Consulta: subjectFacets:"Mid-Atlantic Ridge"
Registros recuperados: 62
Data/hora: 13/06/2024 15:55:31

Two deep-living rhodaliids (Cnidaria, Siphonophora) from the Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Mapstone, Gillian M.; Corbari, Laure; Menot, Lenaick.
Rhodaliids are a semi-benthic family of 14 physonect siphonophore species found in all oceans, except the Mediterranean and Arctic. They inhabit species-specific depth ranges in isolated locations and records are mostly sparse. Here, the first ever observations of rhodaliids from the Mid-Atlantic Ridge are given, from three images of two putative species. They come from depths of 3482 and 3667–3670 metres, on the Mid-Atlantic Ridge (MAR) at 23°N and 26°N, near two hydrothermal vents. Rhodaliids are very delicate animals and extremely hard to sample, particularly from such great depths, and the only comparable deep-living species so far described is the Galapagos Dandelion (Thermopalia taraxaca) from 2480–2938 metres on the Galapagos Rift and East Pacific...
Tipo: Text
Palavras-chave: Deep-sea; Mid-Atlantic Ridge; Rhodaliid; Siphonophore.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00361/47207/51395.pdf

Estimating Symbiont Abundances and Gill Surface Areas in Specimens of the Hydrothermal Vent Mussel Bathymodiolus puteoserpentis Maintained in Pressure Vessels
Provedor de dados: 5
Autores: Duperron, Sebastien; Quiles, Adrien; Szafranski, Kamil M.; Leger, Nelly; Shillito, Bruce.
The hydrothermal vent mussel Bathymodiolus puteoserpentis hosts gill-associated sulfur- and methane-oxidizing bacteria which sustain host nutrition and allow it to reach high densities at various sites along the northern Mid-Atlantic Ridge. Previous studies have demonstrated that in similar dual symbioses, relative abundances of each bacterial type could change following variations in symbiont substrate availabilities. In this study, pressurized recovery and incubations in pressure vessels were used to test whether B. puteoserpentis symbionts displayed similar behavior in the presence of symbiont substrates. The relative abundances of both types of symbionts were analyzed using fluorescence in situ hybridization (FISH) and group-specific gene copy numbers...
Tipo: Text
Palavras-chave: Symbiosis; In vivo experiments; Pressurized recovery; Bivalve; Mid-Atlantic Ridge.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00484/59533/62525.pdf

Sorosite (eta-Cu6Sn5)-bearing native tin and lead assemblage from the Mir zone (Mid-Atlantic Ridge, 26 degrees N)
Provedor de dados: 5
Autores: Dekov, Vm; Damyanov, Zk; Kamenov, Gd; Bonev, Ik; Rajta, I; Grime, Gw.
A number of small, irregular-shaped and spherical shiny metallic particles have been found in the sediments from the Mir zone, Trans-Atlantic Geotraverse hydrothermal held (Mid-Atlantic Ridge, 26 degreesN). The phase variety of the particles examined is represented by metallic tin: tin-rich lead, and tin-copper phases. A detailed mineralogical study of these particles was carried out using optical microscopy, nuclear microscopy, scanning electron microscopy, electron microprobe, proton microprobe and X-ray diffraction analysis. Tin-lead grains have the typical eutectic microtexture of the metal components. Tin-copper grains are formed from single crystals of sorosite, eta -Cu6Sn5. The Sn-Pb-Cu complex grains are composed of fine stannoan lead...
Tipo: Text
Palavras-chave: Zone hydrothermale; Dorsale médio-Atlantique; Étain et plomb natifs; Sorosite; Hydrothermal field; Mid-Atlantic Ridge; Native Sn and Pb; Sorosite.
Ano: 2001
URL: http://archimer.ifremer.fr/doc/00322/43350/42876.pdf

Hydrothermal faunal assemblages and habitat characterisation at the Eiffel Tower edifice (Lucky Strike, Mid-Atlantic Ridge)
Provedor de dados: 5
Autores: Cuvelier, Daphne; Sarradin, Pierre-marie; Sarrazin, Jozee; Colaco, Ana; Copley, Jon T.; Desbruyeres, Daniel; Glover, Adrian G.; Santos, Ricardo Serrao; Tyler, Paul A.
The Eiffel Tower edifice is situated in the Lucky Strike hydrothermal vent field at a mean depth of 1690 m on the Mid-Atlantic Ridge (MAR). At this 11-m-high hydrothermal structure, different faunal assemblages, varying in visibly dominant species (mussels and shrimp), in mussel size and in density of mussel coverage, were sampled biologically and chemically. Temperature and sulphide (Sigma S) were measured on the different types of mussel-based assemblages and on a shrimp-dominated assemblage. Temperature was used as a proxy for calculating total concentrations of CH4. Based on the physico-chemical measurements, two microhabitats were identified, corresponding to (i) a more variable habitat featuring the greatest fluctuations in environmental variables...
Tipo: Text
Palavras-chave: Faunal assemblage; Hydrothermal vent; Microhabitat; Mid-Atlantic Ridge; Physico-chemical characterisation.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00035/14648/13996.pdf

