EXtreme ecosystem studies in the deep OCEan : Technological Developments

Sarradin, Pierre‐Marie; Sarrazin, Jozée; Allais, Anne-Gaëlle; Almeida, Danilo Roberti Alves de; Brandou, Vincent; Boetius, Antje; Buffier, E.; Coiras, E.; Colaço, Ana; Cormack, Andrew; Dentrecolas, S.; Desbruyères, Daniel; Dorval, P.; Buf, H Du; Dupont, J.; Godfroy, Anne; Gouillou, M.; Gronemann, J.; Hamel, G.; Hamon, Michel; Hoge, Ulrich; Lane, D. Philip; Gall, Christian; Leroux, D.; Legrand, J.; Léon, Pierre; Levêque, J.; Masson, Marcus Vinícius; Olu, Karine; Pascoal, A.; Sauter, Eberhard; Sanfilippo, Luca; Savino, Enrico; Sebastião, Luís; Santos, Ricardo S.; Siméoni, P.; Schultz, Adam; Sudreau, J.P.; Taylor, Philip Russel; Vuillemin, Renaud; Waldmann, Christoph; Wenzhöfer, Frank; Zal, Franck

doi:10.1109/oceanse.2007.4302376

Cited by 9 publications

(7 citation statements)

References 12 publications

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“…All water samples were collected along the hydrothermal fluid-seawater mixing gradient with the PEPITO sampler implemented on the ROV Victor 6000 (Sarradin et al 2007). This sampling device can sample down to 6000 m depth and was fitted with blood bags (PVC, Baxter Fenwall 2L, sterile/NP-FP, R4R2041).…”

Section: Sampling and Filtrationmentioning

confidence: 99%

A comparison of in situ vs. ex situ filtration methods on the assessment of dissolved and particulate metals at hydrothermal vents

Cotte

Waeles

Pernet-Coudrier

et al. 2015

Deep Sea Research Part I: Oceanographic Research Papers

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A comparison of in situ vs. ex situ filtration methods on the assessment of dissolved and particulate metals at Hydrothermal vents, Deep-Sea Research Part I, http://dx. ABSTRACTThe 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 µm) 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 assessment of dissolved and particulate Mn, Mg, Li and U for which 2 the measurement bias for the dissolved fraction did not exceed 3%. However, in situ filtration appeared necessary for the accurate assessment of the dissolved and particulate concentrations of V, As, Fe, Zn, Ba, Cd, Pb and Cu. In the case of Fe, on-board filtration underestimated the dissolved pool by up to 96%. Laboratory filtration (after freezing) resulted in a large bias in the dissolved and particulate concentrations, unambiguously discounting this filtration method for deep-sea chemical speciation studies. We discuss our results in light of the precipitation processes that can potentially affect the accuracy of ex situ filtration methods.

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Section: Sampling and Filtrationmentioning

confidence: 99%

A comparison of in situ vs. ex situ filtration methods on the assessment of dissolved and particulate metals at hydrothermal vents

Cotte

Waeles

Pernet-Coudrier

et al. 2015

Deep Sea Research Part I: Oceanographic Research Papers

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“…Figure 2) using the "PEPITO" sampler of the ROV Victor 6000. PEPITO is a new water sampling device qualified up to 6000 m depth (Sarradin et al, 2007). It can collect up to 23 water samples in 200 mL titanium/PEEK bottles.…”

Section: Sampling and Sample Treatmentmentioning

confidence: 99%

Speciation of dissolved copper within an active hydrothermal edifice on the Lucky Strike vent field (MAR, 37°N)

Sarradin

Waeles

Bernagout

et al. 2009

Science of The Total Environment

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The objective of this study was to determine the concentrations of different fractions of dissolved copper (after filtration at 0.45 microm) along the cold part of the hydrothermal fluid-seawater mixing zone on the Tour Eiffel edifice (MAR). Dissolved copper was analyzed by stripping chronopotentiometry (SCP) after chromatographic C(18) extraction. Levels of total dissolved copper (0.03 to 5.15 microM) are much higher than those reported for deep-sea oceanic waters but in accordance with data previously obtained in this area. Speciation measurements show that the hydrophobic organic fraction (C(18)Cu) is very low (2+/-1%). Dissolved copper is present mainly as inorganic and hydrophilic organic complexes (nonC(18)Cu). The distribution of copper along the pH gradient shows the same pattern for each fraction. Copper concentrations increase from pH 5.6 to 6.5 and then remain relatively constant at pH>6.5. Concentrations of oxygen and total sulphides demonstrate that the copper anomaly corresponds to the transition between suboxic and oxic waters. The increase of dissolved copper should correspond to the oxidative redissolution of copper sulphide particles formed in the vicinity of the fluid exit. The presence of such a secondary dissolved copper source, associated with the accumulation of metal sulphide particles, could play a significant role in the distribution of fauna in the different habitats available at vents.

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“…In recent years, underwater video techniques have been increasingly used for observing macrofauna and habitat in marine ecosystems (see e.g. Sarradin et al, 2007 for a review concerning deep ecosystems). Technological progress regarding video cameras, sensors (such as sounders), battery life and information storage now make these techniques accessible to the majority of users.…”

Section: Introductionmentioning

confidence: 99%

Underwater video techniques for observing coastal marine biodiversity: A review of sixty years of publications (1952–2012)

Mallet

Pelletier²

2014

Fisheries Research

328

277

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Underwater video techniques are increasingly used in marine ecology studies. Technological progress regarding video cameras, sensors (such as sounders), battery life and information storage make these techniques now accessible to a majority of users. However, diver-based underwater visual censuses, and catch and effort data, remain the most commonly used for observing coastal biodiversity and species. In this paper, we review the underwater video techniques that have been developed since the 1950s to investigate and/or monitor coastal biodiversity. Techniques such as remote underwater video, whether baited or not, diver-operated video and towed video are described, along with corresponding applications in the field. We then analyse the complementary of techniques, first from studies comparing video techniques with other observation techniques, whether video-based or not, and second by documenting their respective cost efficiencies. These findings are discussed with respect to current challenges in monitoring and investigating coastal biodiversity. Video should be more often considered and used, either in addition to or as an alternative to diver-based, fishing and acoustic techniques, as it may be particularly suited for monitoring coastal biodiversity in a variety of areas and on larger scales than hitherto and within an ecosystem-based approach to management and conservation. Highlights ► Underwater video is increasingly used in marine ecology. ► Video is less used than catch and underwater visual census. ► Video techniques comprise baited, unbaited, towed and diver-operated techniques. ► Video is a cost-efficient complement or alternative to other observation techniques.

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EXtreme ecosystem studies in the deep OCEan : Technological Developments

Cited by 9 publications

References 12 publications

A comparison of in situ vs. ex situ filtration methods on the assessment of dissolved and particulate metals at hydrothermal vents

A comparison of in situ vs. ex situ filtration methods on the assessment of dissolved and particulate metals at hydrothermal vents

Speciation of dissolved copper within an active hydrothermal edifice on the Lucky Strike vent field (MAR, 37°N)

Underwater video techniques for observing coastal marine biodiversity: A review of sixty years of publications (1952–2012)

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