Over het archief
Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.
Dit archief wordt uitgebouwd en beheerd volgens de principes van de Open Access Movement, en het daaruit ontstane Open Archives Initiative.
Basisinformatie over ‘Open Access to scholarly information'.
d15N dynamics of ammonium and particulate nitrogen in a temperate eutrophic estuary
De Brabandere, L.; Brion, N.; Elskens, M.; Baeyens, W.; Dehairs, F. (2007). d15N dynamics of ammonium and particulate nitrogen in a temperate eutrophic estuary. Biogeochemistry 82(1): 1-14. http://dx.doi.org/10.1007/s10533-006-9047-1
In: Biogeochemistry. Springer: Dordrecht; Lancaster; Boston. ISSN 0168-2563; e-ISSN 1573-515X, meer
|   |
| Trefwoorden |
|
| Author keywords |
Ammonium, Fractionation, Scheldt estuary, Stable isotopes |
| Abstract |
We monitored the stable nitrogen isotopic composition (d15N) of suspended matter and ammonium in the freshwater stretch of the Scheldt estuary (Belgium) over a full year to investigate for seasonal evolution and possible co-variation between isotopic signatures. The d15N value of ammonium remained rather constant during winter (average = +11.4‰) but increased significantly with the spring and summer bloom, reaching values as high as +70‰. This enrichment of the ammonium pool in 15N coincided with significant ammonium depletion during summer period, suggesting a close causal relationship. Based on a semi-closed system approach we deduced an apparent fractionation factor associated with NH4+ utilization (i.e. combining effects of uptake and nitrification) of 18.4‰ (SE = 2.0‰), which is similar to values reported in literature. Observed variations of ammonium d15N could account for about 69% of d15N variation in suspended matter. |
IMIS is ontwikkeld en wordt gehost door het VLIZ.
