Santa Rita Experimental Range
Repeat Photography



site map

Photo Station #175



FEB19380 FEB 1938 1

Photo Archive No. 175.1.1938.02

C-214. SA 104C. P.S. 175, Mesquite Area, N W Corner. Moderate stand of mesquite and fairly heavy understory of burroweed. Grass cover very light and confined to protection of shrubs. Ad, Ac, Rg, Cg, and G are present in small amounts. No gullies but active sheet erosion. Burroweed all forming hummocks. Photo just prior to grubbing of mesquite. See C-251. 2/14/38. 400-D.

Download Photo (2,634,352 bytes)



MAR19380 MAR 1938 1

Photo Archive No. 175.1.1938.03

C-251. SA 104C. P S 175, Mesquite Area, N W corner of area cut and grubbed. See C-214. 3/25/38. 400-D.

Download Photo (2,516,190 bytes)



JUN19480 JUN 1948 1

Photo Archive No. 175.1.1948.06

6-48. A48-89. P.S. 175 repeat photo area 104C. Afr shows a slight decrease, cholla has come in, grass density much increased over 1938. Agl, Bro, Adi and others such as Tca, Hco, etc. The area gets more grazing use than the surrounding areas. w/k2 filter 1/50:22. SRER. Culley. 10H(3)b. Not exact field of view as in earlier photos. NOTE: Photos A48-90 and A48-91 also archived under this number but not included on the web page are the same view taken w/o filter 1/50:29 and w/a filter 1/25:14, respectively.

Download Photo (2,932,535 bytes)



MAR19600 MAR 1960 1

Photo Archive No. 175.1.1960.03

T-193. 30 Mar 60. SRER, P.S. #175. 10H3b.

Download Photo (1,170,605 bytes)



JUL19870 JUL 1987 1

Photo Archive No. 175.1.1987.07

PS 175. Azimuth 170. July 15, 1987. RFB. Canon AE-1 35mm camera. 35mm WA lens. Robert F. Buttery.

Download Photo (1,202,419 bytes)



APR20001 APR 2000 1

Photo Archive No. 175.1.2000.04

PS 175. April 10, 2000, 4:00 p.m. Facing south. Azimuth 170. Pasture 12B. Plus X, ASA 125 film. 35mm lens focal length. Witness next to 10' Prosopis velutina; in northwest corner of cleared area, about 1/4 mile south of main road. Use 1979 aerial photos to find cleared area. PS 277 is northeast of this PS. Prosopis velutina alive; Eragrostis lehmanniana, Haplopappus tenuisectus; Muhlenbergia porteri under Prosopis velutina. M. McClaran.

Download Photo (2,409,714 bytes)



175_1_2007_03 MAR 2007 1

Photo Archive No. 175.1.2007.03

PS. 175. 15 March 2007. Facing southwest, Azimuth 204. Pasture 12B. Elevation 1029 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above witness. Mesquite alive. Many dead burroweed, about half are alive. Cholla, prickly pear, Pima pineapple cactus (1), and hedgehog cacti. Lehmann lovegrass dominant grass, also Bouteloua aristidoides common. Cottontop and bush muhly under center mesquite. Compared to 2000, less grass and burroweed now. M. McClaran photographer, M. McGregor assistant.

Download JPEG Photo (5,836 KB)

Download RAW Photo (16,317 KB)



175_1_2013_03 MAR 2013 1

Photo Archive No. 175.1.2013.03

PS. 175. 20 March 2013. 1:34 pm. Facing south, Azimuth 165. Pasture 12B. Elevation 1032 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above witness. Mesquite alive. Many small burroweed. Cholla, prickly pear, Pima pineapple cactus (1), and hedgehog cacti. Blue paloverde in distant right. Ephedra near left of dead cholla. Also, zinnia, snakeweed present. Lehmann lovegrass dominant grass, also, cottontop and bush muhly under center mesquite. Compared to 2007, skeletons of burroweed are missing, and some dead cholla and hedgehog cacti; and less annual grass. M. McClaran photographer, K. Hawkes assistant.

Download JPEG Photo (5,836 KB)

Download RAW Photo (16,317 KB)



[Return to SRER Home Page]

Last updated - June 2013
Mitchel McClaran - mcclaran@u.arizona.edu