Descriptive characteristics of the underground sites we sampled.

Abbreviations: latitude and longitude in decimal degrees (Coordinates); altitude at the site entrance in meters (Alt); the number of entrances (N); the total entrance size (Size); the orientation of the entrance (Orientation); degree of shelter around the entrance (Shelter); the surface area of the mine in ha (Area); degree of chamber development (Chamber); hydrological activity in the mine (Hydr.); and the number of species observed during swarming (Swarm), and hibernation surveys (Hiber). All subjective mine characteristics (Orientation, Shelter, Chamber development, Hydrology) were characterized as described in Glover and Altringham [13]. Remaining measurements were obtained from the Studiegroep Onderaardse Kalksteengroeven [36], and updated based on the dataset of AJH.
Descriptive characteristics of the underground sites we sampled.