Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 99
Primeira ... 12345 ... Última
Imagem não selecionada

Imprime registro no formato completo
3D Reconstruction of Natural Underwater Scenes Using the Stereovision System IRIS ArchiMer
Brandou, Vincent; Allais, Anne-gaelle; Perrier, Michel; Malis, E.; Rives, P.; Sarrazin, Jozee; Sarradin, Pierre-marie.
The aim of this study is to propose a 3-dimension reconstruction method of small-scale scenes improved by a new image acquisition method for quantitative measurements. A stereovision system is used to acquire images in order to obtain several shots of an object, at regular intervals according to a predefined trajectory. A complete methodology of 3D reconstruction is exposed to perform a dense 3D model with texture mapping. A first result on natural images collected with the stereovision system during sea trials has been obtained.
Tipo: Text Palavras-chave: Underwater imaging; Stereovision system; Visual servoing; Dense disparity map; 3D reconstruction.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3598.pdf
Imagem não selecionada

Imprime registro no formato completo
A comparison of in situ vs. ex situ filtration methods on the assessment of dissolved and particulate metals at hydrothermal vents ArchiMer
Cotte, Laura; Waeles, Mathieu; Pernet-coudrier, Benoit; Sarradin, Pierre-marie; Cathalot, Cecile; Riso, Ricardo D..
The objective of this study was to assess the impact of the filtration method (in situ vs. ex situ) on the dissolved/particulate partitioning of 12 elements in hydrothermal samples collected from the Lucky Strike vent field (Mid-Atlantic Ridge; MAR). To do so, dissolved ( <0.45 mu m) and particulate Mg, Li, Mn, U, V, As, Ba, Fe, Zn, Cd, Pb and Cu were measured using different techniques (HR-ICP-MS, ICP-AES and CCSA). Using in situ filtration as a baseline, we showed that ex situ filtration (on-board and on shore after freezing) resulted in an underestimation of the dissolved pool, which was counterbalanced by an overestimation of the particulate pool for almost all the elements studied. We also showed that on-board filtration was acceptable for the...
Tipo: Text Palavras-chave: Metal; Hydrothermal vent; Dissolved; Particulate; Filtration method.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00298/40970/42656.pdf
Imagem não selecionada

Imprime registro no formato completo
A dual sensor device to estimate fluid flow velocity at diffuse hydrothermal vents ArchiMer
Sarrazin, Jozee; Rodier, Philippe; Tivey, M. K.; Singh, H.; Schultz, A.; Sarradin, Pierre-marie.
Numerous attempts have been made over the last thirty years to estimate fluid flow rates at hydrothermal vents, either at the exit of black smoker chimneys or within diffuse flow areas. In this study, we combine two methods to accurately estimate fluid flow velocities at diffuse flow areas. While the first method uses a hot film anemometer that performs high-frequency measurements, the second allows a relatively rapid assessment of fluid flow velocity through video imagery and provides in situ data to calibrate the sensor. Measurements of flow velocities on hydrothermal diffuse flow areas were obtained on the Mid-Atlantic Ridge (MAR). They range from 1.1 to 4.9 mm/s at the substratum level, in low-temperature (4.5-16.4 degrees C) diffuse flow areas from...
Tipo: Text Palavras-chave: Diffuse flow; Video imagery; Hot film anemometer; Hydrothermal vent; Fluid flow velocity.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-7299.pdf
Imagem não selecionada

Imprime registro no formato completo
A real-time dive on active hydrothermal vents ArchiMer
Sarrazin, Jozee; Sarradin, Pierre-marie; Buffier, Erick; Christophe, Alain; Clodic, Guillaume; Desbruyeres, Damien; Fouquet, Yves; Gouillou, Michel; Jannez, Michel; Le Fur, Yann; Le Rest, Jacques; Lecornu, Fabrice; Lefort, Olivier; Lux, Stephanie; Millet, Brigitte; Guillemet, Pascal.
The Momareto cruise was held from August 6 to September 6, 2006 on the new French oceanographic vessel Pourquoi pas? The ROV Victor 6000 visited three vent fields, ranging from 850m to 2300m, on the Mid-Atlantic Ridge. The scientific objective of the cruise was to study the spatial and temporal dynamics of hydrothermal communities colonizing these active vent sites. Aside scientific and technological objectives, one of the major goals of this cruise was to share the excitement of our science with the public. For this, the results of the project were shared through different media. The most challenging and exciting communication event remains the real-time transmission of images acquired by the ROV Victor at 1700m depth to a 250 person audience on land.
Tipo: Text Palavras-chave: Deep-sea; Ecosystems; Outreach; Real-time.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-3599.pdf
Imagem não selecionada

