Supporting Information
Native versus nonnative invasions: Similarities and differences in the biodiversity impacts
of Pinus contorta in introduced and native ranges
Kimberley Taylor, Bruce Maxwell, Aníbal Pauchard, Martín Nuñez and Lisa Rew
Figure S1. Photos of all sites with examples of increasingly dense P. contorta invasion at each
site moving from left to right. Top row is site AR, second row from top is site CL1, third row
from top is site CL2, and bottom row is site USA. The decrease in understory plant cover is
clear in the photos farthest to the right.
Table S1. Description of study sites (AR, CL1, CL2, USA). Climate data obtained from the
WorldClim database (Hijmans et al., 2005). Abbreviations include temperature (temp.),
precipitation (precip.), minimum (min.), maximum (max.), and coefficient of variation (CV).
Site
Longitude
Latitude
Plots
AR
CL1
CL2
USA
-71.229
-41.148
13
-71.702
-45.501
20
-71.542
-38.424
19
-111.14
45.064
21
Patagonian
shrub steppe
Patagonian
grass steppe
Araucaria
araucana
forest
Artemisia
tridentata
shrub steppe
Plantation
Plantation
Forestry trial
plots
Native Forest
Source Age (years)
34
23
43
>100
Elevation (M.S.L)
835
745
1435
2060
Annual mean temp. (°C)
8.2
5.8
6.7
1.4
Mean max. temp. (°C)
21.9
16.3
22.1
23.7
Mean min. temp. (°C)
-1.6
-3
-2
-16
Annual precip. (mm)
846
715
1586
643
Precip. wettest quarter (mm)
417
290
810
192
Precip. driest quarter (mm)
81
108
123
135
Precip. warmest quarter (mm)
81
108
123
162
Precip. coldest quarter (mm)
397
262
767
164
Precip. seasonality (CV)
65
42
69
18
Mean temp. wettest quarter (°C)
3.5
1.1
2.6
5.3
Mean temp. driest quarter (°C)
13.8
10.6
11.5
8.4
Temperature annual range
23.5
19.3
24.1
40.0
Community type
Source type
Hijmans, R.J., Cameron, S.E., Parra, J.L., Jones, P.G. & Jarvis, A. (2005) Very high resolution
interpolated climate surfaces for global land areas. International Journal of Climatology,
25, 1965-1978.
Table S3. The slope and p-value for each species that had a relationship between their cover and
Pinus contorta cover at all sites. N represents the number of plots that each species was found
in. In the text significance is assumed at P<0.05 but here we display species whose relationship
with Pinus contorta cover has a significance of P<0.1 to show the species that have weaker
correlations with Pinus contorta as well.
Site
AR
AR
AR
AR
AR
AR
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL1
CL2
CL2
CL2
CL2
CL2
USA
USA
USA
USA
USA
Species
Agrostis capillaris
Koeleria sp.
Mulinum spinosum
Rumex acetosela
Senecio sericeonitens
Taraxacum officinale
Agrostis capillaris
Armeria maritima
Calceolaria biflora
Chloraea magellanica
Erigeron imbricatus
Festuca pallescens
Festuca pyrogea
Loasa berghi
Luzula alopecurus
Mulinum spinosum
Nassauvia darwinii
Noccaea magellanica
Senecio kingii
Sisyrinchium arenarium
Viola reichei
Acaena pinnatifida
Eleocharis melanostachys
Festuca scabriuscula
Lathyrus sp.
Quinchamalium chilense
Agropyron smithii
Artemisia tridentata
Besseya wyomingensis
Juniperus communis
Poa palustris
Slope
-0.0026
-0.0030
-0.3715
-0.0029
-0.0007
0.0034
-0.0086
-0.0022
-0.0030
-0.0008
-0.0016
-0.1555
-0.0082
-0.0008
-0.0006
-0.0049
-0.0026
-0.0007
-0.0017
-0.0008
0.0009
-0.0053
-0.0092
-0.1790
-0.0036
-0.0034
0.0151
-0.2215
-0.0005
0.0040
0.0033
p-value
0.085
0.041
0.004
0.090
0.046
0.084
0.013
0.025
0.006
0.005
0.031
0.029
0.018
0.020
0.026
0.020
0.008
0.017
0.049
0.010
0.005
0.069
0.024
0.009
0.059
0.053
0.093
0.060
0.075
0.055
0.039
N
5
6
10
9
4
3
11
7
12
6
9
19
6
9
4
6
8
6
8
10
9
6
14
18
6
6
16
17
5
4
3
Figure S2. Festuca spp. cover against Pinus contorta cover at each site. The slope of the lines
for USA and AR are not statistically different than zero, but the lines are still shown for
comparison.