Appendix S2 – Maps of change in plot-level relative basal area, and the composition of the Acer spp. group during the Great Lakes Inventory and Monitoring Surveys Post-settlement ecological changes in the forests of the Great Lakes National Parks Alison K. Paulson, Suzanne Sanders, Jessica Kirschbaum, and Donald M. Waller Apostle Islands NL PLS GLKN Abies balsamea Betula alleghaniensis Pinus resinosa Populus spp. Thuja occidentalis Acer spp. Betula papyrifera Pinus strobus Red Oak Group Tsuga canadensis Grand Portage NM PLS GLKN Abies balsamea Betula papyrifera Picea spp. Pinus strobus Populus spp. Indiana Dunes NL PLS GLKN Acer spp. Nyssa sylvatica Pinus strobus Robinia pseudoacacia Ulmus spp. Fagus grandifolia Pinus spp. Red Oak Group Salix spp. White Oak Group Liriodendron tulipifera Fig. S1. Plot-level relative basal area at both the PLS (left) and GLKN (right) time points; the color and shape of each plot indicates the species with the highest relative basal area at that plot. Isle Royale NP PLS GLKN Abies balsamea Betula alleghaniensis Fraxinus spp. Picea spp. Populus spp. Acer spp. Betula papyrifera Larix laricina Pinus strobus Thuja occidentalis PLS GLKN Mississippi NRRA Acer negundo Celtis occidentalis Populus deltoides Quercus macrocarpa Ulmus spp. Acer spp. Fraxinus spp. Prunus spp. Red Oak Group White Oak Group Carya spp. Pictured Rocks NL PLS GLKN Acer spp. Fagus grandifolia Pinus resinosa Populus spp. Thuja occidentalis Betula alleghaniensis Pinus banksiana Pinus strobus Prunus spp. Tsuga canadensis Betula papyrifera Fig. S2. Plot-level relative basal area at both the PLS (left) and GLKN (right) time points; the color and shape of each plot indicates the species with the highest relative basal area at that plot. Saint Croix NSR PLS GLKN Abies balsamea Acer spp. Picea spp. Pinus spp. Quercus macrocarpa Tsuga canadensis Fraxinus spp. Pinus banksiana Pinus strobus Red Oak Group Ulmus spp. Larix laricina Pinus resinosa Populus spp. Tilia americana White Oak Group Sleeping Bear Dunes NL PLS GLKN Acer spp. Larix laricina Pinus resinosa Pinus strobus Thuja occidentalis Betula papyrifera Pinus banksiana Pinus spp. Red Oak Group Tsuga canadensis Fagus grandifolia PLS GLKN Voyageurs NP Abies balsamea Larix laricina Pinus resinosa Populus sp. Thuja occidentalis Betula papyrifera Picea sp. Pinus strobus Red Oak Group Tilia americana Fraxinus spp. Pinus banksiana Fig. S3. Plot-level relative basal area at both the PLS (left) and GLKN (right) time points; the color and shape of each plot indicates the species with the highest relative basal area at that plot. Acer negundo 40 Acer pensylvanicum Acer rubrum Acer saccharinum e Basal Area (%) v 20 Acer saccharum Acer spicatum Relati 0 APIS INDU ISRO MISS PIRO SACN SLBE VOYA Fig. S4. Relative basal area of the six Acer species surveyed by the Great Lakes Inventory and Monitoring Network at Apostle Islands NL (APIS), Indiana Dunes NL (INDU), Isle Royale NP (ISRO), Mississippi NRRA (MISS), Pictured Rocks NL (PIRO), Saint Croix NSR (SACN), Sleeping Bear Dunes NL (SLBE), and Voyageurs NP (VOYA). .