Santa Rita Experimental Range
Repeat Photography

Photo Station #071

Photo Archive No. 71.1.1936.07

Permanent No. 344248. Temporary No. 2430. Photo Station 71. West side of bald knoll in pasture 8, just northeast of Florida Station. Showing good grass on a steep hillside, little erosion evident at the present time. Photo by Cribbs, S.R.E.R. 7/23/36. 104-C.

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Photo Archive No. 71.1.1985.09

PS 71. Azimuth 28. 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. 71.1.2000.12

PS 71. December 14, 2000, 2:30 p.m. Facing northeast. Azimuth 28. Pasture 8. ASA 100 TMAX film. 35mm lens focal length. Almost match of 1936 photo; better than 1985 attempt. No fence post. Large tree is mesquite; tree on right is Mexican blue oak. Huerfano Butte is too far left to be visible. M. McClaran.

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Photo Archive No. 71.1.2007.04

PS. 071. 16 April 2007. Facing northeast, Azimuth 28. Pasture 8. Elevation 1429 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. No witness, rebar placed, tagged and painted white; camera above. Rebar immediately downslope from prickly pear patch. Photo location slightly forward from 2000 photo to better match 1936 photo. Mexican blue oak in right upper corner in 1936 is present, as is mesquite in center midground. Velvet pod mimosa in midground center is sprouting back from top-kill in July 2005 fire, but left mimosa plant is dead. Prickly pear and barrel cacti present; Calliandra, ocotillo, Palmer agave, shrubby buckwheat also present. Sideoats grama, sprangletop, Lehmann lovegrass common; also one squirreltail in prickly pear patch in foreground. Goldeneye (Viguiera sp.) dominates herbaceous layer. Compared to 2000, more grass, more Goldeneye (Viguiera sp.), less velvet pod mimosa. M. McClaran photographer, M. McMurtry assistant.

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Photo Archive No. 71.1.2012.03

PS. 071. 13 March 2012, 3:26 PM. Facing northeast, Azimuth 28. Pasture 8. Elevation 1423 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness is rebar, tagged and painted white; camera above. Rebar immediately downslope from prickly pear patch. Photo location slightly forward from 2000 photo to better match 1936 photo. Mexican blue oak in right upper corner in 1936 is dead. Mesquite present and some 2011 leaves are green. Velvet pod mimosa in midground center is sprouting back from top-kill in July 2005 fire, but left mimosa plant is dead. Prickly pear and barrel cacti present; Calliandra, ocotillo, Palmer agave, shrubby buckwheat also present. Sideoats grama, sprangletop, Lehmann lovegrass common; also one squirreltail in prickly pear patch in forgroundground.. Compared to 2007, lost goldeneye (Viguiera sp.), lost barrel cactus, lost oak, lost agave; less prickly pear especially foreground; and more velvet pod mimosa. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 71.1.2018.03

PS. 071. 06 March 2018, 3:15 PM. Facing northeast, Azimuth 28. Pasture 8. Elevation 1423 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness is rebar, tagged and painted white; camera above. Rebar immediately downslope from prickly pear patch. Photo location slightly forward from 2000 photo to better match 1936 photo. Mexican blue oak in right upper corner in 1936 is dead. Mesquite present and some 2017 leaves are green. Velvet pod mimosa in midground center is sprouting back from top-kill in July 2005 fire, but left mimosa plant is dead. Prickly pear and barrel cacti present; Calliandra, ocotillo, Palmer agave, shrubby buckwheat, Mexican oregano also present. Sideoats grama, sprangletop, Lehmann lovegrass common; also threeawn cane beardgrass present; and one squirreltail in prickly pear patch in foreground. Compared to 2012, lost sprangletop; prickly pear growth in left foreground but death in middle foreground; and bare patch now vegetated under mesquite in left midground. M. McClaran photographer, K. Landreville assistant.

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Photo Archive No. 71.2.2007.04

PS. 071. 16 April 2007. Facing west, Azimuth unknown. Pasture 8. Elevation 1429 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. No witness, rebar placed, tagged and painted white; camera above. Rebar immediately downslope from prickly pear patch. New photo location, added because view of Santa Rita is excellent. Kidneywood in prickly pear patch survived July 2005 fire. Also present are ocotillo, desert spoon, Mexican blue oak downslope. Prickly pear and barrel cacti present; Calliandra, ocotillo, Palmer agave, shrubby buckwheat also present. Sideoats grama, sprangletop, Lehmann lovegrass common. Unknown Goldeneye (Viguiera sp.) dominates herbaceous layer. M. McClaran photographer, M. McMurtry assistant.

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Photo Archive No. 71.2.2012.03

PS. 071. 13 March 2012, 3:32 PM. Facing west, Azimuth unknown. Pasture 8. Elevation 1429 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness is rebar, tagged and painted white; camera above. Rebar immediately downslope from prickly pear patch. Kidneywood in prickly pear patch survived July 2005 fire, and is sprouting at the base beneath the prickly pear. Also present are ocotillo, desert spoon, Mexican blue oak downslope. Prickly pear and barrel cacti present; Calliandra, ocotillo, shrubby buckwheat also present. Sideoats grama, sprangletop, Lehmann lovegrass common. Compared to 2007, less goldeneye (Viguiera sp.),; ocotillo in left foreground has some flowers; mesquites on midground bluff are still present but they are difficult to see in shadows; and less prickly pear to right of midground ocotillo. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 71.2.2018.03

PS. 071. 06 March 2018, 3:20 PM. Facing west, Azimuth unknown. Pasture 8. Elevation 1429 m. ISO 160, 35mm focal length, Canon 5D Mark II Digital Camera. Witness is rebar, tagged and painted white; camera above. Rebar immediately downslope from prickly pear patch. Kidneywood in prickly pear patch survived July 2005 fire, and is sprouting at the base beneath the prickly pear. Also present are ocotillo, desert spoon, Mexican blue oak downslope. Prickly pear and barrel cacti present; Calliandra, ocotillo, shrubby buckwheat also present. Sideoats grama and Lehmann lovegrass common, and other grasses are Boer’s lovegrass and threeawn. Evidence of two recent fires in distance vegetation: middle 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, more dead grass but also more live grass cover; some prickly pear death and some growth for different plants. M. McClaran photographer, K. Landreville assistant.

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