Fossil clams from a serpentinite-hosted sedimented vent field near the active smoker complex Rainbow, MAR, 36 degrees 13 ' N: Insight into the biogeography of vent fauna
Provedor de dados: 5
Autores: Lartaud, Franck; De Rafelis, Marc; Oliver, Graham; Krylova, Elena; Dyment, Jerome; Ildefonse, Benoit; Thibaud, Remy; Gente, Pascal; Hoise, Eva; Meistertzheim, Anne-leila; Fouquet, Yves; Gaill, Francoise; Le Bris, Nadine.
Hydrothermal circulation at ultramafic-hosted sites supports a large variety of high-and low-temperature hydrothermal vents and associated ecosystems. The discovery of abundant fossil vesicomyid and thyasirid shell accumulations at the ridge crest, approximately 2.5 km east of the active Rainbow vent field on the Mid-Atlantic Ridge (MAR, 36 degrees 13'N), increased our knowledge regarding the diversity of vent communities at slow spreading ridges. Bivalve molluscs of the family Vesicomyidae were represented by the genus Phreagena. Here we present the first record of this genus in the Atlantic Ocean. This second vesicomyid species known from the MAR, Phreagena sp., was found to be associated with a Thyasira species that is affiliated with T. southwardae (at...
Tipo: Text
Palavras-chave: Ultramafic-hosted; Mid-Atlantic Ridge; Bivalve shells; Vesicomyidae; Thyasiridae; Carbon and oxygen isotopes.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00012/12301/9093.pdf

Iridium GPS 2 data from the EMSO-Azores observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between Jannuary 2011 and december 2011 using the Iridium/GPS modem 2 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41457

Buoy management unit 2 data from the EMSO-Azores observatory, 2013-2014
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between September 2013 and February 2014 (n=332) by the buoy management unit 2, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/39759

Buoy management unit 2 data from the EMSO-Azores observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between Jannuary 2011 and December 2011 by the buoy management unit 2, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41462

Food-web complexity across hydrothermal vents on the Azores triple junction
Provedor de dados: 5
Autores: Portail, Marie; Brandily, Christophe; Cathalot, Cecile; Colaco, Ana; Gelinas, Yves; Husson, Berengere; Sarradin, Pierre-marie; Sarrazin, Jozee.
The assessment and comparison of food webs across various hydrothermal vent sites can enhance our understanding of ecological processes involved in the structure and function of biodiversity. The Menez Gwen, Lucky Strike and Rainbow vent fields are located on the Azores triple junction of the Mid-Atlantic Ridge. These fields have distinct depths (from 850 to 2320 m) and geological contexts (basaltic and ultramafic), but share similar faunal assemblages defined by the presence of foundation species that include Bathymodiolus azoricus, alvinocarid shrimp and gastropods. We compared the food webs of 13 faunal assemblages at these three sites using carbon and nitrogen stable isotope analyses (SIA). Results showed that photosynthesis-derived organic matter is a...
Tipo: Text
Palavras-chave: Mid-Atlantic Ridge; Hydrothermal vents; Food webs; Stable isotopes; Functional traits.
Ano: 2018
URL: http://archimer.ifremer.fr/doc/00414/52551/53732.pdf

COSTOF, technical data from SeaMoN West, node of the EMSO-Azores observatory, 2013-2014
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between September 2013 and February 2014 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN West, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/39764

High-resolution dynamics of a deep-sea Hydrothermal mussel assemblage monitored by the EMSO-Açores MoMAR observatory
Provedor de dados: 5
Autores: Sarrazin, Jozee; Cuvelier, Daphne; Peton, Loic; Legendre, P.; Sarradin, Pierre-marie.
Although the spatial distribution of hydrothermal vent assemblages in relation to environmental conditions has been assessed in several studies, there is little documented data on the temporal variation of the fauna and corresponding abiotic factors in a vent community. Here, we present one of the longest integrated (faunal and environmental data) time series ever obtained in a hydrothermal ecosystem. The data were acquired using the TEMPO ecological module that was deployed between 2006 and 2008 on the Mid-Atlantic Ridge, providing the first insights into the day-to-day variations in a Bathymodiolus azoricus mussel assemblage from the Lucky Strike vent field for the 48 days during which the video camera operated. The time-series yielded additional...
Tipo: Text
Palavras-chave: Hydrothermal vents; Faunal dynamics; Mid-Atlantic Ridge; Deep-sea observatory; Bathymodiolus azoricus mussel assemblages; Sulphide edifices; Environmental conditions.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00189/30023/28508.pdf

Meiofauna Community in Soft Sediments at TAG and Snake Pit Hydrothermal Vent Fields
Provedor de dados: 5
Autores: Spedicato, Adriana; Sánchez, Nuria; Pastor, Lucie; Menot, Lenaick; Zeppilli, Daniela.
The risk assessment of seafloor massive sulfide (SMS) mining on meiobenthic organisms, specifically on soft-sediment meiofauna, is impeded by a lack of knowledge on the biology and ecology of these communities. In this study, we investigated sediment samples taken in proximity of active vents at Trans-Atlantic Geotraverse (TAG) and Snake Pit, two hydrothermal vent fields of the Mid-Atlantic Ridge, in order to explore metazoan meiofauna, particularly nematode community, and its relation to organic carbon, total nitrogen, total sulfur, and dissolved oxygen. Organic carbon and nitrogen contents were low at both sites. High concentrations of total sulfur and low oxygen penetration were found at Snake Pit compared to TAG. Snake Pit showed approximately four...
Tipo: Text
Palavras-chave: Meiobenthos; Nematoda; Mid-Atlantic Ridge; Seafloor massive sulfides; Biodiversity.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00629/74061/73507.pdf

