Distribution of neophytes along the Enns in the Gesäuse and recommendation for action

During the course of the course in 2006, the sites of the neophytes Fallopia japonica, Impatiens glandulifera, Impatiens parviflora, Solidago canadensis and Solidago gigantea were mapped along the Enns in the Gesäuse. In the course of the diploma thesis the recorded parameters were processed and evaluated digitally. In addition, an ArcGis project was created in which the sites of the deposits are projected and the desired information can be retrieved. For an overview and illustration, a distribution map with the current neophyte vegetation 2006 was created. The protection objectives of the investigation area require action to be taken, as mainly large, dense, rejuvenating neophytes in protected habitats can displace or influence the local flora and fauna. This applies in particular to areas with increased neophytes, but also numerous impetatiens glandulifera stocks in the investigation area. Although measures are necessary on these areas, they are neither consistent with goals nor sustainable. In particular, the semen supply of neophyte stocks above the study area and the large size of the established herds give rise to an absurdity in taking measures. On the other hand, the fight against Fallopia japonica and measures in the Haselau were considered possible. Fallopia japonica colonises only a few sites in the investigation area, the neophyte is not (yet) established in the Gesäuse. However, because an invasive character of the species is known, early, preventive action seems useful. The Haselau lies in the middle of a relatively neophyte-poor section of the river; clear neophyte stocks can be found. A control would not be hopeless, especially since the Haselau contains various FFH habitats and the most vital shore-riding grass stock (highly endangered in Styria) in the study area. In addition to monitoring the success of the sites with action taking measures, an inventory control and permanent monitoring, especially for basic scientific research, appears to be necessary. The developed monitoring concept therefore covers two different aspects, which has been followed by different methods. Public relations should take place as an accompanying measure. It is used to prevent repeated anthropogenic application as well as broad opinion formation and involvement in the topic.