Sampling locations across the study area in the Czech Republic. Sample site numbers indicate the name of locations and coordinates are in brackets: (1) Březnice (49.556628, 13.954390), (2) Chyšná (50.545694, 13.437376), (3) Cizkrajov (49.0303555, 15.390124), (4) České Budějovice (48.974749, 14.453704), (5) Český Krumlov (48.813194, 14.321542), 6) Hodětín (49.251090, 14.547873), (7) Kardašova Řečice (49.18.2636, 14.848994), (8) Lidéřovice (49.064462, 15.373599), (9) Praha (50.074130, 14.522609), (10) Protivín (49.196654, 14.216850), (11) Přibyslav (49.580047, 15.739454), (12) Pyšely (49.875659, 14.680111), (13) Řevnov (49.475599, 14.632047), (14) Telč (49.184339, 15.472545), (15) Věžovatá Pláně (48.776780, 14.408550) and (16) Zmišovice (49.496220, 15.188810).