Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
(A) δ15N and δ18O profiles of pore water NO3− in the sediment core #AB11 taken from the Challenger Deep, the Mariana Trench. (B) The relationship between pore water nitrate δ15N and δ18O values. In comparisons, based on experimental results, fractionation lines constraining changes in nitrate δ15N and δ18O values during nitrate reduction were plotted (slopes 18ɛ/15ɛ=1) (14, 16).
