Distribution of Oxygen & Nitrogen in Seawater near Peru (image) Helmholtz Centre for Ocean Research Kiel (GEOMAR) Share Print E-Mail Caption Vertical and horizontal distribution of oxygen, nitrogen compounds and iron in seawater in the oxygen minimum zone off Peru. Decreasing concentrations of dissolved iron do not coincide with the occurrence of oxygen but with the increase of dissolved nitrogen compounds. Credit Source: GEOMAR. Usage Restrictions use only in the context of this press release Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.