A central feature of the European Water Framework Directive are the reference conditions. The ecological quality status is determined by calculating the distance between the present situation and the reference conditions. To describe reference conditions the natural variation of biota in pristine wa
Dit rapport bevat de resultaten van een literatuuronderzoek naar methoden van dispersie voor aquatische organismen. Het behandelt zowel passieve als actieve vormen van dispersie. Het blijkt dat aquatische organismen zich op veel verschillende manieren kunnen verspreiden, over verschillende afstanden
The EU Water Framework Directive uses abiotic variables for classifying streams and rivers into types. For rivers, the EU Water Framework Directive fixed typology i.e. `System A¿ typology are defined by ecoregions, size based on the catchment area, catchment geology and altitude. Within any given pa
Despite the widespread application of periphytic diatoms to water quality assessment at a regional level, there is no standard European sampling protocol or associated assessment metrics. Furthermore, relatively little is known about the uncertainty in the results of such assessments. One of the obj
This short paper summarises the information developed in the EU funded research project STAR on autecology databases, metrics, multimetrics and community approaches. For Europe the WFD implementation gave an important stimulus for the development of ecology based assessment techniques. Along with th
STAR is a European Commission Framework V project (EVK1-CT-2001-00089). The project aim is to provide practical advice and solutions with regard to many of the issues associated with the Water Framework Directive. This paper provides a context for the STAR research programme through a review of the
The aim of this study was to test the effect of the Water Framework Directive typology descriptors on a macroinvertebrate-based stream typology, the use of reference sites in comparison to the use of degraded sites, and both degraded and reference sites. The EU research projects AQEM and STAR provid
In the EU water framework directive (WFD) a typological framework is defined for assessing the ecological quality of water bodies in the future. The aim of this study was to test the effect of data composition and taxonomic resolution on this typology. The EU research projects AQEM and STAR provided
Go to page top
Go back to contents
Go back to site navigation