Biotope mapping Gesäuse — Part report mapping area caderal dump ditch

The biotope mapping was carried out on a scale of 1:2,000 from a minimum biotope size of 100 m with a minimum biotope width of 5 m. As mapping units, the biotopes were according to the “Red List of Endangered Biotope Types of Austria” (ESSL et al. 2002, 2004 & in Vorb.; Traxler et al. 2005) used. The images were documented in a survey sheet based on the biotope mapping Salzburg (NOWOTNY & Hinterstoisser 1994) and managed in an MS Access database. Biotopes that could be assigned to an endangered biotope type and/or habitat type according to the Habitats Directive (FFH-LRT according to Directive 92/43/EEC) were additionally documented with a list of species. Furthermore, the biotopes were digitally separated from colour orthophotos. The extensive terrain surveys took place in 2006. The taxonomy depends on FISCHER et al. 2005, the syntaxonomy according to WILLNER & Grabherr 2007, Grabherr & MUCINA 1993 and MUCINA, Grabherr & Wallnöfer 1993, supplemented by WILLNER 2001. Ellmauer was used to address the FFH habitats in 2005. In the UG Kaderalbschüttgraben 27 biotopes were mapped, which were detected on 93 individual areas (highly increased number of individual areas due to vegetation mosaic on the dolomite). Biotopes, which are only partially within the study area, have been mapped out flat. As a result, the entire mapping area increased by about half from 21 ha to 32.9 ha. The surface sizes of the individual biotopes range from 57 m (mosaic of lats, rock crevice and rock band vegetation) to 7 ha (red tube stock at the southern trenches).