Search Results - "Jezequel, Didier"

Preservation of organic C and N isotope signatures from water column to sediments in the anoxic and ferruginous Pavin lake by Busigny, Vincent, Lebeau, Oanez, Jézéquel, Didier, Chaduteau, Carine, Crowe, Sean, Ader, Magali

“…Organic carbon (Corg) and bulk nitrogen (Nbulk) isotope compositions (respectively d13Corg and d15Nbulk) of sedimentary rocks deposited in the Archean and…”
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Microbial diversity involved in iron and cryptic sulfur cycling in the ferruginous, low-sulfate waters of Lake Pavin by Berg, Jasmine S, Jézéquel, Didier, Duverger, Arnaud, Lamy, Dominique, Laberty-Robert, Christel, Miot, Jennyfer

“…Both iron- and sulfur- reducing bacteria strongly impact the mineralogy of iron, but their activity has long been thought to be spatially and temporally…”
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Biomineralization of iron-phosphates in the water column of Lake Pavin (Massif Central, France) by Cosmidis, Julie, Benzerara, Karim, Morin, Guillaume, Busigny, Vincent, Lebeau, Oanez, Jézéquel, Didier, Noël, Vincent, Dublet, Gabrielle, Othmane, Guillaume

“…The availabilities of iron and phosphorus have considerably impacted biological productivity in past and present natural aquatic environments, and therefore…”
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Production and consumption of methane in freshwater lake ecosystems by Borrel, Guillaume, Jézéquel, Didier, Biderre-Petit, Corinne, Morel-Desrosiers, Nicole, Morel, Jean-Pierre, Peyret, Pierre, Fonty, Gérard, Lehours, Anne-Catherine

“…The atmospheric concentration of methane (CH 4), a major greenhouse gas, is mainly controlled by the activities of methane-producing (methanogens) and…”
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Iron isotopes in an Archean ocean analogue by Busigny, Vincent, Planavsky, Noah J., Jézéquel, Didier, Crowe, Sean, Louvat, Pascale, Moureau, Julien, Viollier, Eric, Lyons, Timothy W.

“…Iron isotopes have been extensively used to trace the history of microbial metabolisms and the redox evolution of the oceans. Archean sedimentary rocks display…”
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Carbon isotope evidence for large methane emissions to the Proterozoic atmosphere by Cadeau, Pierre, Jézéquel, Didier, Leboulanger, Christophe, Fouilland, Eric, Le Floc’h, Emilie, Chaduteau, Carine, Milesi, Vincent, Guélard, Julia, Sarazin, Gérard, Katz, Amandine, d’Amore, Sophie, Bernard, Cécile, Ader, Magali

“…The Proterozoic Era records two periods of abundant positive carbon isotope excursions (CIEs), conventionally interpreted as resulting from increased organic…”
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Intracellular amorphous Ca-carbonate and magnetite biomineralization by a magnetotactic bacterium affiliated to the Alphaproteobacteria by Monteil, Caroline L., Benzerara, Karim, Menguy, Nicolas, Bidaud, Cécile C., Michot-Achdjian, Emmanuel, Bolzoni, Romain, Mathon, François P., Coutaud, Margot, Alonso, Béatrice, Garau, Camille, Jézéquel, Didier, Viollier, Eric, Ginet, Nicolas, Floriani, Magali, Swaraj, Sufal, Sachse, Martin, Busigny, Vincent, Duprat, Elodie, Guyot, François, Lefevre, Christopher T.

“…Bacteria synthesize a wide range of intracellular submicrometer-sized inorganic precipitates of diverse chemical compositions and structures, called…”
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Extreme methane clumped isotopologue bio-signatures of aerobic and anaerobic methanotrophy: Insights from the Lake Pavin and the Black Sea sediments by Giunta, Thomas, Young, Edward D., Labidi, Jabrane, Sansjofre, Pierre, Jézéquel, Didier, Donval, Jean-Pierre, Brandily, Christophe, Ruffine, Livio

“…Microbial methane oxidation - or methanotrophy - is a key control of the global methane budget on Earth, and perhaps in other planetary systems. Here, we…”
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Mercury, organic matter, iron, and sulfur co-cycling in a ferruginous meromictic lake by Tisserand, Delphine, Guédron, Stéphane, Viollier, Eric, Jézéquel, Didier, Rigaud, Sylvain, Campillo, Sylvain, Sarret, Géraldine, Charlet, Laurent, Cossa, Daniel

“…Mercury (Hg) speciation in natural waters is controlled by redox conditions and microbiological activity. Water columns of meromictic lakes have large and…”
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Impact of the seismo-volcanic crisis offshore Mayotte on the Dziani Dzaha Lake by Cadeau, Pierre, Jézéquel, Didier, Groleau, Alexis, Di Muro, Andrea, Ader, Magali

“…Since May 2018, an unexpected long and intense seismic crisis started offshore Mayotte (Indian Ocean, France). This ongoing seismic sequence is associated with…”
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Long‐range transport of littoral methane explains the metalimnetic methane peak in a large lake by Khatun, Santona, Berg, Jasmine S., Jézéquel, Didier, Moiron, Marthe, Escoffier, Nicolas, Schubert, Carsten J, Bouffard, Damien, Perga, Marie‐Elodie

