… N cycle: the changing perspective on the N cycle and the microorganisms involved in the
open ocean … minimum zones because of their significance to the N cycle. In recent years, new …

… components of the marine N cycle. Much of our basic information about the N cycle is derived
from … in the open ocean, and essentially all pelagic N fixation was ascribed to two genera of …

… Determinations of NO3 À, NO2 À, and NH4 þ generally employ automated shipboard,
colorimetric assays, although surface waters of open ocean ecosystems demand the use of …

… on the open ocean and the emissions of Nr from the ocean, placing particular emphasis on
stable isotopes as a tool to investigate the surface ocean–lower atmosphere Nr cycle and its …

… We then review what is known about the distribution of N 2 fixation in the ocean, since
this information may shed light on the environmental controls relevant to the long-term …

… of eight major nitrogen transformation processes … OA on nitrogen cycling in the future ocean
by 2100. The following points were identified by our meta-analysis: (a) Diazotrophic nitrogen …

… a major nitrogen-removal process in the ocean … cycle, a picture in which the extant nitrogen
cycle represents a more evolved cycle, cemented by the finding that significant nitrogen-cycle …

… In the oligotrophic open ocean, the major nitrogen-fixing organisms are non-heterocystic
cyanobacteria in the genus Trichodesmium". That there are no heterocystic marine cyanobac…

… N yr −1 to coastal waters and the open ocean, which together with the 30 Tg input to oceans
… This paper describes the global nitrogen cycle at the beginning of the twenty-first century, …

… keep the nitrogen cycle of the oceans in approximate … Nitrogen cycling in ODZs is
fundamentally different from the rest of the open ocean, because only in ODZs can net loss of fixed N …