Evidence for complete denitrification in a benthic foraminifer

Nils Risgaard-Petersen (), Alexandra M. Langezaal, Signe Ingvardsen, Markus C. Schmid, Mike S. M. Jetten, Huub J. M. Op den Camp, Jan W. M. Derksen, Elisa Piña-Ochoa, Susanne P. Eriksson, Lars Peter Nielsen, Niels Peter Revsbech, Tomas Cedhagen and Gijsbert J. van der Zwaan
Additional contact information
Nils Risgaard-Petersen: National Environmental Research Institute
Alexandra M. Langezaal: Faculty of Geosciences
Signe Ingvardsen: University of Aarhus
Markus C. Schmid: Department of Microbiology
Mike S. M. Jetten: Department of Microbiology
Huub J. M. Op den Camp: Department of Microbiology
Jan W. M. Derksen: Radboud University Nijmegen
Elisa Piña-Ochoa: Centre of Environmental Sciences
Susanne P. Eriksson: Kristineberg Marine Research Station, Göteborg University
Lars Peter Nielsen: University of Aarhus
Niels Peter Revsbech: University of Aarhus
Tomas Cedhagen: University of Aarhus
Gijsbert J. van der Zwaan: Faculty of Geosciences

Nature, 2006, vol. 443, issue 7107, 93-96

Abstract: Living without oxygen Several foraminiferal protozoa species grow in anoxic zones in marine sediment, but the type of anaerobic respiration that sustains them was not known. These organisms have now been found to accumulate nitrate intracellularly at concentrations more than 500 times the environmental values. The nitrate substitutes for oxygen in these anoxic habitats. The large amounts of nitrate that accumulate may even allow them to 'hold their breath' for more than a month.

Date: 2006
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DOI: 10.1038/nature05070

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