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Degradation of organic phosphorus compounds in anoxic Baltic Sea sediments: A 31P nuclear magnetic resonance study
Author(s) -
Ahlgren Joakim,
Reitzel Kasper,
Tranvik Lars,
Gogoll Adolf,
Rydin Emil
Publication year - 2006
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.2006.51.5.2341
Subject(s) - sediment , anoxic waters , pyrophosphate , phosphorus , environmental chemistry , teichoic acid , baltic sea , phosphate , chemistry , ethylenediaminetetraacetic acid , geology , oceanography , inorganic chemistry , chelation , biochemistry , organic chemistry , paleontology , peptidoglycan , enzyme
The composition and abundance of phosphorus extracted by NaOH‐ethylenediaminetetraacetic acid from anoxic Northwest Baltic Sea sediment was characterized and quantified using solution 31 P nuclear magnetic resonance. Extracts from sediment depths down to 55 cm, representing 85 yr of deposition, contained 18.5 g m ‐2 orthophosphate. Orthophosphate monoesters, teichoic acid P, microbial P lipids, DNA P, and pyrophosphate corresponded to 6.7, 0.3, 1.1, 3.0, and 0.03 g P m ‐2 , respectively. The degradability of these compound groups was estimated by their decline in concentration with sediment depth. Pyrophosphate had the shortest half‐life (3 yr), followed by microbial P lipids with a half‐life of 5 yr, DNA P (8 yr), and orthophosphate monoesters (16 yr). No decline in concentration with sediment depth was observed for orthophosphate or teichoic acid P.