The nitrogen (N) cycle involves a set of N compounds transformed by plants and microbes.
Some of these N compounds, such as nitrous oxide (N 2 O) or nitrate (NO 3−), are …

Nitrogen isotope compositions in sedimentary rocks (d 15 N sed) are routinely used for
reconstructing Cenozoic N-biogeochemical cycling and are also being increasingly applied …

Biological nitrogen fixation constitutes the main input of fixed nitrogen to Earth's ecosystems,
and its isotope effect is a key parameter in isotope-based interpretations of the N cycle. The …

We present nearly 9 yrs (June 2005–December 2013) of measurements of upper‐ocean (0
m to 125 m) dinitrogen (N2) fixation rates, coupled with particulate nitrogen (PN) export at …

The Mesozoic is marked by several widespread occurrences of intense organic matter
burial. Sediments from the largest of these events, the Cenomanian–Turonian Oceanic …

Riparian zones are important buffer zones for streams as they are hotspots of nitrate
transformation and removal in agricultural catchments. However, mixing of water from …

The composition of microbial communities and their relationship to ocean redox structure in
the Precambrian are topics of continuing interest in geobiology. Our knowledge of …

Dissimilatory nitrate reduction (DNR) to nitrite is the first step in denitrification, the main
process through which bioavailable nitrogen is removed from ecosystems. DNR is catalyzed …

Abstract Middle-to-late Ediacaran (575–541 Ma) marine sedimentary rocks record the first
appearance of macroscopic, multicellular body fossils, yet little is known about the …

Quantifying net N2 flux, the balance between nitrogen (N) fixation and denitrification, may
help inform the decades-long debate about the significance of N relative to phosphorus (P) …