Biotope mapping Gesäuse — Part report mapping area Enns

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 Enns study area, 329 biotopes were mapped, which were detected on 457 individual areas. Biotopes, which are only partially within the UG, have been mapped out flat. Due to the unambiguous limitation of the UG by railway line or road over the majority of the area, the actual mapped area increased only to the west of the railway bridge, thus in the area Gesäuse Entrance and before it. The total mapping area increased by 12 % from 179.57 ha to 200.44 ha. The area sizes of the individual biotopes range from 30 m (Lavendelweidenau with Grauerle at Ennssteg) to 16.3 ha (uniform section of the Enns central in the Gesäuse).本研究以1:2000的比例尺开展生境（biotope）制图，设定最小生境尺寸阈值为100平方米、最小生境宽度为5米。制图单元采用《奥地利濒危生境类型红色名录》（ESSL等，2002、2004及待刊成果；Traxler等，2005）中的分类体系。相关影像依据萨尔茨堡生境制图规范（NOWOTNY与Hinterstoisser，1994）录入调查记录表，并在Microsoft Access（MS Access）数据库中进行管理。符合《生境指令》（欧盟92/43/EEC指令规定的FFH-LRT）中濒危生境类型和/或栖息地类型的生境，还需额外附带物种类列表进行记录。此外，研究通过彩色正射影像完成生境的数字化勾绘。全面的野外调查工作于2006年完成。 本研究的分类学依据FISCHER等（2005）的成果，群落分类学（syntaxonomy）采用WILLNER与GRABHERR（2007）、GRABHERR与MUCINA（1993）以及MUCINA、GRABHERR与WALLNÖFER（1993）的分类体系，并补充了WILLNER（2001）的相关内容。2005年采用ELLMAUER的方法对FFH栖息地进行界定。 在恩斯（Enns）研究区域内，共完成329处生境的制图，这些生境分布于457个独立地块中。仅部分位于UG范围内的生境，按完整地块进行制图。由于UG区域的大部分边界由铁路或公路明确界定，实际制图范围仅在铁路桥西侧，即盖塞山口（Gesäuse Entrance）及其东侧区域有所扩展。总制图面积从179.57公顷增加至200.44公顷，增幅达12%。单个生境的面积范围为30平方米（恩斯桥处伴生灰桤木的薰衣草河畔草地）至16.3公顷（盖塞峡谷内恩斯河中段的均匀生境段）。