Appendix S1
Table S1. Estimated relative abundance (i.e. average number of individuals per sampling point) of each species from the spatially replicated count data. For abundance the
four willow configuration variables were included as covariates and for detection year was included. Significant (at the 95% level) estimates are highlighted in bold. Note that
abundance is estimated as an “average” over the four years of the study.
Latin name
Common name
Fringilla montifringilla
Carduelis flammea
Turdus pilaris
Turdus iliacus
Luscinia svecica
Emberiza schoeniclus
Calidris temminckii
Lagopus lagopus
Phylloscopus trochilus
Pluvialis apricaria
Calcarius lapponicus
Stercorarius longicaudus
Anthus pratensis
Oenanthe oenanthe
Anthus cervinus
Buteo lagopus
Motacilla alba
Brambling
Common Redpoll
Fieldfare
Redwing
Bluethroat
Reed Bunting
Temminck's Stint
Willow Ptarmigan
Willow Warbler
Eurasian Golden Plover
Lapland Bunting
Long-tailed Skua
Meadow Pipit
Northern Wheatear
Red-throated Pipit
Rough-legged Buzzard
White Wagtail
Group Intercept
1
1
1
1
2
2
2
2
2
3
3
3
3
3
3
3
3
-1.5654
3.8636
1.3039
1.3907
1.5022
-3.7473
-0.8794
2.9208
0.9912
0.6544
0.7025
0.7569
2.3960
0.2047
-1.4289
-3.4073
0.9284
Area
1.4114
0.2611
0.1077
0.3173
0.1922
1.3334
-0.0742
0.4844
0.3456
-0.3298
-0.1754
-0.7123
0.0015
-0.2336
-0.5646
-2.1097
-0.1536
Abundance (log-scale)
Detection (logit-scale)
Edge density Willow density Willow Height Intercept (2005) 2006
2007
-0.3302
0.0285
0.1315
0.0059
0.0268
0.2648
0.2772
-0.9563
-0.0692
-0.1017
0.0048
0.6306
-0.0320
-0.3090
-0.6488
-0.1057
-0.0484
-0.3741
0.0307
-0.2262
0.0510
0.0447
-2.0777
-0.3251
0.1592
0.0698
0.1829
0.5347
-0.1169
0.0068
-0.1195
0.5638
0.0781
-0.1786
0.1870
0.1382
0.1778
0.1713
0.0216
1.3423
-0.1166
-0.3482
0.4287
-0.3477
-0.8540
-0.1797
0.1057
0.0809
-0.8252
0.5411
0.2145
-4.4449
-3.4327
-2.3651
-2.3455
-3.4817
-2.7555
-2.1505
-6.5974
-1.6885
-3.2631
-1.7032
-3.4996
-2.1004
-2.5274
-1.5196
-3.2429
-3.4507
0.9380
0.1300
-0.1869
0.3426
0.4301
1.1539
0.3251
-0.6110
0.1519
0.1134
-0.3734
-0.6852
0.0503
-0.8553
-0.0066
1.0809
0.5838
2.5549
0.0220
0.2745
0.1371
0.7199
0.6123
0.3268
0.9011
0.2545
0.6219
-0.0653
0.2169
0.0732
-0.8471
-8.7609
1.8995
0.7210
2008
0.2813
-0.8490
0.2816
0.6661
0.8375
0.0555
0.8413
0.3880
0.6440
0.6201
-0.4641
-2.3035
-0.2427
-0.6549
0.4664
1.5459
0.4553
Table S2. Mean and range of selected thicket configuration variables at the scale of 200x200m.
All regions
Ifjord
Komag
V. Jakobselv
Variables
Measure
Mean
Range
Mean
Range
Mean
Range
Mean
Range
Area
%
19.80
[1.37,54.34]
23.14
[7.96,47.60]
18.72
[3.65,54.34]
17.73
[1.37,37.89]
Edge density
m
440.13
[91.66,1008.93]
562.46
[270.05,1008.93]
391.28
[188.46,703.62]
372.29
[91.66,676.51]
Willow Height
cm
160.68
[77.50,270.00]
117.30
[77.50,220.00]
210.63
[145.00,270.00]
154.62
[110.00,220.00]
Willow Density
no. of hits
2.50
[0.25,5.50]
2.71
[2.00,3.25]
2.58
[0.75,5.50]
2.04
[0.25,4.25]
Figure S1. Relationships between total species richness at the sampling points and willow area and configuration variables. Upper left panel show the relationship between
total richness and willow area, upper right show edge density in relation to total richness, lower left show willow density in relation to total richness and lower right show
willow height in relation to total richness. Note that the smoothing splines are only included to ease interpretation of the direction in the relationships.
Figure S2. Relationships between yearly species richness and willow area and configuration variables for WCB. Upper left panel show the relationship between seasonal
richness and willow area, upper right show edge density in relation to seasonal richness, lower left show willow density in relation to seasonal richness and lower right show
willow height in relation to seasonal richness. Red points and lines denote 2005, blue denote 2006, grey denote 2007 and black denote 2008. Note that the solid lines
correspond to a smoothing spline with 3 df. Note that the smoothing splines are only included to ease interpretation of the direction in the relationships.
Figure S3. Relationships between yearly species richness and willow area and configuration variables for WGB. Upper left panel show the relationship between seasonal
richness and willow area, upper right show edge density in relation to seasonal richness, lower left show willow density in relation to seasonal richness and lower right show
willow height in relation to seasonal richness. Red points and lines denote 2005, blue denote 2006, grey denote 2007 and black denote 2008. Note that the solid lines
correspond to a smoothing spline with 3 df. Note that the smoothing splines are only included to ease interpretation of the direction in the relationships.
Figure S4. Relationships between yearly species richness and willow area and configuration variables for OT. Upper left panel show the relationship between seasonal
richness and willow area, upper right show edge density in relation to seasonal richness, lower left show willow density in relation to seasonal richness and lower right show
willow height in relation to seasonal richness. Red points and lines denote 2005, blue denote 2006, grey denote 2007 and black denote 2008. Note that the solid lines
correspond to a smoothing spline with 3 df. Note that the smoothing splines are only included to ease interpretation of the direction in the relationships.
Estimated Detection
1.0
0.8
0.6
0.4
0.2
cor = 0.75
0.0
0.0
0.2
0.4
0.6
0.8
1.0
Estimated Occupancy
Figure S5. Mean estimated values of occupancy and detection for the 17 species that were observed during the course of the study. The stippled line shows the one to one
relationship of equal occupancy and detection.