Table S1: List of localities sampled and their geographic coordinates (UTM). The last column shows the sampling years for each locality, old
and current respectively. 1Source: Montagud & Arrizabalaga, 1980. 2Source: Arrizabalaga et al., 1986 & review for A. flavicollis in Fernández,
2012. 3Source: Culí et al., 1989. 4Source: unpublished data from Museu de Ciències Naturals de Granollers. 5Source: Requejo, 2011.
Altitude
Locality
UTM (1×1)
Marata
31TDG4311
250
Llerona
31TDG4111
237
Arbúcies
31TDG5929
300
Centelles
31TDG3527
525
Tona
31TDG3533
600
El Brull
31TDG4229
840
La Vola
31TDG4759
800
L’Ajuda
31TDG3530
587
(m)
Place
Parish church of Santa Coloma de
Marata
Parish church of Santa Maria de
Llerona
Parish church of Sant Quirze and
Santa Julieta
Parish church of Santa Coloma de
Centelles
Town
Samples
(old-current)
Marata
19771 – 2014
Llerona
19781 – 2014
Arbúcies
19832 –
Centelles
19832 –
Church of Sant Andreu de Tona
Tona
19832 –
Church of Sant Martí del Brull
El Brull
19832 –
Clergy house of Sant Andreu de la
Vola (Cal Sastre)
Sanctuary of Mare de Déu de
l’Ajuda
Sant Pere
de Torelló
Hostalets
de Balenyà
19863–20115
19914 – 2014
Table S2: Relative frequency and differences in frequencies (%) of the small mammal species in the barn owl pellets in the old (1977–1991) and
current (2011–2014) samples. Species with significant changes were marked (+P < 0.07; *P < 0.05; ** P < 0.01; ***P < 0.001), after log-linear
model fitting to the two way contingency tables generated by the factors small mammal species x period (old/current). Data from Apodemus
spp. where analysed together since no accurate differentiation between A. sylvaticus and A. flavicollis was provided in the old sample at the
locality of La Vola.
Species
Old samples
(N and %)
Current samples
(N and %)
Frequency difference
* P < 0.05
Sorex minutus
25
0.58
4
0.22
−0.36+
Sorex araneus
12
0.28
0
0.00
−0.28**
Crocidura russula
1,247
29.16
452
25.06
−4.10**
Suncus etruscus
68
1.59
27
1.50
−0.09
Eliomys quercinus
3
0.07
0
0.00
−0.07
Myodes glareolus
4
0.09
0
0.00
−0.09
Arvicola sapidus
5
0.12
0
0.00
−0.12
Microtus agrestis
37
0.87
9
0.50
−0.37
Microtus
duodecimcostatus
555
12.98
120
6.65
−6.32***
Apodemus flavicollis
8
0.19
27
1.50
1.31
Apodemus sylvaticus
994
23.24
522
28.94
5.70
1,012
23.66
549
30.43
6.77***
1,185
27.71
469
26.00
Apodemus spp.
Mus spretus
−1.71
Mus musculus
90
2.10
96
5.32
3.22***
Rattus norvegicus
2
0.05
32
1.77
1.73***
Rattus rattus
42
0.98
46
2.55
1.57***
Total
4,277
1,804
Table S3. Absolute (number of individuals) and relative frequencies (in brackets) of small mammal species found in barn owl pellets in the four
localities with old (1977–1991) and current (2011–2014) samples available.
Species
Sorex minutus
Sorex araneus
Crocidura russula
Suncus etruscus
Eliomys quercinus
Myodes glareolus
Arvicola sapidus
Microtus agrestis
M.duodecimcostatus
Apodemus flavicollis
Apodemus sylvaticus
Mus spretus
Mus musculus
Rattus rattus
Rattus norvegicus
Total
Marata
Old
Current
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
410 (32.62) 243 (28.79)
23 (1.83)
12 (1.42)
0 (0.00)
0 (0.00)
1 (0.08)
0 (0.00)
5 (0.40)
0 (0.00)
0 (0.00)
0 (0.00)
20 (1.59)
52 (6.16)
0 (0.00)
2 (0.24)
222 (17.66) 232 (27.49)
495 (39.38) 188 (22.27)
56 (4.46)
63 (7.46)
25 (1.99)
25 (2.96)
0 (0.00)
27 (3.20)
1257
844
Llerona
Old
Current
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
323 (39.53)
84 (15.64)
15 (1.84)
14 (2.61)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
16 (1.96)
10 (1.86)
0 (0.00)
0 (0.00)
106 (12.97) 158 (29.42)
335 (41.00) 221 (41.15)
5 (0.61)
24 (4.47)
17 (2.08)
21 (3.91)
0 (0.00)
5 (0.93)
817
537
L’Ajuda
Old
Current
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
352 (24.70)
53 (22.84)
28 (1.96)
1 (0.43)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
0 (0.00)
479 (33.61)
33 (14.22)
8 (0.56)
4 (1.72)
215 (15.09)
75 (32.33)
314 (22.04)
57 (24.57)
27 (1.89)
9 (3.88)
0 (0.00)
0 (0.00)
2 (0.14)
0 (0.00)
1425
232
La Vola
Old
Current
25 (3.21)
4 (2.09)
12 (1.54)
0 (0.00)
162 (20.82)
72 (37.70)
2 (0.26)
0 (0.00)
3 (0.39)
0 (0.00)
3 (0.39)
0 (0.00)
0 (0.00)
0 (0.00)
37 (4.76)
9 (4.71)
40 (5.14)
25 (13.09)
41 (5.27)
2 (0.26)
0 (0.00)
0 (0.00)
778
3 (1.57)
0 (0.00)
0 (0.00)
0 (0.00)
191