Potential tree species distributions from the Last Glacial Maximum in North America

Modern tree distributions modeled under current climate and predicted to past climate. Values of '2' represent presence. The column mark is current presence, while _20000 is 20 ka, _14000 is 14 ka, _13000 is 13 ka, etc. For quick download, the .dbf for each species can be joined to the shapefile (us_can_ecosub). Alternatively, download and use the zipped folder of shapefiles (glac_shapes)..