Rasterbasierte Modelle für die Verbreitung und Ausbreitung von Indikatorarten in einem Landschaftsmuster : 11. [Elfte] Tagung und Internationale Biometrische Gesellschaft Deutsche Region Arbeitsgruppe Ökologie

Grid based models for spread and dispersal of keyspecies in a landscape pattern

1999

14 Lit. Ang.

Unselbständiges Werk

14170

200082991

The influence of increasing changes in land-use systems on landscape functions is being investigated as part of the Collaborative Research Centre SFB 299 "Land-use options for peripheral regions". Models are being developed in order to predict the influence of different land-use systems, landscape patterns and changing socio-economic structures on the natural biodiversity of a landscape. The first model presented focuses on the spatial distribution of the Skylark's (Alauda arvensis) breeding habitats based on a cellular automaton consisting of a lattice of 25 x 25 m¬ cells. These are defined by the potential existence or non-existence of the species. Together with land coverage data the model uses readily available information from ornithological literature discribing the habital preferences of the bird. Simulation results for the dispersal of breeding habitats under different land-use scenarios are shown. Further studies will combine this model with a geographic information system to enable spatial predictions for nature conservation management. The second model simulates the spread of the European Treefrog (Hyla arborea) in a heterogenous landscape pattern along linear structures. This model is also based on a cellular automaton but different from the Skylark model it uses variable probabilities dependent on the seasons.