Santa Rita Experimental Range
Repeat Photography

Photo Station #149

Photo Archive No. 149.1.1937.08

PS. 149. 11 August 1937. Plot 108A. Taken from NW corner of cleared area. Gully in middle distance shows signs of healing. A good stand of annual grass. This area cleared of mesquite and burroweed during spring 1936 by CCC. Perm. No. 357826 C-111.

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Photo Archive No. 149.1.1960.04

PS. 149. 15 April 1960. 10H3b.

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Photo Archive No. 149.1.2003.04

PS. 149. 11 April 2003. Facing southeast. Film ASA 100 Plus X, 35mm focal length, Olympus OM-1 Camera. Negatives 5-7. All visible mesquite leaves are from 2002. Dominant grass is Lehmann lovegrass, some cottontop present. Shrubs are snakeweed, Zinnia, and burroweed. M. McClaran photographer, S. McClaran assistant.

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Photo Archive No. 149.1.2007.03

PS. 149. 12 March 2007. Facing south, Azimuth 180. Pasture 3. Elevation 1004 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness post present, camera above. Mesquite alive. Most, if not all, burroweed is dead. Scattered struggling snakeweed. Prickly pear, barrel, hedgehog, and cholla cacti. Many Zinnia. Cottontop is large grass in center. Bouteloua aristidoides and Lehmann lovegrass scattered throughout. Bush muhly and cottontop under foreground mesquite. Celtis behind 2 midground mesquite, and Lycium to left of that. Compared to 2003, much less burroweed and snakeweed, and little less grass. M. McClaran photographer, no assistant.

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Photo Archive No. 149.1.2011.03

PS. 149. 15 March 2011. 12:10 PM. Facing south, Azimuth 160. Pasture 3. Elevation 997 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness post present, camera above. Mesquite alive. Prickly pear, barrel, hedgehog, and cholla cacti. Cottontop is large grass in center, but is shorter because it was recently (last month) grazed. Scattered threeawns and Lehmann lovegrass. Bush muhly and cottontop under foreground mesquite. Celtis behind 2 midground mesquite, and Lycium to left of that. Compared to 2007, less Zinnia, and many very small burroweed and snakeweed plants. M. McClaran photographer, A. Dalke assistant.

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Photo Archive No. 149.1.2017.03

PS. 149. 15 March 2017. 12:05 PM. Facing south, Azimuth 165. Pasture 3. Elevation 997 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness post present, camera above. Mesquite alive. Prickly pear, barrel, hedgehog, and cholla cacti. Ephedra in wash far midground. Scattered threeawns, cottontop and Lehmann lovegrass. Bush muhly under foreground mesquite. Burroweed and snakeweed plants. Celtis behind 2 midground mesquite, and Lycium to left of that. Since 2011, more snakeweed, burroweed and Zinnia; growth of cholla and prickly pear; and lost large cottontop plant that was in center of image. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 149.1.2023.03

PS. 149. 07 March 2023. 2:30 PM. Facing south, Azimuth 165. Pasture 3. Elevation 997 m. ISO 200, 35mm focal length, Canon 5D Mark II Digital Camera. Witness post present, camera above. Mesquite alive. Prickly pear, barrel, hedgehog, and cholla cacti. Ephedra in center midground and in wash far midground. Scattered Aristida, cottontop, bush muhly, Rothrock grama, and Lehmann lovegrass. Bush muhly and Setaria under foreground mesquite. Celtis behind 2 midground mesquite, and Lycium to left of that. Burroweed and snakeweed plants. Compared to 2017, more grass cover and mass, mainly Aristida increased; larger and more cholla plants; more and larger burroweed and snakeweed plants; and Setaria is present. McClaran photographer, A. Gorlier assistant.

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