| Water category: | River |
| Pressure categories |
Nutrients
|
| Pressure detail |
Dissolved Inorganic Phosphorus |
| WFD Indicators- R |
Abundance
|
| Specific Index |
|
| Brief text description |
On fined grained sediments, the dissolved inorganic phosphorus explaines 61% of the variation of the peak algal biomass of phytobenthos. |
| Long text description |
On fine grained sediments, the dissolved inorganic phosphorus explains 61% of the variation of the peak algal biomass of phytobenthos, according to the following equation: Y=929.3.x/(49.2+x) (r2=0.61), with Y the maximum biomass (mg chlorophyll.m-2) and x the dis-solved inorganic phosphorus (ėg P.L-1, 1 - 273 ėg P.L-1). However, it has been applied only to streams where the hydrological conditions were stable. And it only applies to sites with fine-grained sediments: no significant correlation between the peak algal biomass and the dissolved inorganic phosphorus concentration was found on rocky substrata.
Source data from 10 Danish lowland streams over 5 years. Particularly on fine grained sediment. |
| History of development |
|
| References |
Kjeldsen, K. (1994) The relationship between phosphorus and peak biomass of benthic algae in small low-land streams. Verhandlungen der Internationalen Vereinigung fur Theoretische und Angewandte Limnologie. 25:1530-1533 |
| Geographical region (GIG) - R |
|
| Ecoregion - LR |
|
| Country |
DK Denmark
|
| Geographical location of source data |
National |
| Reference conditions |
Unknown |
| Development |
Existing |
| Uncertainty |
Unknown |
| Link to document store |
No |
| BMW Toolbox |
No |
| Entry status |
Unvalidated |