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Registros recuperados: 59
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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 ArchiMer
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
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Atypically depleted upper mantle component revealed by Hf isotopes at Lucky Strike segment ArchiMer
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
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Behavioural study of two Hydrothermal crustacean decapods: Mirocaris fortunata and Segonzacia mesatlantica, from the lucky strike vent field (mid-Atlantic ridge) ArchiMer
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: http://archimer.ifremer.fr/doc/00266/37714/35732.pdf
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Biodiversity patterns, environmental drivers and indicator species on a High-temperature Hydrothermal edifice, mid-Atlantic ridge ArchiMer
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 (< 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: http://archimer.ifremer.fr/doc/00266/37713/35731.pdf
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Biological data extraction from imagery - How far can we go? A case study from the Mid-Atlantic Ridge ArchiMer
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
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Buoy management unit 1 data from the EMSO-Azores observatory, 2010-2011 ArchiMer
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
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Buoy management unit 1 data from the EMSO-Azores observatory, 2011-2012 ArchiMer
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
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Buoy management unit 1 data from the EMSO-Azores observatory, 2012-2013 ArchiMer
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
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Buoy management unit 1 data from the EMSO-Azores observatory, 2013-2014 ArchiMer
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
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Buoy management unit 1 data from the EMSO-Azores observatory, 2014-2015 ArchiMer
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
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Buoy management unit 2 data from the EMSO-Azores observatory, 2010-2011 ArchiMer
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
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Buoy management unit 2 data from the EMSO-Azores observatory, 2011-2012 ArchiMer
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
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Buoy management unit 2 data from the EMSO-Azores observatory, 2012-2013 ArchiMer
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
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Buoy management unit 2 data from the EMSO-Azores observatory, 2013-2014 ArchiMer
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
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Buoy management unit 2 data from the EMSO-Azores observatory, 2014-2015 ArchiMer
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
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Community dynamics over a decadal scale at Logatchev, 14 degrees 45 ' N, Mid-Atlantic Ridge ArchiMer
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
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Comparison of microbial communities associated with three Atlantic ultramafic hydrothermal systems ArchiMer
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>11; T<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
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Constraints on the shallow velocity structure of the Lucky Strike Volcano, Mid-Atlantic Ridge, from downward continued multichannel streamer data ArchiMer
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
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COSTOF, technical data from SeaMoN East, node of the EMSO-Azores observatory, 2010-2011 ArchiMer
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
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COSTOF, technical data from SeaMoN East, node of the EMSO-Azores observatory, 2011-2012 ArchiMer
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
Registros recuperados: 59
Primeira ... 123 ... Última
 

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