COSTOF, technical data from SeaMoN East, node of the EMSO-Azores observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between Jannuary 2011 and December 2011 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN East, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41459

Community dynamics over a decadal scale at Logatchev, 14 degrees 45 ' N, Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Gebruk, Andrey; Fabri, Marie-claire; Briand, Patrick; Desbruyeres, Daniel.
Hydrothermal vent community dynamics over a ten year span was studied in the Logatchev area, 14 degrees 45'N on the Mid-Atlantic Ridge. On the SERPENTINE cruise in March 2007 with the RN Pourquoi pas? and the ROV Victor 6000 (IFREMER), composition, abundance and distribution of dominant megafauna at Logatchev were examined and compared to published data from 1997. Our results revealed notable changes in several community characteristics. The most significant changes evident in March 2007 compared to July 1997 were the increase up to by order of magnitude in the population density of predatory gastropods Phymorchynchus spp. at the site Irina-2 and disappearance of a live population of vesicomyids at the site Anya's Garden. Other notable differences between...
Tipo: Text
Palavras-chave: Hydrothermal vent; Community dynamics; Succession; Phymorchynchus; Bathymodiolus puteoserpentis; Vesicomyids; Logatchev; Mid-Atlantic Ridge.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00019/13044/10156.pdf

Iridium GPS 2 data from the EMSO-Azores observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between October 2010 and december 2010 using the Iridium/GPS modem 2 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41839

Recent population expansion and connectivity in the hydrothermal shrimp Rimicaris exoculata along the Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Teixeira, Sara; Cambon-bonavita, Marie-anne; Serrao, Ester A.; Desbruyeres, Daniel; Arnaud-haond, Sophie.
Aim Deep-sea hydrothermal vents are unstable habitats that are both spatially and temporally fragmented. In vent species, a 'short-term insurance' hypothesis would lead us to expect mostly self-recruitment, limiting the loss of larvae in the deep ocean or water column and increasing genetic differentiation over the time elapsed since colonization. Alternatively, a 'long-term insurance' hypothesis would support the prediction of selection for large-scale dispersal, to ensure long-term persistence in these ephemeral habitats. The main goal of this study was to infer the spatial and temporal distribution of genetic diversity of the shrimp Rimicaris exoculata, which forms high-density local populations on hydrothermal vents along the Mid-Atlantic ridge....
Tipo: Text
Palavras-chave: Bottleneck; Deep-sea biogeography; Dispersal; Genetic diversity; Hydrothermal vents; Marine biogeography; Mid-Atlantic Ridge; Rimicaris exoculata; Spatio-temporal distribution.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00033/14394/12350.pdf

Iridium GPS 2 data from the EMSO-Azores observatory, 2013-2014
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between September 2013 and February 2014 (n=332) using the Iridium/GPS modem 2 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/39765

Meteorological data from the EMSO-Azores seafloor observatory, 2014-2015
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the meteorological parameters (mean wind speed, temperature in °C and atmospheric pressure in mbar) acquired between July 2014 and April 2015 using the Furuno Rowind+, mounted at the top of BOREL superstructure (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Hydrothermal Vents; Lucky Strike; TEMPO; Time-series; Environmental monitoring node; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41309

First insights into macro-and meiofaunal colonisation patterns on paired wood/slate substrata at Atlantic deep-sea hydrothermal vents
Provedor de dados: 5
Autores: Cuvelier, Daphne; Beesau, Julie; Ivanenko, Viatcheslav; Zeppilli, Daniela; Sarradin, Pierre-marie; Sarrazin, Jozee.
In 2006, paired wood and slate panels, each equipped with a temperature probe, were deployed on three different localities on and around the Eiffel Tower edifice (Lucky Strike vent field, Mid-Atlantic Ridge) within close proximity of visible hydrothermal activity. Recovery of these panels took place in 2008. For this two-year deployment period, the composition of colonising organisms (both macro-and meiofauna) was assessed, along with image analyses of the deployment sites in 2006 and 2008. Very few significant differences in colonisation between organic (wood) and inorganic (slate) panels were revealed. Rather, the locality of deployment and the local environmental conditions and hydrothermal activity were found to influence taxonomic composition....
Tipo: Text
Palavras-chave: Colonisation; Organic and inorganic substrata; Mid-Atlantic Ridge; Hydrothermal; Recruitment; Diversity; Temperature.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00180/29090/27505.pdf

Buoy management unit 1 data from the EMSO-Azores observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between October 2010 and December 2010 by the buoy management unit 1, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41843

Iridium GPS 1 data from the EMSO-Azores observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between Jannuary 2011 and december 2011 using the Iridium/GPS modem 1 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41456

Export of deep-sea hydrothermal particles, indigenous thermophilic microorganisms and larvae to the surrounding Ocean
Provedor de dados: 5
Autores: Lesongeur, Francoise; Briand, Patrick; Godfroy, Anne; Crassous, Philippe; Byrne, Nathalie; Khripounoff, Alexis.
To assess the production and the export of particulate and biological material in deep-sea hydrothermal vents, four moorings with sediment traps and current meters were deployed for 24 days in the Azores Triple Junction (ATJ) region. They were deployed along an axis starting at the base of a hydrothermal vent chimney and ending 1000 m away. The particles sampled at the base of the chimney were characterized by high concentrations in total sulfur (16%) and iron (4%). The particle composition changed drastically with distance from the vent: the sulfur concentration decreased with an increase in clay components. Thermophilic microorganisms were successfully enriched from all the particle samples. Cultured strains were closely related to hydrothermal species,...
Tipo: Text
Palavras-chave: Deep-sea hydrothermal vents; Particle flux; Hydrothermal microorganisms; Larvae; Regional index: North Atlantic; Mid-Atlantic Ridge; Azores Triple Junction.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00230/34111/33046.pdf

