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The key feature of the European Water Framework Directive (EU-WFD) is the measurement of water quality with respect to ecological categories, e. g. in terms of community structure and functioning of natural ecosystems. Among other quality elements, the future water quality assessment of coastal waters requires consideration of the phytoplankton community in(More)
A classification system of macroalgae and angiosperms for the inner and outer coastal waters of the German Baltic coast was developed according to the guidelines of the European Water Framework Directive. These guidelines ask for a five step classification scheme (high, good, moderate, poor, bad) of the ecological state based on submerged macrophytes. For(More)
The German procedure for the assessment of ecological status in relation to the biological quality element "Macroalgae & Angiosperms" pursuant to the European Water Framework Directive (WFD) for inner coastal waters of the Baltic Sea
A comprehensive expert consultation was conducted in order to assess the status, trends and the most important drivers of change in the abundance and geographical distribution of kelp forests in European waters. This consultation included an on-line questionnaire, results from a workshop and data provided by a selected group of experts working on kelp(More)
Species composition and abundance of macroalgae are classification components for coastal water bodies according to the European Water Framework Directive. The German classification approach integrated the presence and biomass of reference species and opportunistic algae. Along the salinity gradient on the German Baltic coast the distribution and biomass of(More)
The bladder wrack Fucus vesiculosus, common all over the Baltic, serves as an indicator species in the ecological classification schemes (EU-Water Framework Directive) of all Baltic Sea countries. Therefore, its distribution became regularly monitored in the last years. At the German Baltic coast, a drastic change in depth distribution of F. vesiculosus was(More)
Dinoflagellates readily use diverse inorganic and organic compounds as nitrogen sources, which is advantageous in eutrophied coastal areas exposed to high loads of anthropogenic nutrients, e.g., urea, one of the most abundant organic nitrogen substrates in seawater. Cell-to-cell variability in nutritional physiology can further enhance the diversity of(More)
The aim of the EU Water Framework Directive is the " good ecological status " of all water bodies in 2015. Reasons and effects of degradation of the coastal waters are well known, but the knowledge about management activities to reverse the actual impact in a reliably short period is less well established. The major problem of coastal waters is their(More)