Table S1. A census of imagery available at alien tree invasion sites from supplementary files 1 and 3. Also provided are the date an image was taken, the name of the company that provided the image (Image provider) and of the satellite or aerial photography programme that took the image (Image source), and the spatial resolution of the image (Resolution), when available.

Site name / Country / Date / Image provider / Image source / Resolution (m)
Lodgepolepine in Chile / Chile / 25/12/2004 / DigitalGlobe / IKONOS-2 / 4
28/02/2010 / DigitalGlobe / IKONOS-2 / 4
31/10/2011 / DigitalGlobe / WorldView-2 / 1.84
Wild olive in Australia / Australia / 21/07/2002 / DigitalGlobe / Quickbird / 2.4
17/04/2006 / DigitalGlobe / Quickbird / 2.4
20/01/2007 / Sinclair Knight Merz / Quickbird / 2.4
01/01/2009 / Sinclair Knight Merz / ? / ?
30/06/2009 / Sinclair Knight Merz / ? / ?
22/04/2010 / DigitalGlobe / ? / ?
16/10/2011 / DigitalGlobe / GeoEye-1 / 1.65
24/11/2012 / DigitalGlobe / GeoEye-1 / 1.65
Wild tamarind in Taiwan / Taiwan / 23/04/2007 / DigitalGlobe / Quickbird / 2.4
02/02/2010 / DigitalGlobe / GeoEye-1 / 1.65
17/01/2013 / DigitalGlobe / IKONOS-2 / 4
Australian broad-leaved paperbark in Florida / USA / 15/01/1994 / U.S. Geological Survey / National Aerial Photography Program / 1
21/02/1999 / U.S. Geological Survey / National Aerial Photography Program / 1
01/01/2002 / U.S. Geological Survey / ? / ?
01/01/2004 / The Florida Department of Environmental Protection / ? / ?
01/01/2005 / U.S. Geological Survey / USGS High Resolution Orthoimagery / 1
13/02/2005 / DigitalGlobe / Quickbird / 2.4
28/05/2005 / USDA Farm Service Agency / Aerial photograph / 1
01/01/2006 / U.S. Geological Survey / ? / ?
01/03/2006 / U.S. Geological Survey / USGS High Resolution Orthoimagery / 1
06/04/2006 / USDA Farm Service Agency / Aerial photograph / 1
08/05/2007 / USDA Farm Service Agency / Aerial photograph / 1
01/01/2009 / ? / ? / ?
Site name / Country / Date / Image provider / Image source / Resolution (m)
Australian broad-leaved paperbark in Florida (cont.) / USA / 01/04/2010 / ? / ? / ?
01/01/2010 / USDA Farm Service Agency / Aerial photograph / 1
27/03/2011 / ? / ? / ?
Mesquite invasion in the Northern Cape of South Africa / South Africa / 09/08/2005 / DigitalGlobe / Quickbird / 2.4
22/11/2006 / Cnes/Spot / SPOT / 20
05/12/2009 / DigitalGlobe / GeoEye-1 / 1.65
02/04/2011 / DigitalGlobe / GeoEye-1 / 1.65
Tamarisk along the Colorado River, Utah / USA / 19/06/1993 / U.S. Geological Survey / Digital Orthophoto Quadrangles / 1
20/03/2003 / DigitalGlobe / Quickbird / 2.4
21/06/2003 / DigitalGlobe / Quickbird / 2.4
25/09/2006 / USDA Farm Service Agency / Aerial photograph / 1
22/08/2007 / DigitalGlobe / Quickbird / 2.4
23/06/2009 / USDA Farm Service Agency / Aerial photograph / 1
02/04/2010 / DigitalGlobe / GeoEye-1 / 1.65
10/06/2011 / DigitalGlobe / ? / ?
15/09/2011 / USDA Farm Service Agency / Aerial photograph / 1
10/06/2012 / ? / ? / ?
12/06/2012 / ? / ? / ?
Silky oak invasion in Hawaii / USA / 20/06/2001 / U.S. Geological Survey / ? / ?
24/10/2003 / DigitalGlobe / Quickbird / 2.4
08/03/2006 / DigitalGlobe / Quickbird / 2.4
05/10/2006 / DigitalGlobe / Quickbird / 2.4
10/01/2013 / ? / ? / ?
Shoebutton invasion in the Everglades, Florida / USA / 27/12/1994 / U.S. Geological Survey / Digital Orthophoto Quadrangles / 1
20/02/1999 / U.S. Geological Survey / Digital Orthophoto Quadrangles / 1
21/02/1999 / U.S. Geological Survey / Digital Orthophoto Quadrangles / 1
Site name / Country / Date / Image provider / Image source / Resolution (m)
Shoebutton invasion in the Everglades, Florida (cont.) / USA / 25/02/1999 / U.S. Geological Survey / Digital Orthophoto Quadrangles / 1
20/11/2004 / DigitalGlobe / Quickbird / 2.4
01/01/2004 / The Florida Department of Environmental Protection / ? / ?
01/03/2006 / U.S. Geological Survey / USGS High Resolution Orthoimagery / 1
13/11/2007 / USDA Farm Service Agency / Aerial photograph / 1
01/01/2009 / USDA Farm Service Agency / Aerial photograph / 1
01/01/2010 / USDA Farm Service Agency / Aerial photograph / 1
27/03/2011 / USDA Farm Service Agency / Aerial photograph / 1
Pine trees invading fynbosshrublands in South Africa / South Africa / 27/05/2005 / DigitalGlobe / Quickbird / 2.4
22/11/2006 / Cnes/Spot / SPOT / 10
17/08/2011 / DigitalGlobe / GeoEye-1 / 1.65
Black wattle invasion in South Africa / South Africa / 18/10/2003 / DigitalGlobe / Quickbird / 2.4
07/08/2005 / Cnes/Spot / SPOT / 20
01/01/2010 / CDNGI / ? / ?
Supplementary file 3 / Chile / 03/04/2003 / NASA / Landsat / 15
10/09/2003 / DigitalGlobe / IKONOS-2 / 4
29/04/2007 / Cnes/Spot / SPOT / 10
09/03/2010 / DigitalGlobe / IKONOS-2 / 4
09/10/2010 / DigitalGlobe / IKONOS-2 / 4
25/11/2010 / DigitalGlobe / ? / ?
14/08/2011 / DigitalGlobe / GeoEye-1 / 1.65