Region: study area in which the grassland is located [lrv, Lech River Valley; mgp, Munich Gravel Plain] DIST.POOL.CONT: spatial distance to the nearest historically old grassland in contemporary landscape [m] Area: size of grassland [m^2] Perim.area.ratio: ratio of the patch perimeter to area [m/(m^2)] Habitat100: Amount of calcareous grassland habitat in in a radius of 100 m around the grassland [m^2] Habitat300: Amount of calcareous grassland habitat in in a radius of 300 m around the grassland [m^2] Habitat500: Amount of calcareous grassland habitat in in a radius of 500 m around the grassland [m^2] Age: Age of the grassland measured as years since secondary succession and semi-natural grassland management started after intensive agricultural use or disturbance (as per 2014) [yrs] DIST.POOL.HIST: spatial distance to the nearest historically old grassland at the time of origin of the recovering grassland (i.e. when succession and semi-natural grassland management started) [m]