Currents and topography drive assemblage distribution on an active hydrothermal edifice
Provedor de dados: 5
Autores: Girard, Fanny; Sarrazin, Jozee; Arnaubec, Aurelien; Cannat, Mathilde; Sarradin, Pierre-marie; Wheeler, Benjamin; Matabos, Marjolaine.
The deep sea is characterized by a wide range of landscapes, including complex features where topography and currents interact to form highly heterogeneous habitats. In addition to a complex topography, hydrothermal vent environments are characterized by strong environmental gradients that structure the spatial distribution of biological communities. The role of vent fluid temperature and chemical composition on species distribution is now well understood, but investigations on the effects of the complex sulfide edifice topography are scarce. Here, we used a novel approach combining 3D photogrammetric reconstruction, in situ environmental measurements and modeling to characterize assemblage distribution on the active edifice Eiffel Tower (Lucky Strike,...
Tipo: Text
Palavras-chave: Mid-Atlantic Ridge; Eiffel Tower; EMSO-Azores; Ecology; Imagery; 3D photogrammetry; Deep-sea observatories; Topographic effects.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00640/75211/75349.pdf

Behavioural study of two Hydrothermal crustacean decapods: Mirocaris fortunata and Segonzacia mesatlantica, from the lucky strike vent field (mid-Atlantic ridge)
Provedor de dados: 5
Autores: Matabos, Marjolaine; Cuvelier, D.; Brouard, J.; Shillito, B.; Ravaux, J.; Zbinden, M.; Barthelemy, D.; Sarradin, Pierre-marie; Sarrazin, Jozee.
Identifying the factors driving community dynamics in hydrothermal vent communities, and in particular biological interactions, is challenged by our ability to make direct observations and the difficulty to conduct experiments in those remote ecosystems. As a result, we have very limited knowledge on species’ behaviour and interactions in these communities and how they in turn influence community dynamics. Interactions such as competition or predation significantly affect community structure in vent communities, and video time-series have successfully been used to gain insights in biological interactions and species behaviour, including responses to short-term changes in temperature or feeding strategies. In this study, we combined in situ and ex situ...
Tipo: Text
Palavras-chave: Abyss Box; Biological interactions; Deep-sea observatory; Eiffel Tower edifice; Feeding behaviour; Experimental research; Video imagery; Time series; Lucky Strike; Mid-Atlantic Ridge; 37 degrees 17 ' N; 32 degrees 16.3 ' W.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00266/37714/35732.pdf

Iridium GPS 1 data from the EMSO-Azores observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between Jannuary 2012 and december 2013 using the Iridium/GPS modem 1 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41342

Constraints on the shallow velocity structure of the Lucky Strike Volcano, Mid-Atlantic Ridge, from downward continued multichannel streamer data
Provedor de dados: 5
Autores: Arnulf, A. F.; Harding, A. J.; Kent, G. M.; Singh, Shubpreet; Crawford, W. C.
The shallow velocity structure of the Lucky Strike segment of the Mid-Atlantic Ridge is investigated using seismic refraction and reflection techniques applied to downward continued multichannel streamer data. We present a three-dimensional velocity model beneath the Lucky Strike Volcano with unprecedented spatial resolutions of a few hundred meters. These new constraints reveal large lateral variations in P wave velocity structure beneath this feature. Throughout the study area, uppermost crustal velocities are significantly lower than those inferred from lower resolution ocean bottom seismometer studies, with the lowest values (1.8–2.2 km/s) found beneath the three central volcanic cones. Within the central volcano, distinct shallow units are mapped that...
Tipo: Text
Palavras-chave: Mid-Atlantic Ridge; Lucky Strike; Seismic refraction; Tomography; Oceanic crust; Downward continuation.
Ano: 2014
URL: http://archimer.ifremer.fr/doc/00185/29598/27965.pdf

Iridium GPS 2 data from the EMSO-Azores observatory, 2014-2015
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between July 2014 and April 2015 using the Iridium/GPS modem 2 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41308

Buoy management unit 1 data from the EMSO-Azores observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between Jannuary 2011 and December 2011 by the buoy management unit 1, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41461

Comparison of microbial communities associated with three Atlantic ultramafic hydrothermal systems
Provedor de dados: 5
Autores: Roussel, Erwan; Konn, Cecile; Charlou, Jean-luc; Donval, Jean-pierre; Fouquet, Yves; Querellou, Joel; Prieur, Daniel; Cambon-bonavita, Marie-anne.
The distribution of Archaea and methanogenic, methanotrophic and sulfate-reducing communities in three Atlantic ultramafic-hosted hydrothermal systems (Rainbow, Ashadze, Lost City) was compared using 16S rRNA gene and functional gene (mcrA, pmoA and dsrA) clone libraries. The overall archaeal community was diverse and heterogeneously distributed between the hydrothermal sites and the types of samples analyzed (seawater, hydrothermal fluid, chimney and sediment). The Lost City hydrothermal field, characterized by high alkaline warm fluids (pH&gt;11; T&lt;95 °C), harbored a singular archaeal diversity mostly composed of unaffiliated Methanosarcinales. The archaeal communities associated with the recently discovered Ashadze 1 site, one of the deepest active...
Tipo: Text
Palavras-chave: Archaea; Hydrothermal vent; Mid-Atlantic Ridge; 16S rRNA gene; Sediment; Ultramafic.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00067/17836/15573.pdf

