Stable isotope applications have evolved from simple characterizations of isotope
composition in organisms and organic matter, to highly complex methodologies on scales …

The marine nitrogen cycle is a complex web of microbially mediated reactions that control
the inventory, distribution, and speciation of nitrogen in the marine environment. Because …

Nitrous oxide (N2O) is a potent greenhouse gas that contributes to climate change and
stratospheric ozone destruction. Anthropogenic nitrogen (N) loading to river networks is a …

We report a new method for measurement of the isotopic composition of nitrate (NO3-) at the
natural-abundance level in both seawater and freshwater. The method is based on the …

Uncovers the Key Role Microbes Play in the Transformation of Oxidizable and Reducible
MineralsMany areas of geomicrobial processes are receiving serious attention from …

Anthropogenic addition of bioavailable nitrogen to the biosphere is increasing, and
terrestrial ecosystems are becoming increasingly nitrogen-saturated, causing more …

Biogeochemical reactions associated with stream nitrogen cycling, such as nitrification and
denitrification, can be strongly controlled by water and solute residence times in the …

We present a novel method for nitrogen and oxygen natural isotopic abundance analysis of
nitrate and nitrite of seawater and freshwater at environmental concentrations. The method …

The surface water of the marine environment has traditionally been viewed as a nitrogen (N)
limited habitat, and this has guided the development of conceptual biogeochemical models …

Agricultural systems that receive high or low organic matter (OM) inputs would be expected
to differ in soil nitrogen (N) transformation rates and fates of ammonium (NH4+) and nitrate …