Imprime registro no formato completo
Analysis of dissolved gases by headspace sampling gas chromatography with column and detector switching. Preliminary results ArchiMer
Sarradin, Pierre-marie; Caprais, Jean-claude.
This preliminary study presents a new method for the determination of dissolved gases in sea-water. After headspace extraction, gaseous compounds are separated by GC on a dual column adsorption system, The individual species are thereafter eluted to three different detectors (thermal conductivity, flame ionization and FPD) using a second switching valve, The analysis is quantitative for methane and carbon dioxide with limits of determination of 0.1 and 50 mu mol l(-1), respectively, and corresponding standard deviations of 4 and 7%, and has been applied to deep sea hydrothermal samples, Further optimization is necessary to allow the quantitative determination of hydrogen sulfide, nitrogen, oxygen and carbon monoxide.
Tipo: Text
Ano: 1996 URL: http://archimer.ifremer.fr/doc/00186/29766/28198.pdf
Imagem não selecionada

Imprime registro no formato completo
Are spatial variations in the diets of hydrothermal fauna linked to local environmental conditions? ArchiMer
De Busserolles, F.; Sarrazin, Jozee; Gauthier, Olivier; Gelinas, Y.; Fabri, Marie-claire; Sarradin, Pierre-marie; Desbruyeres, Daniel.
Trophic relationships in Bathymodiolus azoricus mussel bed communities on the Tour Eiffel hydrothermal edifice (Lucky Strike) were assessed using delta C-13 and delta N-15 signatures from 14 hydrothermal species. The nutritional basis of B. azoricus was also investigated with delta S-34. Faunal samples and environmental data (temperature, pH, total dissolved sulfide, iron and copper concentrations) were collected from 12 different locations on the edifice. Chemical conditions varied between microhabitats, and were all correlated to temperature. Carbon and nitrogen isotopic results revealed the presence of two, apparently independent, trophic groups. The first was composed of symbiont-bearing fauna (B. azoricus and their associated polychaetes...
Tipo: Text Palavras-chave: Lucky Strike (37 degrees 17.29 ' N 32 degrees 16.45 ' W); Mid Atlantic Ridge; Food webs; Hydrothermal springs; Environmental conditions; Stable isotopes.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-7312.pdf
Imagem não selecionada

Imprime registro no formato completo
Astronomical and atmospheric impacts on deep-sea hydrothermal vent invertebrates ArchiMer
Lelievre, Yann; Legendre, Pierre; Matabos, Marjolaine; Mihaly, Steve; Lee, Raymond W.; Sarradin, Pierre-marie; Arango, Claudia P.; Sarrazin, Jozee.
Ocean tides and winter surface storms are among the main factors driving the dynamics and spatial structure of marine coastal species, but the understanding of their impact on deep-sea and hydrothermal vent communities is still limited. Multidisciplinary deep-sea observatories offer an essential tool to study behavioural rhythms and interactions between hydrothermal community dynamics and environmental fluctuations. Here, we investigated whether species associated with a Ridgeia piscesae tubeworm vent assemblage respond to local ocean dynamics. By tracking variations in vent macrofaunal abundance at different temporal scales, we provide the first evidence that tides and winter surface storms influence the distribution patterns of mobile and non-symbiotic...
Tipo: Text Palavras-chave: Deep-sea observatory; Hydrothermal vents; Macrofaunal abundance; Surface storms; Ocean tides; Time-series analysis.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00380/49122/49554.pdf
Imagem não selecionada

Imprime registro no formato completo
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: https://archimer.ifremer.fr/doc/00266/37714/35732.pdf
Imagem não selecionada