The hydrothermal vent community of a new deep-sea field, Ashadze-1, 12°58'N on the Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Fabri, Marie-claire; Bargain, Annaelle; Briand, Patrick; Gebruk, A.; Fouquet, Yves; Morineaux, Marie; Desbruyeres, Daniel.
Ashadze-1 (128 580N 448 510W, 4080 m) on the Mid-Atlantic Ridge (MAR) is the deepest known ctive hydrothermal vent ield. The first observations on this site were numerous clear and black smokers and surprisingly few nown symbiotic species ominant in other vent areas on the MAR. The species most abundant at Ashadze-1 are those usually ound at the periphery f hydrothermal communities: sea-anemones Maractis rimicarivora and chaetopterid polychaetes hyllochaetopterus sp. ov. This study comprised site mapping and faunal sampling and Ashadze-1 was completely mapped y using the Remote perated Vehicle ‘Victor 6000’ and a new high resolution tool available for deep-sea research. A photo-mapping survey was carried out with a long range optical black and white...
Tipo: Text
Palavras-chave: Hydrothermal vent; Mid-Atlantic Ridge; Maractis rimicarivora; Isotopes.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00004/11565/11356.pdf

Buoy management unit 1 data from the EMSO-Azores observatory, 2014-2015
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between July 2014 and April 2015 by the buoy management unit 1, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41311

Buoy management unit 1 data from the EMSO-Azores observatory, 2013-2014
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between September 2013 and February 2014 (n=332) by the buoy management unit 1, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/39755

Iridium GPS 1 data from the EMSO-Azores observatory, 2014-2015
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between July 2014 and April 2015 using the Iridium/GPS modem 1 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41307

Meteorological data from the EMSO-Azores seafloor observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the meteorological parameters (mean wind speed, temperature in °C and atmospheric pressure in mbar) acquired between Jannuary 2011 and December 2011 (n=332) using the Furuno Rowind+, mounted at the top of BOREL superstructure (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41458

Buoy management unit 2 data from the EMSO-Azores observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between Jannuary 2012 and December 2012 by the buoy management unit 2, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41349

A new species of Phyllochaetopterus (Annelida: Chaetopteridae) from deep-sea hydrothermal Ashadze-1 vent field, Mid-Atlantic Ridge: taxonomical description and partial COI DNA sequence
Provedor de dados: 5
Autores: Morineaux, Marie; Nishi, Eijiroh; Ormos, Andrea; Mouchel, Olivier.
Phyllochaetopterus polus, a new species of the polychaete family Chaetopteridae is described. Specimens were collected at the Ashadze-1 vent field (Mid-Atlantic Ridge), from 4100-4200 m depth. P polus is the first chaetopterid reported from the Atlantic hydrothermal vents. Three chaetopterid species have been recorded from deep-sea hydrothermal vents belonging to two genera, Spiochaetopterus and Phyllochaetopterus. P polus sp. nov. is a medium-sized chaetopterid, characterized by 9 chaetigers in region A and 2 in region B; region C is usually incomplete in the specimens examined, but has at least 40-70 chaetigers. This polychaete has one pair of modified chaetae in chaetiger 4 with a pear-shaped obliquely truncated head, triangular uncini and a branched...
Tipo: Text
Palavras-chave: Polychaeta; Hydrothermal vent; Mid-Atlantic Ridge; Taxonomy; New species; COI.
Ano: 2010
URL: http://archimer.ifremer.fr/doc/00013/12439/9250.pdf

Iridium GPS 1 data from the EMSO-Azores observatory, 2013-2014
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between September 2013 and February 2014 (n=332) using the Iridium/GPS modem 1 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/39766

Dispersion of deep-sea hydrothermal vent effluents and larvae by submesoscale and tidal currents
Provedor de dados: 5
Autores: Vic, Clement; Gula, Jonathan; Roullet, Guillaume; Pradillon, Florence.
Deep-sea hydrothermal vents provide sources of geochemical materials that impact the global ocean heat and chemical budgets, and support complex biological communities. Vent effluents and larvae are dispersed and transported long distances by deep ocean currents, but these currents are largely undersampled and little is known about their variability. Submesoscale (0.1–10 km) currents are known to play an important role for the dispersion of biogeochemical materials in the ocean surface layer, but their impact for the dispersion in the deep ocean is unknown. Here, we use a series of nested regional oceanic numerical simulations with increasing resolution (from δx=6km to δx=0.75km) to investigate the structure and variability of highly-resolved deep currents...
Tipo: Text
Palavras-chave: Submesoscales; Tides; Hydrothermal vent; Lagrangian dispersion; Lucky Strike; Mid-Atlantic Ridge; Connectivity; Bathymodiolus.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00419/53001/53949.pdf

Buoy management unit 1 data from the EMSO-Azores observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between Jannuary 2012 and December 2012 by the buoy management unit 1, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41347

Iridium GPS 1 data from the EMSO-Azores observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between October 2010 and december 2010 using the Iridium/GPS modem 1 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41838

COSTOF, technical data from SeaMoN West, node of the EMSO-Azores observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between Jannuary 2012 and December 2012 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN West, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41345

