Biogenic phosphorus in oligotrophic mountain lake sediments: Differences in composition measured with NMR spectroscopy
2006 (English)In: Water Research, ISSN 0043-1354, E-ISSN 1879-2448, Vol. 40, no 20, 3705-3712 p.Article in journal (Refereed) Published
Phosphorus (P) composition in alkaline sediment extracts from three Swedish oligotrophic mountain lakes was investigated using P-31-NMR spectroscopy. Surface sediments from one natural lake and two mature reservoirs, one of which has received nutrient additions over the last 3 years, were compared with respect to biogenic P composition. The results show significant differences in the occurrence of labile and biogenic P species in the sediments of the different systems. The P compound groups that varied most between these three systems were pyrophosphate and polyphosphates, compound groups known to play an important role in sediment P recycling. The content of these compound groups was lowest in the reservoirs and may indicate a coupling between anthropogenic disturbances (i.e., impoundment) to a water system and the availability of labile P species in the sediment. A statistical study was also conducted to determine the accuracy and reliability of using P-31-NMR spectroscopy for quantification of sediment P forms.
Place, publisher, year, edition, pages
2006. Vol. 40, no 20, 3705-3712 p.
phosphorus species, P-31-NMR spectroscopy, reservoirs, oligotrophication, method validation, P-31-NMR accuracy
IdentifiersURN: urn:nbn:se:uu:diva-94215DOI: 10.1016/j.watres.2006.09.006ISI: 000242988600005PubMedID: 17070896OAI: oai:DiVA.org:uu-94215DiVA: diva2:167990