Show simple item record

dc.contributor.authorLeKieffre, Charlotte
dc.contributor.authorJauffrais, Thierry
dc.contributor.authorBernhard, Joan M.
dc.contributor.authorFilipsson, Helena L.
dc.contributor.authorSchmidt, Christiane
dc.contributor.authorRoberge, Helene
dc.contributor.authorMaire, Olivier
dc.contributor.authorPanieri, Giuliana
dc.contributor.authorGeslin, Emmanuelle
dc.contributor.authorMeibom, Anders
dc.date.accessioned2022-08-10T09:50:23Z
dc.date.available2022-08-10T09:50:23Z
dc.date.issued2022-07-20
dc.description.abstractNitrogen 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 <sup>15</sup>N-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 <sup>15</sup>N and <sup>34</sup>S-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.en_US
dc.identifier.citationLeKieffre C, Jauffrais T, Bernhard JM, Filipsson HL, Schmidt C, Roberge H, Maire, Panieri G, Geslin E, Meibom. Ammonium and Sulfate Assimilation Is Widespread in Benthic Foraminifera. Frontiers in Marine Science. 2022;9en_US
dc.identifier.cristinIDFRIDAID 2039509
dc.identifier.doi10.3389/fmars.2022.861945
dc.identifier.issn2296-7745
dc.identifier.urihttps://hdl.handle.net/10037/26065
dc.language.isoengen_US
dc.publisherFrontiers Mediaen_US
dc.relation.journalFrontiers in Marine Science
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleAmmonium and Sulfate Assimilation Is Widespread in Benthic Foraminiferaen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record