COSTOF, technical data from SeaMoN West, node of the EMSO-Azores observatory, 2014-2015
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between July 2014 and April 2015 by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN West, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41310

COSTOF, technical data from SeaMoN East, node of the EMSO-Azores observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between October 2010 and December 2010 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN East, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41842

Buoy management unit 2 data from the EMSO-Azores observatory, 2014-2015
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between July 2014 and April 2015 by the buoy management unit 2, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41312

Buoy management unit 2 data from the EMSO-Azores observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, internal pressure in mbar, water intrusion detection, tilt in °) acquired between October 2010 and December 2010 by the buoy management unit 2, which is the Electronic core of BOREL, the transmission buoy of the EMSO-Azores observatory (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Buoy; Time-series; Transmission; MoMAR; BOREL.
Ano: 2015
URL: http://dx.doi.org/10.17882/41844

Rimicaris exoculata: biology and ecology of a shrimp from deep-sea hydrothermal vents associated with ectosymbiotic bacteria
Provedor de dados: 5
Autores: Zbinden, M; Cambon-bonavita, Marie-anne.
Rimicaris exoculata, the ‘blind shrimp,’ is the most abundant species living on active hydrothermal edifices at deep-sea vents of the Mid-Atlantic Ridge. Its unusually enlarged branchial chamber houses a dense ectosymbiotic community of chemoautotrophic bacteria. Long debated, shrimp nutrition has been proven to be a kind of osmotrophy, whereby small organic molecules produced by the symbionts pass through the integument of the shrimp directly into the circulatory system, rather than through the digestive system. The broad phylogenetic and metabolic diversity of this epibiotic community suggests a highly flexible and adjustable microbial consortium, adapted to the chemically contrasting environments inhabited by the shrimp. To cope with the highly...
Tipo: Text
Palavras-chave: Alvinocaridid shrimp; Chemoautotrophic symbiont; Deep-sea; Epibiosis; Holobiont; Hydrothermal vents; Mid-Atlantic Ridge; Rimicaris exoculata.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00655/76681/77812.pdf

COSTOF, technical data from SeaMoN West, node of the EMSO-Azores observatory, 2011-2012
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between Jannuary 2011 and December 2011 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN West, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41460

Rapid colonisation by nematodes on organic and inorganic substrata deployed at the deep-sea Lucky Strike hydrothermal vent field (Mid-Atlantic Ridge)
Provedor de dados: 5
Autores: Zeppilli, Daniela; Vanreusel, Ann; Pradillon, Florence; Fuchs, Sandra; Mandon, Perrine; James, Tristan; Sarrazin, Jozee.
Despite the fragmented nature of hydrothermal vent (HV) fields, nascent vent sites are rapidly colonized by a pool of regional species. While succession of large animals at vents is relatively well established, we lack information on the associated meiofauna, in particular, on nematodes. The aim of the present study is to investigate the process of colonisation after 9 months of organic (wood and bone) and inorganic (slate) substrata by nematode assemblages deployed at the Eiffel Tower hydrothermal edifice on the Lucky Strike vent field on the Mid-Atlantic Ridge (MAR), at varying distances from visible hydrothermal activity. Abundance, biomass and diversity of colonising nematodes were compared with the results from an earlier similar two-year experiment....
Tipo: Text
Palavras-chave: Nematodes; Colonization substrata; Wood; Bone; Slate; Mid-Atlantic Ridge; Hydrothermal vents.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00278/38939/37520.pdf

COSTOF, technical data from SeaMoN East, node of the EMSO-Azores observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between Jannuary 2012 and December 2012 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN East, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41346

Biological data extraction from imagery - How far can we go? A case study from the Mid-Atlantic Ridge
Provedor de dados: 5
Autores: Cuvelier, Daphne; De Busserolles, Fanny; Lavaud, Romain; Floc'H, Estelle; Fabri, Marie-claire; Sarradin, Pierre-marie; Sarrazin, Jozee.
In the past few decades, hydrothermal vent research has progressed immensely, resulting in higher-quality samples and long-term studies. With time, scientists are becoming more aware of the impacts of sampling on the faunal communities and are looking for less invasive ways to investigate the vent ecosystems. In this perspective, imagery analysis plays a very important role. With this study, we test which factors can be quantitatively and accurately assessed based on imagery, through comparison with faunal sampling. Twelve instrumented chains were deployed on the Atlantic Eiffel Tower hydrothermal edifice and the corresponding study sites were subsequently sampled. Discrete, quantitative samples were compared to the imagery recorded during the experiment....
Tipo: Text
Palavras-chave: Hydrothermal vents; Image analyses; Deep ocean; Taxonomic diversity; Mid-Atlantic Ridge; Data processing; Benthic ecology.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00117/22868/21643.pdf

Population structure and recruitment in mytilid bivalves from the Lucky Strike and Menez Gwen hydrothermal vent fields (37°17'N and 37°50'N on the Mid-Atlantic Ridge)
Provedor de dados: 5
Autores: Comtet, Thierry; Desbruyeres, Daniel.
Population structure and recruitment pattern of undescribed mytilid bivalves that dominate the animal communities associated with vents of the Lucky Strike and Menez Gwen hydrothermal vent fields (37 degrees 17' N and 37 degrees 50' N on the Mid-Atlantic Ridge) were studied from size-frequency analyses. Intra-site comparisons reveal that length-frequency distributions differ significantly from one location to the other. This spatial segregation of the sizes could be due to spatio-temporal variability in environmental conditions and to intraspecific competition processes, especially adult-larval interactions (competition for space and food resources, intraspecific larviphagy) that could prevent larvae from settling on surfaces covered by adults. A modal...
Tipo: Text
Palavras-chave: Hydrothermal vents; Mytilidae; Recruitment; Population structure; Size frequency; Spatial segregation; Intraspecific competition; Mid-Atlantic Ridge.
Ano: 1998
URL: https://archimer.ifremer.fr/doc/00446/55799/62521.pdf

