Theoretical and practical aspects on benthic quality assessment according to the EU-Water Framework Directive – Examples from Swedish waters |
| |
| Authors: | Kjell Leonardsson Mats Blomqvist Rutger Rosenberg |
| |
| Institution: | aDepartment of Wildlife, Fish and Environmental studies, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden;bHafok AB, SE-179 61 Stenhamra, Sweden;cDepartment of Marine Ecology, University of Gothenburg, Kristineberg 566, SE-450 34 Fiskebäckskil, Sweden |
| |
| Abstract: | A previously presented objective method to calculate each species sensitivity to disturbance is here slightly modified and implemented in the Benthic Quality Index (BQI) for marine benthic invertebrates. A framework for assessment of water bodies based on multi-site BQI-values is also presented, where a certain variation of BQI-values is allowed to cover the heterogeneity within each water body. The 20th percentile, using bootstrapping, from the available sites’ BQI-values is compared with the status boundaries for quality assessment. The reliability of the assessment depends on the background information available for the boundary setting as well as the number of sampling sites included in the assessment. Agreement between time series of quality assessments in areas with known changes in anthropogenic disturbances is encouraging. Problems associated with water body assessment based on few or no samples, as well as multiple sampling occasions during the 6-yr WFD cycle are discussed. |
| |
| Keywords: | Baltic Sea Benthic quality assessment EU-Water Framework Directive Kattegat Pollution Skagerrak |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
