Santa Rita Experimental Range
Repeat Photography

Photo Station #018

Photo Archive No. 018.1.1936.06.1

Perm. No. 329028. Temp. No. 2294. Photo Station #18, at Plot #1. Study Area 106, located on the south side of the road leading to Box Station. Photo shows 50x50 burroweed plot just before burning. This is part of the burroweed study project to determine the effect of burning on burroweeds and other vegetation at different seasons of the year. 1/10-168"-K2-CP. Photo by Cribbs, S.R.E.R. 6/11/36. Compare 2295. 400-D.

Download Photo (3,569,104 bytes)

Photo Archive No. 018.1.1936.06.2

Perm. No. 329029. Temp. No. 2295. Photo Station #18. Showing 50x50 ft. burroweed plot #1, at Study Area #106, immediately after burning. 1/10-16-8"-K2-CP. Photo by Cribbs, S.R.E.R. 6/11/36. Compare 2294. 400-D.

Download Photo (3,686,642 bytes)

Photo Archive No. 018.1.1952.09

P.S. 18. B-52-12. Study Area 106 looking NE - burroweed burning plot. 35-45-13 3/4". Repeat of 329029. Bohning, SRER. 4 Sept. 1952.

Download Photo (3,648,492 bytes)

Photo Archive No. 018.1.1960.03

T-185. P.S. #18. 25 Mar 1960. 10H3b.

Download Photo (3,643,454 bytes)

Photo Archive No. 018.1.1985.06

PS-18. Azimuth 264. June 26, 1985. RFB. Canon AE-1 camera (35mm). 35mm WA lens. Robert F. Buttery.

Download Photo (1,607,922 bytes)

Photo Archive No. 018.1.2000.04

PS 18. April 21, 2000, 12:30 p.m. Facing west. Azimuth 264. Pasture 2S. Plus X, ASA 125 film. 35mm lens focal length. Witness present; no tag; marked with pencil. Burned in 1994, killing most trees and all Haplopappus tenuisectus. Replaced by Eragrostis lehmanniana and a couple of Heteropogon contortus. Remaining trees are sprouting. Fence on left is ARS watershed study. M. McClaran.

Download Photo (2,090,320 bytes)

Photo Archive No. 018.1.2007.04

PS. 018. 09 April 2007. Facing northeast, Azimuth 45. Pasture UA Cell. Elevation 1164 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive. Cholla and prickly pear cacti. Lehmann lovegrass dominant with many small plants recently recruited, also find threeawns, tanglehead and Boers lovegrass. Pipes in view were part of burroweed burning treatment in 1936 scattered cottontop. All mesquite burned in 1994, and regrowth is greater now than 2000. My truck in background. Compared to 2000, less grass. M. McClaran photographer, C. McMurtry assistant.

Download JPEG Photo (5,591 KB)

Download RAW Photo (15,964 KB)

Photo Archive No. 018.1.2009.03

PS. 018. 18 March 2009. Facing northeast, Azimuth 45. Pasture UA Cell. Elevation 1167 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive. Cholla and prickly pear cacti. Lehmann lovegrass dominant also find threeawns, cottontop and tanglehead. Pipes in view were part of burroweed burning treatment in 1936 scattered cottontop. All mesquite burned in 1994. The large mesquite that was present in the center of the photos from 1936, 1952, and 1960; but dead in 1985, may be present as skeleton behind the mesquite plant that is in the center of the photo now. Compared to 2007, more grass, no Boer’s lovegrass remaining, increase in Bouteloua aristidoides; and note that cottontop are the large grass plants in the exclosure on the left. M. McClaran photographer, A. Peterson assistant.

Download JPEG Photo (4,957 KB)

Download RAW Photo (12,221 KB)

Photo Archive No. 018.1.2015.03

PS. 018. 17 March 2015. 2:31 pm. Facing northeast, Azimuth 45. Pasture UA Cell. Elevation 1167 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, and leaves emerging. Cholla and prickly pear cacti. Snakeweed and burrowed present but not abundant. Lehmann lovegrass not common; annual threeawn very common, scattered perennial threeawn, also find threeawns, cottontop (under mesquite distant right) and tanglehead. Pipes in view were part of burroweed burning treatment in 1936 scattered cottontop. All mesquite burned in 1994. The large mesquite that was present in the center of the photos from 1936, 1952, and 1960; but dead in 1985, may be present as skeleton behind the mesquite plant that is in the center of the photo now. Compared to 2009, decrease in tanglehead in center, but increase to left of center. M. McClaran photographer, K. Hawkes assistant.

Download JPEG Photo (11,228 KB)

Download RAW Photo (25,017 KB)

Photo Archive No. 018.1.2021.03

PS. 018. 26 March 2021. 4:14 pm. Facing northeast, Azimuth 45. Pasture UA Cell. Elevation 1167 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive. Cholla and prickly pear cacti. Snakeweed and burrowed present but not abundant. Lehmann lovegrass is common; also find Porophyllum, threeawns, cottontop (under mesquite distant right) and tanglehead. Pipes in view were part of burroweed burning treatment in 1936 scattered cottontop. All mesquite burned in 1994. The large mesquite that was present in the center of the photos from 1936, 1952, and 1960; but dead in 1985, may be present as skeleton behind the mesquite plant that is in the center of the photo now. Compared to 2015 and following very dry and hot conditions between July 2020 and March 2021, decrease in perennial grass cover and density including decreases in tanglehead, Lehmann lovegrass and Aristida spp.; very little grass production in summer 2020 and very little green grass present now; increase in cholla and prickly pear, increase in size of small mesquite, new appearance of Porophyllum. M. McClaran photographer, A. Gorlier assistant.

Download JPEG Photo (13,990 KB)

Download RAW Photo (25,857 KB)