Ontology highlight
ABSTRACT:
SUBMITTER: Colman AS
PROVIDER: S-EPMC1201620 | biostudies-other | 2005 Sep
REPOSITORIES: biostudies-other
Colman Albert S AS Blake Ruth E RE Karl David M DM Fogel Marilyn L ML Turekian Karl K KK
Proceedings of the National Academy of Sciences of the United States of America 20050902 37
We show that the isotopic composition of oxygen (delta18O) in dissolved inorganic phosphate (Pi) reveals the balance between Pi transport and biological turnover rates in marine ecosystems. Our delta18Op of Pi (delta18Op) measurements herein indicate the importance of cell lysis in the regeneration of Pi in the euphotic zone. Depth profiles of the delta18Op in the Atlantic and Pacific Oceans are near a temperature-dependent isotopic equilibrium with water. Small deviations from equilibrium below ...[more]