Santa Rita Experimental Range
Repeat Photography

Photo Station #072

Photo Archive No. 72.1.1936.07

Permanent No. 344249. Temporary No. 2431. Photo Station 72. West side of bald knoll, half way down slope. Very steep hillside covered with good grass cover and little erosion in evidence. Photo by Cribbs, S.R.E.R. 7/23/36. 104-C.

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Photo Archive No. 72.1.1985.09

PS 72. Azimuth 34. Sept. 13, 1985. RFB. Canon AE-1 camera (35mm). 35mm WA lens. Robert F. Buttery. Not exact field of view as in earlier photo.

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Photo Archive No. 72.1.2000.12

PS 72. December 14, 2000, 2:45 p.m. Facing northeast. Azimuth 34. Pasture 8. ASA 100 TMAX film. 35mm lens focal length. Matches 1985 and probably 1936 photos. Ocotillo and Eysenhardtia polystachya (kidneywood) in foreground; Mexican blue oak in midground. Sprangletop and sideoats dominant grasses. Some calliandra present. M. McClaran.

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Photo Archive No. 72.1.2007.04

PS. 072. 16 April 2007. Facing northeast, Azimuth 34. Pasture 8. Elevation 1402 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite midground left, Mexican blue oak background, ocotillo foreground probably not the plant in 1936 photo. The ocotillo in 1936 photo is behind the plant in the foreground today. Kidneywood immediately downslope from center ocotillo was top-killed in July 2005, and has resproted from base; desert spoon near ocotillo and kidneywood killed by that fire and only charred bases of plants remain. Velvet pod mimosa, Calliandra, desert spoon, prickly pear and barrel cacti present. Sprangletop, Lehmann lovegrass dominant grasses; also Goldeneye (Viguiera sp.) dominates herbaceous layer. Compared to 2000, less grass, more Goldeneye (Viguiera sp.), less agave, desert spoon, and mimosa. M. McClaran photographer, M. McMurtry assistant.

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Photo Archive No. 72.1.2012.03

PS. 072. 13 March 2012, 2:51 PM. Facing northeast, Azimuth 34. Pasture 8. Elevation 1430 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite midground left, Mexican blue oak background, ocotillo foreground has died and the ocotillo behind it is now visible; it is the plant in the 1936 photo. Large oak in mid-distance center may be dead now, but was alive in 2007. Kidneywood immediately downslope from center ocotillo was top-killed in July 2005, and has resprouted from base; desert spoon near ocotillo and kidneywood killed by that fire and only charred bases of plants remain. Velvet pod mimosa, Calliandra, desert spoon, prickly pear and barrel cacti present. Sprangletop, Lehmann lovegrass dominant grasses; also sideoats grama. Compared to 2007, more grass, no goldeneye (Viguiera sp.), less ocotillo and oak. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 72.1.2018.03

PS. 072. 06 March 2018, 2:35 PM. Facing northeast, Azimuth 34. Pasture 8. Elevation 1430 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite midground left, Mexican blue oak background, all oaks look alive but not healthy with brown leaves. Large oak in mid-distance center may be dead now, but was alive in 2007. Velvet pod mimosa, Calliandra, kidneywood, desert spoon, prickly pear and barrel cacti present., Lehmann lovegrass dominant grass; also sideoats grama. Compared to 2012, more goldeneye (Viguiera sp.), more grass cover but may dead grass plants. M. McClaran photographer, K. Landreville assistant.

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Photo Archive No. 72.2.2007.04

PS. 072. 16 April 2007. Facing west, Azimuth unknown. Pasture 8. Elevation 1402 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present camera above. New photo location, added because view of Santa Rita is excellent. Juniper killed by July 2005 fire. Mesquite, Mexican blue oak, ocotillo, prickly pear present. Sideoats grama, sprangletop, Lehmann lovegrass common. Goldeneye (Viguiera sp.) dominates herbaceous layer. M. McClaran photographer, M. McMurtry assistant.

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Photo Archive No. 72.2.2012.03

PS. 072. 13 March 2012, 2:48 PM. Facing northwest, Azimuth 34. Pasture 8. Elevation 1430 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present camera above. Mesquite, Mexican blue oak, ocotillo, prickly pear, desert spoon and mimosa are present. Sideoats grama, sprangletop, Lehmann lovegrass common. Compared to 2007, lost goldeneye (Viguiera sp.), dead juniper in center foreground has fallen over, and oaks don’t look healthy. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 72.2.2018.03

PS. 072. 06 March 2018, 2:40 PM. Facing northwest, Azimuth 34. Pasture 8. Elevation 1430 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present camera above. Mesquite, Mexican blue oak, ocotillo (with flowers), Palmer agave, prickly pear, cholla, desert spoon and mimosa are present. All oaks look alive but not healthy with brown leaves Sideoats grama, Lehmann lovegrass common, and other grasses are cottontop, cane beardgrass. Evidence of two recent fires in distance vegetation: midground left dark patch burned in February 2018 from arson fire; and more open vegetation in southside of UA Cell and along Road 62 was deliberately burned in the 2017 Sawmill fire to provide to reduce fuel and spread to the west. Compared to 2012, foreground desert spoon is now dead, goldeneye (Viguiera sp.) returned, more grass cover but may dead grass plants, and increased voer of prickly pear or right slope in midground. M. McClaran photographer, K. Landreville assistant.

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