Fixed nitrogen is a limiting nutrient in many marine environments. Only a subset of the
microbial community has the ability to fix dinitrogen gas (N 2). Here, we document the …

Nitrogen (N) is an essential element in biological systems and one that often limits
production in both aquatic and terrestrial systems. Due to its requirement in biological …

Traditionally, cyanobacterial activity in oceanic photic layers was considered responsible for
the marine pelagic dinitrogen (N2) fixation. Other potentially N2-fixing bacteria and archaea …

We measured pelagic dinitrogen (N 2) fixation by incorporation of 15 N 2 during regular
cruises over 4 yr to deep hypoxic basins in the Southern California Bight, USA. N 2 fixation …

Dinitrogen (N2) fixation is an integral part of the marine nitrogen cycle and together with N
losses through denitrification and anaerobic ammonia oxidation determines the size of the …

In temperate Atlantic waters (18.8 to 20.1 C), biological nitrogen fixation has been
demonstrated by 2 independent measurements: 15 NN 2 incorporation and nifH …

Recent observations of N2 fixation rates (NFR) and the presence of nitrogenase (nifH)
genes from heterotrophic N2‐fixing (diazotrophic) prokaryotes in unusual habitats challenge …

Marine waters are generally considered to be nitrogen (N) limited and are therefore
favourable environments for diazotrophs, ie organisms converting atmospheric N 2 into …

In contrast to cyanobacteria, the significance of bacteria and archaea in oceanic N 2 fixation
remains unknown, apart from the knowledge that their nitrogenase (nifH) genes are diverse …

Nitrogen (N) fixation is fueling planktonic production in a multitude of aquatic environments.
In meso-and poly-haline estuaries, however, the contribution of N by pelagic N2 fixation is …