Santa Rita Experimental Range
Repeat Photography

Photo Station #075

Photo Archive No. 75.1.1911.07

392534. July 1911. P.S. 75. Celtis pallida. Shrub, common in the Santa Rita pasture, one mile west of south gate. E.O. Wooten.

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Photo Archive No. 75.1.1941.09

A-1879. Photo Sta. No. 75. Retake of Photo No. 7305 (W.O. No. 392534) probably taken by Wooten between 1910 and 1915. A very decided increase in mesquite and other shrubs has occurred. Ground cover has decreased very markedly. (5x7). Sept. 1941. NOTE: Photo A-1880 also archived under this number but not included on the web page is the same view.

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Photo Archive No. 75.1.1984.05

PS 75. Azimuth 112. May 3, 1984. RFB. Honeywell Pentax 35mm camera. 35mm WA lens. f:11-16 1/125 15'. 9:00 A.M. Robert F. Buttery.

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Photo Archive No. 75.1.1988.02

PS 75. Az 112. Feb. 2, 1988. RFB. Canon AE-1 camera. 35mm WA lens. f:5.6 1/250 Inf. 1:20 P.M. Robert F. Buttery.

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Photo Archive No. 75.1.2000.04

PS 75. April 14, 2000, 2:45 p.m. Facing east. Azimuth 112. Pasture 2S. Plus X, ASA 125 film. 35mm lens focal length. Witness present and marked; 1/4 mile east of road 486. Not exact match of 1911 photo; appears to be west of that PS. Midground, left of center are 2 Celtis. Two small Acacia in foreground; few Haplopappus tenuisectus; only grass is Eragrostis lehmanniana. M. McClaran.

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Photo Archive No. 75.1.2007.04

PS. 75. 09 April 2007. Facing east, Azimuth 112. Pasture UA Cell. Elevation 1141 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, 50% burroweed dead, small catclaw in center midground, 2 Celtis behind, the second Celtis with graythorn in canopy; behind those find a large mesquite. No cacti. Lehmann lovegrass dominant with many small plants recently recruited, also find bush muhly under mesquite. Not confident this matches 1911 photo because Celtis in that photo are not present. Original probably upslope from here. Compared to 2000, less grass and less burroweed. M. McClaran photographer, C. McMurtry assistant.

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Photo Archive No. 75.1.2009.03

PS. 75. 18 March 2009. Facing east, Azimuth 112. Pasture 11A. Elevation 1143 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, small catclaw in center midground, two Celtis behind, the second Celtis with graythorn in canopy; behind those find a large mesquite. No cacti. Lehmann lovegrass dominant with many small plants recently recruited, also find bush muhly under mesquite. Not confident this matches 1911 photo because Celtis in that photo are not present; the original is probably to the north about 100 m. Compared to 2007, more Lehmann lovegrass and threeawns, and decrease in Bouteloua aristidoides. M. McClaran photographer, A. Peterson assistant.

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