The biotope mapping of Styria, federal state of Austria, has a long tradition and will provide a database for issues and plannings relevant to spatial development besides the acquisition of biotopes deserving protecting. The last selective mapping was conducted from 2007 to 2013. Change detection based on remote sensing can provide information on possible change in order to facilitate a further revision, and can include or exclude areas for field inspection. This way the expended time and cost for biotope mapping can be reduced. In the course of the thesis, satellite data with medium resolution (Landsat) is analysed for changes. Three types of biotopes serve as database: "Frische Fettwiese der Tieflagen" (fertilized meadow of low-lying areas), "Frische Fettweide der Tieflagen" (fertilized pasture of low-lying areas) und "Frische Grünlandbrache nährstoffreicher Standorte der Tieflagen" (grassland fallow of nutritious sites of low-lying areas), which were provided in digital form by Land Steiermark (provincial government). On this basis, five change detection methods are applied and the results compared, which is difficult because of the large variation. Validation can only take place through field inspection. This thesis opens with an introduction, problem statement and objectives. Further, it includes a description of the methods of change detection as well as a comparison of similar applications and projects. The next part provides a description of the study area, the database and the selected biotope types. The chapter called methodology includes the selection of the satellite data used based on availability, temperature, precipitation and phenological data as well as data preprocessing and the application of methods. The next part shows the results of the analyses, which are described, illustrated and compared. It concludes with a discussion and an outlook into the future.