Mean total phosphorus recovery potential [kg].
Mean total phosphorus concentration in E. nuttallii (TPmean).
Referring to the mean total phosphorus recovery potential (TPpot,mean) amounting to 796.9 kg, the average deficit of the examined ecofarms of 7 kg P/(ha*year) could be covered for about 114 ha (Table 5).
Phosphate levels in water are regulated by the EU through the Urban Waste Water Treatment Directive (annual mean total phosphorus concentrations of 1 2 mg/l) and the Water Framework Directive that will enforce "good ecological and chemical status" by 2015.
Analysis of the crude deposits gave mean Ca concentration of 318 mg g−1 dry wt., and mean total P concentration of 169.8 μg g−1 dry wt, however, only 38% of this total phosphorus was composed of chemical species specifically associated with Ca co-precipitation.
While monitoring of filter response is commonly based on an event mean of total phosphorus (TP), this study examines the fate of specific P fractions through intra- and inter-event phenomena.
Amendments in the DARK experiment increased mean dissolved inorganic nitrogen (DIN) levels from 4.2 µmol L−1 to 15.9 µmol L−1 and mean soluble reactive phosphate (SRP) levels from 0.04 µmol L−1 to 1.6 µmol L−1, altering mean starting DIN:total phosphorus (DIN TP) molar ratios to 2.7, 161, and 59 for P, N, and Control treatments respectively.
A mean proportion of 11.5% total phosphorus (TP) in the PM changed abruptly with the facies to a mean value of only 0.9% in the OSM and the MM.
For each coastal ecosystem (n = 28) within the four regions, annual means of total nitrogen (TN), total phosphorus (TP), and Chla were computed from a general linear model(9) after employing a log-transformation to normalize the concentrations.
Mean Euclidean nearest neighbor index defined ammoniacal nitrogen, orthophosphate, and total phosphorus during the dry season.
Small but statistically significant reductions in event mean concentrations occurred: 17% total suspended sediment (TSS), 17% total phosphorus (TP), and 3% total nitrogen (TN).
