Comparison of two models in the estimation of nitrogen uptake rates using data from 15-N incubation experiments

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dc.contributor.authorTungaraza, Clavery
dc.contributor.authorBrion, Natacha
dc.contributor.authorBaeyens, Willy
dc.date.accessioned2023-04-12T07:23:27Z
dc.date.available2023-04-12T07:23:27Z
dc.date.issued2005-08-16
dc.descriptionMain articleen_US
dc.description.abstractThis paper compares two uptake rate models, Dugdale & Goering’s (D&G) model and Elskens’ model. The aim is to provide an insight into how estimates of uptake processes, i.e. regeneration and loss rates from both dissolved and particulate nitrogen pools, influence the total uptake rates when the two models are compared. The uptake rates of three nitrogenous nutrients (nitrate, ammonium and urea) from 15-N incubation experimental data were compared. The comparison indicated that the D&G model underestimated nitrate uptake rates by about 34%, implying a significant regeneration and loss rates of the nutrient. Elskens’ model further showed that the loss rates from the dissolved phase were about 40% and 25% for the ammonium and urea pools, respectively, indicating that the D&G model underestimated the experimental uptake rates of the nutrients. On average, nitrification made up about 30% of the total ammonium uptake flux, whereas the sinks from particulate nitrogen and dissolved nitrogen were estimated at 36% and 56%, respectively. The D&G model sometimes overestimated the f -ratio values to about 60% and higher as a result of ammonium and urea uptake rates underestimation. This paper also shows that detritus adsorption, bacterial uptake and cell lysis are equally important processes.en_US
dc.description.sponsorshipthe EC research programme COMWEB (Comparative Analysis of Food Webs Based on Flow Network) and the Belgian national research programme (CT960052) Sustainable Management of the North Seaen_US
dc.identifier.urihttp://www.suaire.sua.ac.tz/handle/123456789/5180
dc.language.isoenen_US
dc.publishernstitute of Oceanology PASen_US
dc.relation.ispartofseriesOceanologia, 47 (3), 2005. pp. 387 – 403.;
dc.subjectModel validityen_US
dc.subjectNitrogenous nutrientsen_US
dc.subjectUptake ratesen_US
dc.titleComparison of two models in the estimation of nitrogen uptake rates using data from 15-N incubation experimentsen_US
dc.typeArticleen_US
dc.urlhttp://www.iopan.gda.pl/oceanologia/en_US

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