Electronic Supplementary Material 1 Bioclimatic characteristics of the studied localities (bioclimatic parameters were extracted using the
DIVA-GIS 5.2 software, Hijmans et al. 2005b). Climate types C1, C2 and C3 correspond to the groupings obtained from the cluster analysis of
bioclimatic parameters (see Fig. 4b). The bioclimatic variables that were used as predictors in regression analysis are marked with asterisk (*).
Bioclimatic parameters
Annual mean temperature (1)
Mean monthly temperature range (2) *
C1
thermo-xerophilous
climate of lowland and
hilly regions
C2
dry mountain climate
of eastern Serbia
Min
Min
7.1
Avg
8.5
Max
10.2
6.8
Avg
Max
8.3
9.9
C3
humid mountain
climate of western
Serbia
Min
4.0
Avg
7.4
Max
8.8
8.1
8.7
9.7
9.1
9.5
10.1
7.8
8.7
9.1
29.4
30.3
32.4
32.1
32.6
33.4
29.7
31.0
31.7
Temperature seasonality (STD * 100) (4) *
739.4
753.3
769.3
712.3
730.4
749.1
679.3
708.5
728.6
Max. temperature of the warmest month (5)
21.8
23.7
25.8
21.8
23.8
26.1
17.7
21.9
23.5
Isothermality (2/7) (* 100) (3) *
Min. temperature of the coldest month (6)
-5.9
-5.0
-4.2
-6.5
-5.4
-4.2
-8.4
-6.1
-5.2
Annual temperature range (5–6) (7) *
27.7
28.7
30.0
28.3
29.2
30.3
26.1
28.0
28.7
Mean temperature of the wettest quarter (8)
14.2
15.8
17.4
13.5
15.2
17.1
10.3
14.0
15.8
Mean temperature of the driest quarter (9) *
-1.0
0.4
2.2
-0.5
3.1
12.4
-3.6
-0.2
1.0
Mean temperature of the warmest quarter (10)
15.9
17.5
19.1
15.3
16.9
18.8
12.1
15.8
17.5
Mean temperature of the coldest quarter (11) *
-2.2
-1.0
0.7
-2.2
-1.0
0.4
-4.5
-1.6
-0.5
736.0
759.9
799.0
628.0
659.6
694.0
855.0
940.4
976.0
Precipitation of the wettest month (13) *
91.0
94.0
98.0
73.0
76.2
80.0
100.0
101.9
107.0
Precipitation of the driest month (14)
46.0
47.5
50.0
42.0
43.6
46.0
53.0
60.1
65.0
Precipitation seasonality (CV) (15) *
20.5
24.0
27.1
18.9
19.0
19.3
15.2
17.1
21.9
Precipitation of the wettest quarter (16)
254.0
258.1
261.0
196.0
207.0
218.0
277.0
289.1
295.0
Precipitation of the driest quarter (17)
142.0
149.1
158.0
131.0
139.6
149.0
165.0
190.7
213.0
Precipitation of the warmest quarter (18)
229.0
232.4
236.0
169.0
179.6
190.0
247.0
262.3
269.0
Precipitation of the coldest quarter (19)
152.0
160.3
171.0
142.0
150.0
160.0
181.0
206.0
225.0
Annual precipitation (12) *