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.