Imprime registro no formato completo
Benthic Biology Time-Series in the Deep Sea: Indicators of Change ArchiMer
Larkin, K.e.; Rhul, H.a.; Bagley, P.; Benn, A.; Bett, B.j.; Billett, D.s.m.; Boetius, A.; Chevaldonné, P.; Colaco, A.; Copley, J.; Danovaro, R.; Escobar-briones, E.; Glover, A.; Gooday, A.j.; Hugues, J.a.; Kalogeropoulou, V.; Kelly-gerreyn, B.a.; Kitazato, H.; Klages, M.; Lampadariou, N.; Lejeusne, C.; Perez, T.; Priede, I.g.; Rogers, A.; Sarradin, Pierre-marie; Sarrazin, Jozee; Soltwedel, T.; Soto, E.h.; Thatje, S.; Tselepides, A.; Tyler, P.a.; Van Den Hove, S.; Vanreusel, A.; Wenzhofer, F..
The responsiveness of benthic biological communities to climatic drivers and shifts makes them powerful indicators of biogeochemical and other environmental change in the oceans. In addition, benthic ecosystems have an economic value and are considered a vital marine resource. However deep-sea faunal dynamics and ecosystem functioning is not well defined. This has placed a higher priority in recent years on developing and sustaining long-term, time-series studies of benthic biodiversity, rate processes, and ecosystem change in deep-sea and extreme habitats. A few key long-term time-series sites exist across the global Ocean. Many of these sites are reviewed in this paper. However, much of the existing research is uncoordinated and the data collected are...
Tipo: Text
Ano: 2010 URL: http://archimer.ifremer.fr/doc/00280/39112/37665.pdf
Imagem não selecionada

Imprime registro no formato completo
Bioaccumulation of Hg, Cu, and Zn in the Azores triple junction hydrotherinal vent fields food web ArchiMer
Colaco, Ana; Bustamante, Paco; Fouquet, Yves; Sarradin, Pierre-marie; Serrao Santos, R.
In this work, mercury (Hg), copper (Cu) and zinc (Zn) concentrations and tissue distribution are determined in seven benthic invertebrates species (the key species) from the Mid Atlantic Ridge (MAR) hydrothermal vent fields. The samples were collected from three hydrothermal vent fields - Menez Gwen, 840 m;, Lucky Strike, 1700 m and Rainbow, 2300 m - near the Azores Triple Junction. These fields are characterized by different depths, geological context and chemical composition of the hydrothermal fluid, particularly the metal content, which is reflected by the metal concentrations in the organisms. Indeed, our results show that organisms from Menez Gwen presented the highest Hg concentrations, while those from Lucky Strike and Rainbow were richer in Cu and...
Tipo: Text Palavras-chave: Mid Atlantic Ridge; Trophic relations; Trophic transfer; Biomagnification; Vent ecosystems; Heavy metals.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-2305.pdf
Imagem não selecionada

Imprime registro no formato completo
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: https://archimer.ifremer.fr/doc/00266/37713/35731.pdf
Imagem não selecionada

Imprime registro no formato completo
Biological and environmental rhythms in (dark) deep-sea hydrothermal ecosystems ArchiMer
Cuvelier, Daphne; Legendre, Pierre; Laes-huon, Agathe; Sarradin, Pierre-marie; Sarrazin, Jozee.
During 2011, two deep-sea observatories focusing on hydrothermal vent ecology were up and running in the Atlantic (Eiffel Tower, Lucky Strike vent field) and the Northeast Pacific Ocean (NEP) (Grotto, Main Endeavour Field). Both ecological modules recorded imagery and environmental variables jointly for a time span of 23 days (7–30 October 2011) and environmental variables for up to 9 months (October 2011–June 2012). Community dynamics were assessed based on imagery analysis and rhythms in temporal variation for both fauna and environment were revealed. Tidal rhythms were found to be at play in the two settings and were most visible in temperature and tubeworm appearances (at NEP). A  ∼  6 h lag in tidal rhythm occurrence was observed between Pacific and...
Tipo: Text
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00389/50069/50662.pdf
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
Brief account of the chemical environment at hydrothermal vent mussel beds on the MAR ArchiMer
Sarradin, Pierre-marie; Caprais, Jean-claude; Riso, Ricardo; Comtet, Thierry; Aminot, Alain.
Tipo: Text
Ano: 1998 URL: http://archimer.ifremer.fr/doc/00186/29765/28199.pdf
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
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
Imagem não selecionada

Imprime registro no formato completo
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
Registros recuperados: 99
Primeira ... 12345 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional