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

Sarradin, Pierre‐Marie; Waeles, Matthieu; Bernagout, Solène; Gall, Christian; Sarrazin, Jozée; Riso, Ricardo

doi:10.1016/j.scitotenv.2008.09.056

Cited by 46 publications

(56 citation statements)

References 55 publications

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“…Each slate substratum was equipped with an autonomous NKE ST 6000 temperature probe, which measured temperature every 15 minutes (Table 1). Temperature is used here as a proxy for hydrothermal influence and a percentage of hydrothermal fluid input at each site was calculated using the formula proposed by Sarradin et al (2009) for the same area (Table 1). Each colonization substrata was measured to evaluate the surface available for colonization.…”

Section: Experimental Design and Sample Collectionmentioning

confidence: 99%

“…The nematodes were divided into four groups, as follows: (i) no buccal cavity or a fine tubular one, as selective (bacterial) feeders (1A); (ii) large, but unarmed, buccal cavity, as non- Table 1 Location, depth and temperature of the sites at the Eiffel Tower edifice (MAR) where different substrata were deployed in 2010 and recovered in 2011 (avg.=average). Fluid inputs in percentage were calculated using the formula provided by Sarradin et al (2009) , and g is the relative contribution (in terms of number of specimens) of each trophic group to the total number of individuals, and n is the number of trophic groups (Heip et al 1985). For n=4, Θ ranges from 0.25 (highest trophic diversity; i,.e.…”

Section: Nematode Biodiversitymentioning

confidence: 99%

“…Variation between the maximal and minimal temperatures was highest at the high emission site (3.4°C) and lowest at the external site (0.6°C). At a given site, temperature can be used as a proxy of hydrothermal influence since it correlates well with the chemical characteristics of the fluids (Sarradin et al 1999;Sarradin et al 2009 Nematode abundance on substrata recovered after 9 months…”

Section: Environmental Conditionsmentioning

confidence: 99%

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

et al. 2015

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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. Near the vents, nematodes preferred inorganic substrata while in areas not influenced by vent activity, organic substrata were preferred. Nematode females dominated at almost all sites while numerous females at the ovigerous stage and juveniles were reported near the vent emissions, suggesting that nematode populations reproduce well after just 9 months. Our nine-month experiment on the MAR showed that the type of substratum influenced significantly the composition of colonising nematodes, while after two years, the community structure was instead influenced by hydrothermal activity.

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Section: Experimental Design and Sample Collectionmentioning

confidence: 99%

Section: Nematode Biodiversitymentioning

confidence: 99%

Section: Environmental Conditionsmentioning

confidence: 99%

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

et al. 2015

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“…A number of additional studies over the past 10 years have further contributed to our understanding of how diffuse flow zone chemistry affects megafaunal organism distribution (Le Bris et al 2003, Nees et al 2008, Podowski et al 2009, Sarrazin et al 1999, Shank et al 1998, the variation of diffuse flow zone chemistry in contrast to end-member high temperature chemistry (Scheirer et al 2006), and the distribution of organic material and its relationship to metal speciation in diffuse flow zones (Sander et al 2007, Sarradin et al 2009). Previous work on hydrothermal sulfur speciation from discrete hydrothermal diffuse flow fluid samples-as well as in the chemoautotrophic tubeworm symbiosis Riftia pachyptila by Gru et al (1998)-used reversephase HPLC to characterize sulfide, sulfite, thiosulfate, cysteine, and glutathione.…”

Section: Introductionmentioning

confidence: 99%

Sulfide Oxidation across Diffuse Flow Zones of Hydrothermal Vents

et al. 2011

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The sulfide (H 2 S/HS -) that is emitted from hydrothermal vents begins to oxidize abiotically with oxygen upon contact with ambient bottom water, but the reaction kinetics are slow. Here, using in situ voltammetry, we report detection of the intermediate sulfur oxidation products polysulfides [S 2Àx ] and thiosulfate [S 2 O 2À 3 ], along with contextual data on sulfide, oxygen, and temperature. At Lau Basin in 2006, thiosulfate was identified in less than one percent of approximately 10,500 scans and no polysulfides were detected. show either thiosulfate or polysulfides. These in situ data indicate that abiotic sulfide oxidation does not readily occur as H 2 S contacts oxic bottom waters. Calculated abiotic potential sulfide oxidation rates are \10 -3 lM/min and are consistent with slow oxidation and the observed lack of sulfur oxidation intermediates. It is known that the thermodynamics for the first electron transfer step for sulfide and oxygen during sulfide oxidation in these systems are unfavorable, and that the kinetics for two electron transfers are not rapid. Here, we suggest that different metal catalyzed and/or biotic reaction pathways can readily produce sulfur oxidation intermediates. Via shipboard high-pressure incubation experiments, we show that snails with chemosynthetic endosymbionts do release polysulfides and may be responsible for our field observations of polysulfides.

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“…The medium consisted of diluted hydrothermal fluid, collected with an in situ fluid sampling system, hereafter referred to as "PEPITO" device (Sarradin et al 2009) in the seawater/fluid mixing zone. During sampling, the minimal temperature recorded was 60 °C while maximum was 190.1 °C which is close to the temperature of about 200 °C measured in the hydrothermal fluid trapped under the flange, close to mirror-like interface.…”

Section: Enrichment Culture Procedures Using Gas-lift Bioreactormentioning

confidence: 99%

Biogeochemical insights into microbe–mineral–fluid interactions in hydrothermal chimneys using enrichment culture

et al. 2015

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Active hydrothermal chimneys host diverse microbial communities exhibiting various metabolisms including those involved in various biogeochemical cycles. To investigate microbe-mineral-fluid interactions in hydrothermal chimney and the driver of microbial diversity, a cultural approach using a gas-lift bioreactor was chosen. An enrichment culture was performed using crushed active chimney sample as inoculum and diluted hydrothermal fluid from the same vent as culture medium. Daily sampling provided time-series access to active microbial diversity and medium composition. Active archaeal and bacterial communities consisted mainly of sulfur, sulfate and iron reducers and hydrogen oxidizers with the detection of Thermococcus, Archaeoglobus, Geoglobus, Sulfurimonas and Thermotoga sequences. The simultaneous presence of active Geoglobus sp. and Archaeoglobus sp. argues against competition for available carbon sources and electron donors between sulfate and iron reducers at high temperature. This approach allowed the cultivation of microbial populations that were under-represented in the initial environmental sample. The microbial communities are heterogeneously distributed within the gas-lift bioreactor; it is unlikely that bulk mineralogy or fluid chemistry is the drivers of microbial community structure. Instead, we propose that micro-environmental niche characteristics, created by the interaction between the mineral grains and the fluid chemistry, are the main drivers of microbial diversity in natural systems.

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

Cited by 46 publications

References 55 publications

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

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

Sulfide Oxidation across Diffuse Flow Zones of Hydrothermal Vents

Biogeochemical insights into microbe–mineral–fluid interactions in hydrothermal chimneys using enrichment culture

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