Romain Darnajoux
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View article: Nitrous oxide emissions in natural and managed wetlands across Europe
Nitrous oxide emissions in natural and managed wetlands across Europe Open
Wetlands play a complex role as both sources of greenhouse gases (GHGs) and carbon sinks, making it essential to understand their dynamics and effects on biodiversity. The increasing pressures from climate change and human activities can d…
View article: A New Method to Investigate Denitrification Dynamics During Simulated Floods in Soils
A New Method to Investigate Denitrification Dynamics During Simulated Floods in Soils Open
Riparian ecosystems, through their anoxic properties driven by floods, play a crucial role in favouring denitrification. The absence of nitrous oxide (N 2 O) reductase activity in the denitrification process provokes the emission of a pote…
View article: A thallus-forming N-fixing fungus-cyanobacterium symbiosis from subtropical forests
A thallus-forming N-fixing fungus-cyanobacterium symbiosis from subtropical forests Open
Fungi engage in diverse symbiotic relationships with phototrophs. Lichens, symbiotic complexes involving fungi and either cyanobacteria, green algae, or both, have fungi forming the external layer and much of the interior. We found an erec…
View article: A genomic view of environmental and life history controls on microbial nitrogen acquisition strategies
A genomic view of environmental and life history controls on microbial nitrogen acquisition strategies Open
Microorganisms have evolved diverse strategies to acquire the vital element nitrogen (N) from the environment. Ecological and physiological controls on the distribution of these strategies among microbes remain unclear. In this study, we e…
View article: A Genomic View of Environmental and Life History Controls on Microbial Nitrogen Acquisition Strategies
A Genomic View of Environmental and Life History Controls on Microbial Nitrogen Acquisition Strategies Open
Microorganisms have evolved diverse strategies to acquire the vital element nitrogen (N) from the environment. Ecological and physiological controls on the distribution of these strategies among microbes remain unclear. Here we examine the…
View article: Repository_Darnajoux et al_2023_CSBJ
Repository_Darnajoux et al_2023_CSBJ Open
This document is a repository of all the code and dataset used for the article “A Diazotrophy-Ammoniotrophy Dual Growth Model for the sulfate-reducing bacteria Desulfovibrio vulgaris var. Hildenborough” by Darnajoux R., Inomura, K., & Zhan…
View article: Quantification of biological nitrogen fixation by Mo-independent complementary nitrogenases in environmental samples with low nitrogen fixation activity
Quantification of biological nitrogen fixation by Mo-independent complementary nitrogenases in environmental samples with low nitrogen fixation activity Open
Biological nitrogen fixation (BNF) by canonical molybdenum and complementary vanadium, and iron-only nitrogenase isoforms is the primary natural source of newly fixed nitrogen. Understanding controls on global nitrogen cycling requires kno…
View article: Ammonium Sensitivity of Biological Nitrogen Fixation by Anaerobic Diazotrophs in Cultures and Benthic Marine Sediments
Ammonium Sensitivity of Biological Nitrogen Fixation by Anaerobic Diazotrophs in Cultures and Benthic Marine Sediments Open
New bioavailable nitrogen (N) from biological nitrogen fixation (BNF) is critical for the N budget and productivity of marine ecosystems. Nitrogen‐fixing organisms typically inactivate BNF when less metabolically costly N sources, like amm…
View article: Ammonium sensitivity of biological nitrogen fixation by anaerobic diazotrophs in cultures and benthic marine sediments.