Hydrothermal activity along the slow-spreading Lucky Strike ridge segment (Mid-Atlantic Ridge): Distribution, heatflux, and geological controls
Provedor de dados: 5
Autores: Escartin, J.; Barreyre, T.; Cannat, M.; Garcia, R.; Gracias, N.; Deschamps, A.; Salocchi, A.; Sarradin, Pierre-marie; Ballu, V.
We have reviewed available visual information from the seafloor, and recently acquired microbathymetry for several traverses across the Lucky Strike segment, to evaluate the distribution of hydrothermal activity. We have identified a new on-axis site with diffuse flow, Ewan, and an active vent structure ∼1.2 km from the axis, Capelinhos. These sites are minor relative to the Main field, and our total heatflux estimate for all active sites (200–1200 MW) is only slightly higher than previously published estimates. We also identify fossil sites W of the main Lucky Strike field. A circular feature ∼200 m in diameter located on the flanks of a rifted off-axis central volcano is likely a large and inactive hydrothermal edifice, named Grunnus. We find no...
Tipo: Text
Palavras-chave: Hydrothermalism; Mid-ocean ridge; Heat flux; Faulting; Oceanic crust; Mid-Atlantic Ridge.
Ano: 2015
URL: http://archimer.ifremer.fr/doc/00281/39241/37812.pdf

Meteorological data from the EMSO-Azores seafloor observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the meteorological parameters (mean wind speed, temperature in °C and atmospheric pressure in mbar) acquired between Jannuary 2012 and December 2013 (n=332) using the Furuno Rowind+, mounted at the top of BOREL superstructure (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41344

Meteorological data from the EMSO-Azores seafloor observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the meteorological parameters (mean wind speed, temperature in °C and atmospheric pressure in mbar) acquired between October 2010 and December 2010 (n=332) using the Furuno Rowind+, mounted at the top of BOREL superstructure (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41840

Biodiversity patterns, environmental drivers and indicator species on a High-temperature Hydrothermal edifice, mid-Atlantic ridge
Provedor de dados: 5
Autores: Sarrazin, Jozee; Legendre, Pierre; De Busserolles, Fanny; Fabri, Marie-claire; Guilini, Katja; Ivanenko, Viatcheslav N.; Morineaux, Marie; Vanreusel, Ann; Sarradin, Pierre-marie.
Knowledge on quantitative faunal distribution patterns of hydrothermal communities in slow-spreading vent fields is particularly scarce, despite the importance of these ridges in the global mid-ocean system. This study assessed the composition, abundance and diversity of 12 benthic faunal assemblages from various locations on the Eiffel Tower edifice (Lucky Strike vent field, Mid-Atlantic Ridge) and investigated the role of key environmental conditions (temperature, total dissolved iron (TdFe), sulfide (TdS), copper (TdCu) and pH) on the distribution of macro- and meiofaunal species at small spatial scales (&lt; 1 m). There were differences in macro- and meiofaunal community structure between the different sampling locations, separating the hydrothermal...
Tipo: Text
Palavras-chave: Biodiversity patterns; Environmental drivers; Indicator species; Hydrothermal vents; Mid-Atlantic Ridge; Meiofauna; Macrofauna; Lucky Strike.
Ano: 2015
URL: https://archimer.ifremer.fr/doc/00266/37713/35731.pdf

Iridium GPS 2 data from the EMSO-Azores observatory, 2012-2013
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains the GPS positions of the EMSO-Azores transmission buoy BOREL acquired between Jannuary 2012 and december 2013 using the Iridium/GPS modem 2 (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Environmental monitoring node; MoMAR; BOREL; GPS; Position.
Ano: 2015
URL: http://dx.doi.org/10.17882/41343

Description, distribution and microhabitats of a new species of Tisbe (Copepoda: Harpacticoida: Tisbidae) from a deep-sea hydrothermal vent field at the Mid-Atlantic Ridge (37 degrees N, Lucky Strike)
Provedor de dados: 5
Autores: Ivanenko, Viatcheslav; Ferrari, Frank D.; Defaye, Danielle; Sarradin, Pierre-marie; Sarrazin, Jozee.
A new species, Tisbe dahmsi sp. nov. (Crustacea, Copepoda: Harpacticoida: Tisbidae) is described from the Eiffel Tower edifice located in the Lucky Strike vent field (37 degrees N) (Mid-Atlantic Ridge MAR, 1698 m). The samples were collected in colonization experiments (SMAC arrays) that were deployed in 1997 during the MARVEL cruise and recovered in 1998 during the PICO cruise. Other specimens were collected during the MoMARETO cruise during which a physico-chemical characterization of copepod microhabitats was done. The new species belongs to the T. gracilis group based on similarities of the spine-like inner seta on the proximal endopodal segment of the male second swimming leg, which is terminally bifurcate. Re-examination of the closest relative and...
Tipo: Text
Palavras-chave: Copepoda; Harpacticoida; Tisbidae; Deep-sea; Hydrothermal vent; Mid-Atlantic Ridge; Systematics; Ecology; Microhabitat; In situ experiments; Physico-chemical factors.
Ano: 2011
URL: http://archimer.ifremer.fr/doc/00029/14066/11306.pdf

