Discrepancies between estimates of oceanic N 2 fixation and nitrogen (N) losses through
denitrification have focused research on identifying N 2-fixing cyanobacteria and quantifying …

Approximately 50% of the global natural fixation of nitrogen occurs in the oceans supporting
a considerable part of the new primary production. Virtually all nitrogen fixation in the ocean …

Marine diazotrophs convert dinitrogen (N 2) gas into bioavailable nitrogen (N), supporting
life in the global ocean. In 2012, the first version of the global oceanic diazotroph database …

Marine N2 fixation supports a significant portion of oceanic primary production by making N2
bioavailable to planktonic communities, in the process influencing atmosphere-ocean …

Resolution of the nitrogen (N) cycle in the marine environment requires an accurate
assessment of dinitrogen (N2) fixation. We present here an update on progress in …

Infrared gas phase spectroscopy is becoming very common in many life science
applications. Here we present three types of trace gas detection systems based on CO 2 …

The elemental stoichiometry of sea water and particulate organic matter is remarkably
similar. This observation led Redfield to hypothesize that the oceanic ratio of nitrate to …

In addition to the cyanobacterial N2-fixers (diazotrophs), there is a high nifH gene diversity of
non-cyanobacterial groups present in marine environments, yet quantitative information …

The globally distributed colonial cyanobacterium Trichodesmium and unicellular
diazotrophs including Crocosphaera together carry out the majority of marine biological …

The recent detection of heterotrophic nitrogen (N2) fixation in deep waters of the southern
Californian and Peruvian OMZ questions our current understanding of marine N2 fixation as …