| Water category: | River |
| Pressure categories | Acidification |
| Pressure detail | pH limit |
| WFD Indicators- R | Phytoplancton Macrophytes and phytobenthos Composition Abundance |
| Specific Index | |
| Brief text description | Some species increased significantly in acidified rivers, but a large number were never found below pH 6.5. |
| Long text description | Some species seems to profit from acidification and increased significantly in frequency and biomass in markedly acidified rivers (pH < 5.0). On the other hand, a large number of taxa are never found below pH 6.5 and some are even limitedto rivers with pH permanently above 7.0. Different requirements concerning carbon source is probably the main reason for thes differences. The critical limit towards acidification for attached algae in running water is pH 6.3. The algal community, with great probability is impacted if pH is 5.6 or lower. |
| History of development | |
| References | Lindstrøm et al., 2004, Freshwater vegetation in Norway. Tolerance limits to acidification and effects of liming. Norvegian Institute for Water Research, Oslo. Nr. 4821-2004. 125 pp. |
| Geographical region (GIG) - R | |
| Ecoregion - LR | |
| Country | S Sweden |
| Geographical location of source data | |
| Reference conditions | Unknown |
| Development | Existing |
| Uncertainty | Unknown |
| Link to document store | No |
| BMW Toolbox | No |
| Entry status | Unvalidated |