Overview of the study region and example site for illustration of the used landscape metrics.

<p>(A) Study region with all sampled sites (red dots). (B) Example site where the black patch in the middle is the sampled calcareous grassland, red patches are calcareous grasslands in the surrounding landscape, green patches are other semi-natural habitats and blue lines are borders between different land-use patches. The Connectivity Index takes area and distance of red patches to the black patch (sampled site) into account. Landscape composition is the percentage of semi-natural habitats (all green and red patches). Landscape configuration is the number of patches (blue lines) in the landscape (patch density).