S1 File -

Table A presents the number of presence records, target group, beta-multiplier, and feature types used for the top MaxEnt models developed for each species. Table B describes the number of suitable patches and mean patch size for boreal forest species under current and future climate projections (2050, 2080), within the current distribution of the boreal forest. Table C includes the number of suitable patches and mean patch size for boreal forest species under current and future climate projections (2050, 2080), within the Ontario-Québec bottleneck region. Table D provides contributions of environmental variables to climate niche suitability of boreal forest species. Note that the listed variables represent those contributing most to MAXENT models but they may not drive actual niche suitability and therefore caution is warranted in interpretation. Figure A provides distribution of presence records for 12 boreal-obligate trees, birds and mammals. Figure B describes change in environmental suitability for 12 boreal-obligate species within the boreal biome from current to 2080. Red represents lost suitability, blue represents suitability gain, and green indicates currently suitable cells that remain suitable. Solid line represents the Ontario-Québec bottleneck region. Figure C includes change in climate between current and 2080 for environmental variables used to generate climate suitability models. Future climate data used in the calculation for these figures were created by averaging values between the two projection sources (CGCM3, CSIRO mk3.5). Figure D describes replicates of the Ontario-Québec bottleneck region. The solid line represents the actual bottleneck and the extent of the boreal forest, and dotted lines represent randomly-selected replicates.

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