 2639-2639
Author(s):  
Kasahara Junzo ◽  
Sato Toshinori ◽  
Nishizawa Azusa ◽  
Fujioka Kantaro
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Mid Atlantic Ridge

Microbial diversity in deep-sea sediments from the Menez Gwen hydrothermal vent system of the Mid-Atlantic Ridge

2015 ◽  
Vol 24 ◽  
pp. 343-355 ◽  
Author(s):  
Teresa Cerqueira ◽  
Diogo Pinho ◽  
Conceição Egas ◽  
Hugo Froufe ◽  
Bjørn Altermark ◽  
...  
Keyword(s):  
Microbial Diversity ◽  
Deep Sea ◽  
Hydrothermal Vent ◽  
Deep Sea Sediments ◽  
Mid Atlantic Ridge ◽  
Menez Gwen

Ultrastructural characteristics of spermatogenesis in three species of deep-sea hydrothermal vent mytilids

1997 ◽  
Vol 75 (2) ◽  
pp. 308-316 ◽  
Author(s):  
Marcel Le Pennec ◽  
Peter G. Beninger
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
The North ◽  
Male Gametes ◽  
Bathymodiolus Thermophilus ◽  
Nutritional Biology ◽  
Protandric Hermaphroditism ◽  
Mid Atlantic Ridge ◽  
Ultrastructural Characteristics ◽  
Species Specific

To enhance our understanding of the reproductive biology of deep-sea hydrothermal vent mytilids, the histology of the male gonad and the ultrastructure of its gametes were studied in Bathymodiolus thermophilus, B. puteoserpentis, and B. elongatus. Specimens of B. thermophilus were collected at the 13°N site on the East Pacific ridge, while B. puteoserpentis were sampled from the Snake Pit site of the mid-Atlantic ridge and B. elongatus were obtained from the North Fiji Basin. Gonad histology conformed to the typical bivalve profile; the differences in the proportions of acinal and interacinal tissue, as well as differences in acinal fullness in B. puteoserpentis, indicate that gametogenesis is discontinuous in these deep-sea mytilids. Evidence of protandric hermaphroditism was observed in B. elongatus, which exhibited acini containing both maturing and residual male gametes and immature oocytes. The ultrastructural characteristics of the male gametes conform to those described for littoral bivalve species, and the spermatozoon is of the primitive type. No species-specific differences in spermatozoon ultrastructure were discerned. No evidence of bacterial inclusions was found in either the gametes or the associated gonad cells in any of the species examined. The male gametes are thus probably not vectors for the endosymbiotic bacteria that characterize the nutritional biology of the adults in this genus.

scholarly journals Physiological and Genomic Characterization of a Hyperthermophilic Archaeon Archaeoglobus neptunius sp. nov. Isolated From a Deep-Sea Hydrothermal Vent Warrants the Reclassification of the Genus Archaeoglobus

2021 ◽  
Vol 12 ◽  
Author(s):  
Galina Slobodkina ◽  
Maxime Allioux ◽  
Alexander Merkel ◽  
Marie-Anne Cambon-Bonavita ◽  
Karine Alain ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Single Copy ◽  
Amino Acid Identity ◽  
Hyperthermophilic Archaea ◽  
The Novel ◽  
Flagellar Motility ◽  
Isolation And Characterization ◽  
Mid Atlantic Ridge

Hyperthermophilic archaea of the genus Archaeoglobus are the subject of many fundamental and biotechnological researches. Despite their significance, the class Archaeoglobi is currently represented by only eight species obtained as axenic cultures and taxonomically characterized. Here, we report the isolation and characterization of a new species of Archaeoglobus from a deep-sea hydrothermal vent (Mid-Atlantic Ridge, TAG) for which the name Archaeoglobus neptunius sp. nov. is proposed. The type strain is SE56T (=DSM 110954T = VKM B-3474T). The cells of the novel isolate are motile irregular cocci growing at 50–85°C, pH 5.5–7.5, and NaCl concentrations of 1.5–4.5% (w/v). Strain SE56T grows lithoautotrophically with H2 as an electron donor, sulfite or thiosulfate as an electron acceptor, and CO2/HCO3− as a carbon source. It is also capable of chemoorganotrophic growth by reduction of sulfate, sulfite, or thiosulfate. The genome of the new isolate consists of a 2,115,826 bp chromosome with an overall G + C content of 46.0 mol%. The whole-genome annotation confirms the key metabolic features of the novel isolate demonstrated experimentally. Genome contains a complete set of genes involved in CO2 fixation via reductive acetyl-CoA pathway, gluconeogenesis, hydrogen and fatty acids oxidation, sulfate reduction, and flagellar motility. The phylogenomic reconstruction based on 122 conserved single-copy archaeal proteins supported by average nucleotide identity (ANI), average amino acid identity (AAI), and alignment fraction (AF) values, indicates a polyphyletic origin of the species currently included into the genus Archaeoglobus, warranting its reclassification.

scholarly journals Moytirra: Discovery of the first known deep-sea hydrothermal vent field on the slow-spreading Mid-Atlantic Ridge north of the Azores

2013 ◽  
Vol 14 (10) ◽  
pp. 4170-4184 ◽  
Author(s):  
A. J. Wheeler ◽  
B. Murton ◽  
J. Copley ◽  
A. Lim ◽  
J. Carlsson ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Mid Atlantic Ridge ◽  
Slow Spreading ◽  
Hydrothermal Vent Field

scholarly journals ϵ-Proteobacterial diversity from a deep-sea hydrothermal vent on the Mid-Atlantic Ridge

2001 ◽  
Vol 205 (2) ◽  
pp. 329-335 ◽  
Author(s):  
Erwan Corre ◽  
Anna-Louise Reysenbach ◽  
Daniel Prieur
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Mid Atlantic Ridge

scholarly journals Rapid colonisation by nematodes on organic and inorganic substrata deployed at the deep-sea Lucky Strike hydrothermal vent field (Mid-Atlantic Ridge)

2015 ◽  
Vol 45 (3) ◽  
pp. 489-504 ◽  
Author(s):  
Daniela Zeppilli ◽  
Ann Vanreusel ◽  
Florence Pradillon ◽  
Sandra Fuchs ◽  
Perrine Mandon ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Lucky Strike ◽  
Mid Atlantic Ridge ◽  
Hydrothermal Vent Field

Variations in deep-sea hydrothermal vent communities on the Mid-Atlantic Ridge near the Azores plateau

2001 ◽  
Vol 48 (5) ◽  
pp. 1325-1346 ◽  
Author(s):  
D. Desbruyères ◽  
M. Biscoito ◽  
J.-C. Caprais ◽  
A. Colaço ◽  
T. Comtet ◽  
...  
Keyword(s):  
Deep Sea ◽  
Hydrothermal Vent ◽  
Mid Atlantic Ridge
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