Do the Austrian blackfly fauna (Diptera: Simuliidae) support the typological approach of the EU water framework directive? |
| |
| Authors: | Thomas Ofenbck Otto Moog Manfred Car |
| |
| Institution: | 1University of Agricultural Sciences, Institute of Water Provision, Water Ecology and Waste Management, Department of Hydrobiology, Vienna, Austria;2Institut für wissenschaftliche Analyse, Brunn am Gebirge, Austria |
| |
| Abstract: | The Austrian blackfly fauna were analysed with regard to spatial (ecoregions, bioregions), vertical (altitude classes) and longitudinal zonation characteristics stream order, biocoenotic (= fish) regions] on the basis of 2600 investigation sites. Of a total of 45 species recorded, Simulium ornatum, S. variegatum, S. argyreatum and S. reptans are the most common and most frequently distributed species, occurring in 60% of the investigated sites. Although the Austrian blackfly fauna seem to be quite well documented (on average one investigation site per 32 km2) the jackknife analyses indicates that there are still some fauna deficits. Whereas the species diversity of the main ecoregions is quite similar, the number of species differs clearly between the bioregions. Within the typological context of the Water Framework Directive, the Austrian Simuliidae confirm the bioregions as the most useful spatial units for river typology. A further optimisation in predicting a target list of blackfly species of a site can be achieved by subdividing the bioregions into either catchment area and altitude classes or into longitudinal zonation types (biocoenotic regions). |
| |
| Keywords: | Austria bioregions ecoregions EU water framework directive longitudinal zonation rivers Simuliidae |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