COSTOF, technical data from SeaMoN West, node of the EMSO-Azores observatory, 2010-2011
Provedor de dados: 5
Autores: Legrand, Julien; Sarradin, Pierre-marie; Cannat, Mathilde.
This dataset contains technical parameters (Voltage in V, current in mA, energy in Ah, internal pressure in mbar, water leak detection) acquired between October 2010 and December 2010 (n=332) by the COSTOF (COmmunication and STOrage Front-end), which is the Electronic core of SeaMoN West, the bottom station of EMSO-Azores dedicated to geophysical observations (data acquired every 6 hours).
Tipo: Dataset
Palavras-chave: Mid-Atlantic Ridge; EMSO; Lucky Strike; Time-series; Geophysical monitoring node; MoMAR; COSTOF.
Ano: 2015
URL: http://dx.doi.org/10.17882/41841

Atypically depleted upper mantle component revealed by Hf isotopes at Lucky Strike segment
Provedor de dados: 5
Autores: Hamelin, Cedric; Bezos, Antoine; Dosso, Laure; Escartin, Javier; Cannat, Mathilde; Mevel, Catherine.
The Earth's upper mantle is commonly depicted as a “marble cake” assemblage of a refractory component mingled with varying amounts of geochemically diverse enriched components. This depleted component controls the major element composition of Mid-Oceanic Ridge Basalts (MORBs). It has long been considered a fairly uniform reservoir, depleted by early melting and well homogenized by subsequent convective stirring. We present new Hf, Nd, Pb and Sr isotopes and trace element data for basalts from the center of the Lucky Strike segment of the Mid-Atlantic Ridge (MAR). Despite the limited size of our sampling area (1.6 km along-axis by 5 km across), these data show a large range of isotopic compositions (similar to that of the whole MAR). It has recently been...
Tipo: Text
Palavras-chave: Oceanic basalts; Mid-Atlantic Ridge; Lucky Strike; Mantle heterogeneity; Hf isotopes.
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00129/24047/23572.pdf

Geological context and vents morphology of the ultramafic-hosted Ashadze hydrothermal areas (Mid-Atlantic Ridge 13 degrees N)
Provedor de dados: 5
Autores: Ondreas, Helene; Cannat, Mathilde; Fouquet, Yves; Normand, Alain.
Recent ROV dives and high-resolution bathymetric data acquired over the Ashadze fields on the Mid-Atlantic Ridge (13 degrees N) allow us to derive constraints on the regional and local geological setting of ultramafic-hosted hydrothermal fields. The active vent fields of Ashadze hydrothermal fields are located in the western axial valley wall, downslope from the termination of a prominent corrugated surface and in a transitional domain with respect to ridge segmentation. The study of the shipboard and ROV bathymetry shows that decameter (100 m by 60 m) to kilometer-scaled rockslides shape the axial valley wall slopes in this region. The Ashadze 1 vent field occurs on a coherent granular landslide rock mass that is elongated in an E-W direction. The Ashadze...
Tipo: Text
Palavras-chave: Ashadze; Mid-Atlantic Ridge; Hydrothermal activity; Hydrothermal explosion crater; Ultramafic rocks.
Ano: 2012
URL: http://archimer.ifremer.fr/doc/00111/22223/19895.pdf

Note on Aglaophenopsis cartieri (Bedot, 1921) (Cnidaria: Leptolida: Aglaopheniidae) and discussion of its taxonomic position
Provedor de dados: 16
Autores: Ramil, F.; Vervoort, W.
A fertile specimen of ‘Cladocarpus’ cartieri Bedot, 1921, from the mid-Atlantic ridge is redescribed. The species is referred to the genus Aglaophenopsis of the tribe Cladocarpini of family Aglaopheniidae where it should stand as Aglaophenopsis cartieri (Bedot, 1921).
Tipo: Article / Letter to the editor
Palavras-chave: Mid-Atlantic Ridge; Leptolida; Aglaopheniidae; Aglaophenopsis; 42.79.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/214434

Some hydroids (Cnidaria: Hydrozoa) from the Mid-Atlantic Ridge, in the North Atlantic Ocean
Provedor de dados: 16
Autores: Calder, D.R.; Vervoort, W.
An account is given of some hydroids from the Mid-Atlantic Ridge, collected during dives of submersibles "Nautile" (operated by IFREMER, France) and "Alvin" (operated by Woods Hole Oceanographic Institution, U.S.A). The specimens came from three main sectors of the ridge: 15 species from localities near hydrothermal fields (540-1727 m) SW of the Azores, five species from an area (2565-3902 m) west of the Cape Verde Islands near Researcher Ridge, and one species from a site (4529-4578 m) within the Vema Fracture zone west of Guinea Bissau. In all, 21 species were distinguished, comprising two anthoathecates and 19 leptothecates. The families Lafoeidae and Sertulariidae were best represented, with six and four species respectively. Halecium profundum spec....
Tipo: Article / Letter to the editor
Palavras-chave: Cnidaria; Hydrozoa; Hydroida; Mid-Atlantic Ridge; Deep water fauna; Hydrothermalism.; 42.72.
Ano: 1998
URL: http://www.repository.naturalis.nl/record/317818