“…In large and stratified lakes, substantial methane stocks are often observed within the metalimnion. The origin of the methane (CH4) accumulated in the…”
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A multiscale study of mercury transformations and dynamics at the chemocline of the Petit-Saut tropical reservoir (French Guiana) by Muresan, Bogdan, Metzger, Édouard, Jézéquel, Didier, Cossa, Daniel

“…This study investigated, on both metric and centimetric scales, mercury (Hg) transformations and dynamics within a water column chemocline of a tropical…”
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The Dziani Dzaha Lake: A long‐awaited modern analogue for superheavy pyrites by Cadeau, Pierre, Cartigny, Pierre, Thomazo, Christophe, Jézéquel, Didier, Leboulanger, Christophe, Sarazin, Gérard, Ader, Magali

“…Sedimentary records of superheavy pyrites in Phanerozoic and Proterozoic successions (i.e., extremely positive δ34Spyrite values together with higher…”
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Simultaneous 2D Imaging of Dissolved Iron and Reactive Phosphorus in Sediment Porewaters by Thin-Film and Hyperspectral Methods by Cesbron, Florian, Metzger, Edouard, Launeau, Patrick, Deflandre, Bruno, Delgard, Marie-Lise, Thibault de Chanvalon, Aubin, Geslin, Emmanuelle, Anschutz, Pierre, Jézéquel, Didier

“…This study presents a new approach combining diffusive equilibrium in thin-film (DET) and spectrophotometric methods to determine the spatial variability of…”
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Spatiotemporal variations in microbial diversity across the three domains of life in a tropical thalassohaline lake (Dziani Dzaha, Mayotte Island) by Hugoni, Mylène, Escalas, Arthur, Bernard, Cécile, Nicolas, Sébastien, Jézéquel, Didier, Vazzoler, Fanny, Sarazin, Gerard, Leboulanger, Christophe, Bouvy, Marc, Got, Patrice, Ader, Magali, Troussellier, Marc, Agogué, Hélène

“…Thalassohaline ecosystems are hypersaline environments originating from seawater in which sodium chloride is the most abundant salt and the pH is alkaline…”
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Stratification of Archaea in the deep sediments of a freshwater meromictic lake: vertical shift from methanogenic to uncultured archaeal lineages by Borrel, Guillaume, Lehours, Anne-Catherine, Crouzet, Olivier, Jézéquel, Didier, Rockne, Karl, Kulczak, Amélie, Duffaud, Emilie, Joblin, Keith, Fonty, Gérard

“…As for lineages of known methanogens, several lineages of uncultured archaea were recurrently retrieved in freshwater sediments. However, knowledge is missing…”
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Phytoplanktonic species in the haloalkaline Lake Dziani Dzaha select their archaeal microbiome by Bruto, Maxime, Oger, Philippe M., Got, Patrice, Bernard, Cécile, Melayah, Delphine, Cloarec, Lilian A., Duval, Charlotte, Escalas, Arthur, Duperron, Sébastien, Guigard, Ludivine, Leboulanger, Christophe, Ader, Magali, Sarazin, Gerard, Jézéquel, Didier, Agogué, Hélène, Troussellier, Marc, Hugoni, Mylène

“…Microorganisms are key contributors of aquatic biogeochemical cycles but their microscale ecology remains largely unexplored, especially interactions occurring…”
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Identification of microbial communities involved in the methane cycle of a freshwater meromictic lake by Biderre-Petit, Corinne, Jézéquel, Didier, Dugat-Bony, Eric, Lopes, Filipa, Kuever, Jan, Borrel, Guillaume, Viollier, Eirc, Fonty, Gerard, Peyret, Pierre

“…Abstract Lake Pavin is a meromictic crater lake located in the French Massif Central area. In this ecosystem, most methane (CH4) produced in high quantity in…”
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Two-dimensional determination of dissolved manganese in sediment porewaters by Mouret, Aurélia, Choquel, Constance, Thibault de Chanvalon, Aubin, Cesbron, Florian, Jauffrais, Thierry, Jézéquel, Didier, Launeau, Patrick, Barbe, Anthony, Levrard, Romain, Nicol, Alan, Charbonnier, Céline, Metzger, Edouard

“…We present a new method for imaging dissolved manganese at millimeter scale by coupling DET (diffusive equilibrium in thin film) and colorimetric techniques…”
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Transcriptomic insights into the dominance of two phototrophs throughout the water column of a tropical hypersaline-alkaline crater lake (Dziani Dzaha, Mayotte) by Duperron, Sébastien, Halary, Sébastien, Bouly, Jean-Pierre, Roussel, Théotime, Hugoni, Myléne, Bruto, Maxime, Oger, Philippe M, Duval, Charlotte, Woo, Anthony, Jézéquel, Didier, Ader, Magali, Leboulanger, Christophe, Agogué, Hélène, Grossi, Vincent, Troussellier, Marc, Bernard, Cécile

“…Saline-alkaline lakes often shelter high biomasses despite challenging conditions, owing to the occurrence of highly adapted phototrophs. Dziani Dzaha…”
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