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 is an essential nutrient for all life on Earth and it acts as a major control on
biological productivity in the modern ocean. Accurate reconstructions of the evolution of life …

Ecogeochemistry—the application of geochemical techniques to fundamental questions in
population and community ecology—has been used in animal migration studies in terrestrial …

Oxygen minimum zones are expanding globally, and at present account for around 20–40%
of oceanic nitrogen loss. Heterotrophic denitrification and anammox—anaerobic ammonium …

A proxy system model may be defined as the complete set of forward and mechanistic
processes by which the response of a sensor to environmental forcing is recorded and …

Natural‐abundance stable isotope ratios provide a wealth of ecological information relating
to food web structure, trophic level, and location. The correct interpretation of stable isotope …

Nitrogen isotopes are an important tool for evaluating past biogeochemical cycling from the
paleoceanographic record. However, bulk sedimentary nitrogen isotope ratios, which can be …

Abstract Earth System models (ESMs) are global climate models with the added capability to
explicitly represent biogeochemical processes that interact with the physical climate and so …

The isotopic composition of nitrous oxide (N2O) provides useful information for evaluating
N2O sources and budgets. Due to the co‐occurrence of multiple N2O transformation …

Zinc (Zn) is a key micronutrient for marine phytoplankton, with a global distribution that is
similar to silicic acid. The processes that govern this relationship, despite the very different …