Geographic sampling effort within each grid cell quantified using a kernel density estimate around each documented bat occurrence locality (units: km2; details in Herkt et al. 2016), annual Net Primary Productivity according to Imhoff et al. 2004 representing the productivity hypothesis (Connell & Orias 1964, https://www.jstor.org/stable/2459143 and Wright 1983, https://www.jstor.org/stable/3544109); standard deviation of actual evapotranspiration according to Ahn & Tateishi 2000 (http://www.grid.unep.ch/data/data.php) representing the seasonality hypothesis (e.g. Stevens 1989, https://www.jstor.org/stable/2462300; O'Brien 1993, https://www.jstor.org/stable/2845670; Carrara & Vázquez 2010, doi:10.1111/j.1600-0587.2009.05756.x); Diversity of land cover type classes measured as GLC2000 (JRC 2003, http://forobs.jrc.ec.europa.eu/products/glc2000/glc2000.php) classes sliced into elevational bands of 300 m using GTOPO30 data (USGS ORNL DAAC 2006, http://webmap.ornl.gov/wcsdown/dataset.jsp?ds_id=10003) representing the (horizontal) heterogeneity hypothesis (reviewed in Stein et al. 2014, doi:10.1111/ele.12277). Latitude and longitude values mark the center point of each 200x200 km2 grid cell.
; Fahr, Jakob