FN Archimer Export Format
PT J
TI Ammonium and Sulfate Assimilation Is Widespread in Benthic Foraminifera
BT 
AF LeKieffre, Charlotte
   Jauffrais, Thierry
   Bernhard, Joan M.
   Filipsson, Helena L.
   Schmidt, Christiane
   Roberge, Hélène
   Maire, Olivier
   Panieri, Giuliana
   Geslin, Emmanuelle
   Meibom, Anders
AS 1:1,2;2:3;3:4;4:5;5:1,6;6:1;7:7;8:6;9:1;10:2,8;
FF 1:;2:PDG-RBE-LEADNC;3:;4:;5:;6:;7:;8:;9:;10:;
C1 LPG UMR 6112, Univ Angers, Nantes Université, Le Mans Univ, CNRS, Angers, France
   Laboratory for Biological Geochemistry, School of Architecture, Civil- and Environmental Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
   Ifremer, IRD, Univ. Nouvelle-Calédonie, Univ. La Réunion, CNRS, UMR 9220 ENTROPIE, Nouméa, New Caledonia
   Geology and Geophysics Department, Woods Hole Oceanographic Institution, Woods Hole, MA, United States
   Department of Geology, Lund University, Lund, Sweden
   Centre for Arctic Gas Hydrate, Environment and Climate (CAGE), Department of Geosciences, UiT The Arctic University of Norway, Tromsø, Norway
   Univ. Bordeaux, EPOC, UMR 5805 CNRS, OASU, Arcachon, France
   Center for Advanced Surface Science (CASA), Institute of Earth Sciences, University of Lausanne, Lausanne, Switzerland
C2 UNIV ANGERS, FRANCE
   EPFL, SWITZERLAND
   IFREMER, FRANCE
   WHOI, USA
   UNIV LUND, SWEDEN
   UNIV ARCTIC UIT NORWAY, NORWAY
   UNIV BORDEAUX, FRANCE
   UNIV LAUSANNE, SWITZERLAND
SI NOUMEA
SE PDG-RBE-LEADNC
UM ENTROPIE
IN WOS Ifremer UMR
   DOAJ
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 3.7
TC 2
UR https://archimer.ifremer.fr/doc/00785/89736/95218.pdf
   https://archimer.ifremer.fr/doc/00785/89736/95219.pdf
   https://archimer.ifremer.fr/doc/00785/89736/95220.pdf
LA English
DT Article
DE ;marine protists;coastal environments;biogeochemical cycles;NanoSIMS;nitrogen;sulfur
AB Nitrogen and sulfur are key elements in the biogeochemical cycles of marine ecosystems to which benthic foraminifera contribute significantly. Yet, cell-specific assimilation of ammonium, nitrate and sulfate by these protists is poorly characterized and understood across their wide range of species-specific trophic strategies. For example, detailed knowledge about ammonium and sulfate assimilation pathways is lacking and although some benthic foraminifera are known to maintain intracellular pools of nitrate and/or to denitrify, the potential use of nitrate-derived nitrogen for anabolic processes has not been systematically studied. In the present study, NanoSIMS isotopic imaging correlated with transmission electron microscopy was used to trace the incorporation of isotopically labeled inorganic nitrogen (ammonium or nitrate) and sulfate into the biomass of twelve benthic foraminiferal species from different marine environments. On timescales of twenty hours, no detectable 15N-enrichments from nitrate assimilation were observed in species known to perform denitrification, indicating that, while denitrifying foraminifera store intra-cellular nitrate, they do not use nitrate-derived nitrogen to build their biomass. Assimilation of both ammonium and sulfate, with corresponding 15N and 34S-enrichments, were observed in all species investigated (with some individual exceptions for sulfate). Assimilation of ammonium and sulfate thus can be considered widespread among benthic foraminifera. These metabolic capacities may help to underpin the ability of benthic foraminifera to colonize highly diverse marine habitats. 
PY 2022
PD JUN
SO Frontiers In Marine Science
SN 2296-7745
PU Frontiers Media SA
VL 9
UT 000836228500001
DI 10.3389/fmars.2022.861945
ID 89736
ER

EF