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Table 1 Variables used in RF, CART, and Maxent models. NI-Not included. NC-Not Contributing to model. Description and statistics of variables are presented in Additional file 1

From: Predicting Ailanthus altissima presence across a managed forest landscape in southeast Ohio

Variable RF rank CART rank Maxent Rank Description
Yrs_since_last_harvest 1 1 NI years since last harvest
Near_Roads 2 NI NC distance from roads
TPI600 3 3 NC TPI with 600 m buffer
RelSun4pm 4 2 6 relative solar radiation at 4 pm
Near_Hike_Bridle 5 NI NC distance from trails
UpCanHt 6 NI 4 height of upper canopy
Harvest_Yrs_cl 7 NI NI years since harvest, class
Fire_Int_cl 8 NC NC Intensity of fire
TPI300 9 6 2 TPI with 300 m buffer
Elevation 10 NI 1 Elevation (m)
MidCanHt 11 NI NC height of mid-canopy
Asp_beer 12 NC 3 Beers aspect
Near_Ridges_vec 13 NI NC distance from ridges
Slope_deg 14 4 9 degree slope
TAU_SCA 15 7 7 specific catchment area
TPI50 16 5 NC TPI with 50 m buffer
IMI 17 NC 10 integrated moisture index
Percent_sun 18 NI NC percent sun at plot
TotalSolar 19 NI NC total solar radiation
Harvest_Int_cl 20 NI NI harvest intensity, class
Hillshade 21 NC 12 hillshade
TPI150 22 NC NC TPI with150 m buffer
Curvature 23 NC 13 curvature
LandFm50.300 m 24 NC 14 landforms derived from TPI
Area_Sol_Rad 25 NI 5 annual solar radiation