Ammonium sensitivity of biological nitrogen fixation by anaerobic diazotrophs in cultures and benthic marine sediments. Open
<p>Biological nitrogen fixation (BNF) is a critical process for the N budget and productivity of marine ecosystems. Nitrogen-fixing organisms typically turn off BNF when less metabolically costly N sources, like ammonium (NH<sub&g…
View article: Methodological and analytical improvement of the ISotopic Acetylene Reduction Assay for the assessment of complementary biological nitrogen fixation in low activity samples
Methodological and analytical improvement of the ISotopic Acetylene Reduction Assay for the assessment of complementary biological nitrogen fixation in low activity samples Open
<p>Understanding the enzymes responsible for biological nitrogen fixation in the natural environment is crucial for understanding the global nitrogen cycle. The isotopic acetylene reduction assay (ISARA) is currently one of the only …
View article: Repository_Darnajoux et al_2022_JGR_BGC
Repository_Darnajoux et al_2022_JGR_BGC Open
These files represent the full dataset and the R code to reproduce the Figure and Supplementary Figure from the article "Ammonium sensitivity of biological nitrogen fixation in sulfate-reducing diazotrophs and coastal salt marsh sediments"…
View article: Ammonium sensitivity of biological nitrogen fixation in anaerobic diazotrophs and coastal salt marsh sediments
Ammonium sensitivity of biological nitrogen fixation in anaerobic diazotrophs and coastal salt marsh sediments Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Journal of Geophysical Research - Biogeosciences. ESSOAr is a venue for early communication or feedback before peer review. Data may be …
View article: Ecosystem scale evidence for the contribution of vanadium-based nitrogenase to biological nitrogen fixation.&#160;
Ecosystem scale evidence for the contribution of vanadium-based nitrogenase to biological nitrogen fixation.  Open
<p>Nitrogen is the primary limiting nutrient in high latitude ecosystems. Biological nitrogen fixation (BNF) by microorganisms associated with cryptogamic covers, such as cyanolichens and bryophytes, is an important source of new rea…
View article: Quantification of Moss-Associated Cyanobacteria Using Phycocyanin Pigment Extraction
Quantification of Moss-Associated Cyanobacteria Using Phycocyanin Pigment Extraction Open
In the boreal forest, cyanobacteria can establish associations with feather moss and realize the biological nitrogen fixation (BNF) reaction, consisting in the reduction of atmospheric dinitrogen into bioavailable ammonium. In this ecosyst…
View article: The fixed nitrogen sensitivity of biological nitrogen fixation in salt marshes sediments from the northeastern United States
The fixed nitrogen sensitivity of biological nitrogen fixation in salt marshes sediments from the northeastern United States Open
<p>Biological nitrogen fixation, the main input of fixed N into ecosystems, converts inert N<sub>2</sub> gas into bioavailable ammonium in an energetically costly reaction catalyzed by the prokaryotic metalloenzyme nitrog…
View article: Ecosystem scale evidence for the contribution of vanadium-based nitrogenase to biological nitrogen fixation
Ecosystem scale evidence for the contribution of vanadium-based nitrogenase to biological nitrogen fixation Open
<p>Nitrogen is the primary limiting nutrient in high latitude ecosystems. Biological nitrogen fixation (BNF) by microorganisms associated with cryptogamic covers, such as cyanolichens and bryophytes, is an important source of new rea…
View article: Molybdenum threshold for ecosystem scale alternative vanadium nitrogenase activity in boreal forests
Molybdenum threshold for ecosystem scale alternative vanadium nitrogenase activity in boreal forests Open
Biological nitrogen fixation (BNF) by microorganisms associated with cryptogamic covers, such as cyanolichens and bryophytes, is a primary source of fixed nitrogen in pristine, high-latitude ecosystems. On land, low molybdenum (Mo) availab…
View article: Biological nitrogen fixation by alternative nitrogenases in boreal cyanolichens: importance of molybdenum availability and implications for current biological nitrogen fixation estimates
Biological nitrogen fixation by alternative nitrogenases in boreal cyanolichens: importance of molybdenum availability and implications for current biological nitrogen fixation estimates Open
Summary Cryptogamic species and their associated cyanobacteria have attracted the attention of biogeochemists because of their critical roles in the nitrogen cycle through symbiotic and asymbiotic biological fixation of nitrogen ( BNF ). B…