© since 1995, Sigrid Hehl, IRL-Institut, ETHZürich


Functions and Effects of Biotopes: GIS-based Analysis andVisualization

In planning in general and also in landscape planning typically acertain land use or even more than one land use are allocated to aspecific area. The functions of a landscape or of its elements andthe effects of a specific land use of an area on its surroundings aremore or less ignored.

Using the example of the Greater Mouse-eared Bat (Myotismyotis) the functions of certain biotopes are identified.

Instead of the time-consuming telemetric approach the currentresearch project tries to design a GIS-model for the calculation andmapping of potential foraging habitats, based on a known site - thenursery colony. Essential data sources which are to be integrated isinformation about the specific radius of activity of the bat speciesand certain structural elements of the landscape which the bat needsfor orientation in order to reach the foraging habitats.

Through GIS-based visualization techniques the GIS-data can beutilized in a 3D-visualization environment. The GIS-model is aflexible instrument for incorporating the effects of possible futureland-use changes. It allows the modeling of the effects of biotopefragmentation as well as modeling the positive influence of astructural habitat network.

Possible flight path connecting the nursery colony with the foraging area (2D)

Possible flight path connecting the nursery colony with the foraging area (3D)

Short MPEG-movie (2.5 MB, low res.) showing the flight of the Greater Mouse-Eared Bat

German summary of the study aspublished in the Neue Zürcher Zeitung of Sept. 2, 1998.


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