Nitrogen fractionation has also been used to distinguish trophic levels in migratory fish in fresh and marine environments (Hobson & Wassenaar 2008). Oxygen was the first stable isotope used to ...

These unique networks provide Member States access to global and regional data sets on water isotopes (oxygen-18, deuterium and tritium) and related mapping products. These widely used data sets are ...

Isotopes are varieties of the same element that differ only in the weight of their nucleus. The team used an improved version of laser fluorination, a method in which oxygen is released from rock ...