Top 20 Generalist Tree Species
Ordered by Overall Niche Breadth

SpeciesOverall Niche Breadth
(# Ecoregions
Occupied)		Common Name
Acer_rubrum noelev635red maple
Acer_rubrum elev622red maple
Ulmus_americana noelev522American elm
Fraxinus_pennsylvanica noelev518green ash
Ulmus_americana elev508American elm
Prunus_serotina noelev502black cherry
Prunus_serotina elev493black cherry
Fraxinus_pennsylvanica elev492green ash
Populus_tremuloides noelev483trembling aspen
Acer_saccharum noelev473sugar maple
Populus_tremuloides elev459trembling aspen
Quercus_rubra noelev456northern red oak
Quercus_rubra elev446northern red oak
Acer_saccharum elev445sugar maple
Fraxinus_americana noelev438white ash
Pinus_ponderosa noelev435ponderosa pine
Quercus_alba noelev434white oak
Pseudotsuga_menziesii noelev429Douglas-fir
Fraxinus_americana elev427white ash
Pseudotsuga_menziesii elev426Douglas-fir

Bottom 20 Specialist Tree Species
Ordered by Overall Niche Breadth

SpeciesOverall Niche Breadth
(# Ecoregions
Occupied)		Common Name
Betula_occidentalis elev1water birch
Carya_myristiciformis elev1nutmeg hickory
Cupressus_abramsiana elev1Santa Cruz cypress
Pinus_longaeva noelev1bristlecone pine (Great Basin)
Quercus_boyntonii elev1Boynton oak
Quercus_boyntonii noelev1Boynton oak
Quercus_similis elev1Delta post oak
Sequoiadendron_gigan elev1giant redwood
Abies_bracteata elev2bristlecone fir
Castanea_ozarkensis elev2Ozark chinkapin
Castanea_ozarkensis noelev2Ozark chinkapin
Cupressus_abramsiana noelev2Santa Cruz cypress
Larix_lyallii elev2subalpine larix
Quercus_similis noelev2Delta post oak
Ulmus_serotina elev2September elm
Ulmus_serotina noelev2September elm
Cotinus_obovatus elev3smoketree
Cotinus_obovatus noelev3smoketree
Larix_lyallii noelev3subalpine larix
Pinus_balfouriana elev3foxtail pine