Santa Rita Experimental Range
Repeat Photography

Photo Station #029

Photo Archive No. 29.1.1936.06

Perm. No. 329041. Temp. No. 2307. Photo Station #29. Water Retention Area. Showing check profile station established on untreated area under protection. 1/32-8"-G-CP. Photo by Cribbs, S.R.E.R. 6/15/36. Compare C-23. 115. Encl. #43.

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Photo Archive No. 29.1.1937.04

Perm. No. C-23. Photo Sta. No. 29. Water Retention Area. Profile Sta. and rain gage on untreated check area, fenced. There is a slight improvement in grass cover since 1936. 4/20/37. Compare 2307. 115. Encl. #43.

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Photo Archive No. 29.1.1985.06

PS-29. Azimuth 168. June 18, 1985. RFB. Canon AE-1 camera (35mm). 35mm WA lens. Robert F. Buttery.

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Photo Archive No. 29.1.2000.05

PS 29. May 15, 2000, 10:00 a.m. Facing south. Azimuth 168. Pasture 11A. ASA 135, Plus X film. 35mm lens focal length. Marked post inside exclosure; opening in exclosure created by fire. Burned in 1994. Ocotillo dead and on ground. Eragrostis lehmanniana, calliandra; mesquite topkilled in fire and resprouted. M. McClaran.

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Photo Archive No. 029.1.2007.03

PS. 029. 26 March 2007. Facing south, Azimuth 168. Pasture 11A. Study Area 43. Elevation 1125 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, most re-sprouting from 1994 fire. Calliandra common small shrub, leaves and flowers emerging. Dead ocotillo that was alive in 1985. Barrel cactus present. Lehmann lovegrass dominates, and cottontop and Setaria under larger mesquite. Compared to 2000, less grass and burroweed now, and vertical pipes that were placed in 1936 are now visible. M. McClaran photographer, M. McGregor assistant.

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Photo Archive No. 029.1.2010.03

PS. 029. 17 March 2010 12:55 PM. Facing south, Azimuth 165. Pasture 11A. Study Area 43. Elevation 1120 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, most re-sprouting from 1994 fire. Calliandra common small shrub. Dead ocotillo was alive in 1985. Barrel cactus present. Lehmann lovegrass dominates, and cottontop and Setaria under larger mesquite. Center midground mesquite in 1936 photo is probably the first tree left of the center tree; it was burned in the 1994 fire and has resprouted. Compared to 2007, missing Bouteloua aristidoides because of dry summer 2009. M. McClaran photographer, A. Dalke assistant.

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Photo Archive No. 029.1.2016.03

PS. 029. 15 March 2016 12:26 PM. Facing south, Azimuth 165. Pasture 11A. Study Area 43. Elevation 1120 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, most re-sprouting from 1994 fire. Calliandra common small shrub. Barrel cactus present. Also small cholla, one snakeweed, and one burroweed. Lehmann lovegrass dominates, and cottontop and Setaria under larger mesquite. Center midground mesquite in 1936 photo is probably the first tree left of the center tree; it was burned in the 1994 fire and has resprouted. Compared to 2010, ground cover has increased with Lehmann lovegrass. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 029.1.2022.03

PS. 029. 18 March 2022 11:20 AM. Facing south, Azimuth 165. Pasture 11A. Study Area 43. Elevation 1120 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Concrete-lined soil pit is 20 m East of camera. Mesquite alive, most re-sprouting from 1994 fire. Calliandra common small shrub, also find Janusia and Ericameria. Catclaw in the far left.Barrel cacti and prickly pear cacti present. Also small cholla, snakeweed, and burroweed. Lehmann lovegrass dominates and threeawn very common. Cottontop and Setaria under larger mesquite, and cottontop in the open as well. Black grama present. Mesquites still present in 1936 photo are still alive; they were top-killed in 1994 but resprouted from live roots. Livestock accessed the exclosure after fence was damaged in the 1994 fire. Compared to 2016, more shrub species recorded, black grama appears, prickly pear cactus appears, but no change in grass abundance. M. McClaran photographer, A. Gorlier assistant.

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