Santa Rita Experimental Range
Repeat Photography

Photo Station #051

Photo Archive No. 051.1.1936.06

Perm. No. 329078. Temp. No. 2356. Photo Station #51, looking south and showing comparatively few burroweeds on this area at the present time. To be checked up later for possible spread of burroweed over this area. 2-32-8"-A-CP. Photo by Cribbs, S.R.E.R. 6/29/36. 400-B.

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Photo Archive No. 051.1.1951.07

July 1951. R-267. Santa Rita Experimental Range. Repeat of photo point 51. H.G. Reynolds. 10H3b.

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Photo Archive No. 051.1.1985.08

PS 51. Azimuth 200. Aug. 28, 1985. RFB. Canon AE-1 camera (35mm). 35mm WA lens. Robert F. Buttery.

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Photo Archive No. 051.1.2000.07

PS 51. July 6, 2000, 10:00 a.m. Facing south. Azimuth 200. Pasture 6A. ASA 125, Plus X film. 35mm lens focal length. Fencepost marked; on ridge, surrounded by catclaw. Grass is Eragrostis lehmanniana; Digitaria californica under mesquite. M. McClaran.

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Photo Archive No. 051.1.2007.03

PS. 051. 30 March 2007. Facing south, Azimuth 200. Pasture 6A. Elevation 1235 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, catclaw bottom center and right foreground, ocotillo with flowers emerging, Calliandra no leaves or flowers. Prickly pear, cholla, and barrel cacti. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, Setaria, sideoats grama; cottontop and bush muhly under larger mesquite. Larger trees from 1936 photo are present and behind ocotillo and small mesquite. In 1936 photo, plants on distant ridge are most likely large Celtis, catclaw, and graythorn plants; only occasionally mesquite. Compared to 2000, less grass, and more prickly pear. M. McClaran photographer, F. Mashiri assistant.

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Photo Archive No. 051.1.2009.03

PS. 051. 19 March 2009. Facing south, Azimuth 200. Pasture 6A. Elevation 1235 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, catclaw bottom center and right foreground, ocotillo with flowers emerging, Calliandra no leaves or flowers. Velvet pod mimosa in front right not yet with leaves. One burroweed next to collapsed prickly pear. Prickly pear, cholla, and barrel cacti. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, Setaria, sideoats grama; cottontop and bush muhly under larger mesquite. Larger trees from 1936 photo are present and behind ocotillo and small mesquite. In 1936 photo, plants on distant ridge are most likely large Celtis, catclaw, and graythorn plants; only occasionally mesquite. Compared to 2007, Lehmann lovegrass increase; grass increase generally; prickly pear decrease especially patch in center; and add tanglehead to grass list. The same trees that have first leaves in 2007, have first leaves this year. M. McClaran photographer, A. Peterson assistant.

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Photo Archive No. 051.1.2015.03

PS. 051. 19 March 2015. 10:16 am. Facing south, Azimuth 200. Pasture 6A. Elevation 1235 m. ISO 160, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, leaves emerging. Catclaw bottom center and right foreground is dead. Other catclaw leaves emerging. Ocotillo with leaves and flowers emerging, Velvet pod mimosa in front right has leaves emerging. One burroweed next to collapsed prickly pear. Prickly pear, cholla, mammallaria, and barrel cacti. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, cottontop, Setaria, sideoats grama, bush muhly; cottontop, bush muhly, and Setaria under larger mesquite. Larger trees from 1936 photo are present and behind ocotillo and small mesquite. In 1936 photo, plants on distant ridge are most likely large Celtis, catclaw, and graythorn plants; only occasionally mesquite. Compared to 2009, no burroweed found, less cholla, and less Lehmann lovegrass. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 051.1.2021.03

PS. 051. 22 March 2021. 10:50 am. Facing south, Azimuth 200. Pasture 6A. Elevation 1235 m. ISO 160, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive. Catclaw bottom center and right foreground is dead. Ocotillo and Calliandra with leaves and flowers emerging, Velvet pod mimosa in front right. Prickly pear and cholla cacti present. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, cottontop, Setaria, sideoats grama, bush muhly; cottontop, bush muhly, and Setaria under larger mesquite. Larger trees from 1936 photo are present and behind ocotillo and small mesquite. In 1936 photo, plants on distant ridge are most likely large Celtis, catclaw, and graythorn plants; only occasionally mesquite. Compared to 2015, following very dry and hot conditions between July 2020 and March 2021, very little grass production in summer 2020 and very little green grass present now; no burroweed, dead barrel cactus and fallen cholla skeletons, more cholla and prickly pear plants and larger prickly pear, more cottontop plants, less cholla, and less Lehmann lovegrass. M. McClaran photographer, A. Gorlier assistant.

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Photo Archive No. 051.2.1936.06

Perm. No. 329077. Temp. No. 2355. Photo Station #51, east of road leading up to East Tank and approximately 1/3 mile north of small hill north of East Tank. Looking southwest and showing comparatively few burroweeds at this point. 2-32-8"-A-CP. Photo by Cribbs, S.R.E.R. 6/29/36. 400-B.

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Photo Archive No. 051.2.1985.08

PS 51. Azimuth 248. Aug. 28, 1985. RFB. Canon AE-1 camera (35mm). 35mm WA lens. Robert F. Buttery.

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Photo Archive No. 051.2.2000.07

PS 51. July 6, 2000, 10:00 a.m. Facing west. Azimuth 248. Pasture 6A. ASA 125, Plus X film. 35mm lens focal length. Fencepost marked; on ridge, surrounded by catclaw. Grass is Eragrostis lehmanniana; Digitaria californica under mesquite. One dead burroweed in foreground-center died this year; otherwise, no other burroweed plants in area. M. McClaran.

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Photo Archive No. 051.2.2007.03

PS. 051. 30 March 2007. Facing west, Azimuth 248. Pasture 6A. Elevation 1235 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, scattered catclaw including foreground right , 90 burroweed alive, Zinnia common. Prickly pear and cholla cacti. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, sideoats grama, and cottontop; cottontop and bush muhly under larger mesquite. Large mesquite in 1936 photo are present and visible behind small mesquite in foreground. Large barrel in 2000 left foreground is not present and no evidence remains of past existence on site. Compared to 2000, less grass, and missing barrel cactus. M. McClaran photographer, F. Mashiri assistant.

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Photo Archive No. 051.2.2009.03

PS. 051. 19 March 2009. Facing west, Azimuth 248. Pasture 6A. Elevation 1235 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, scattered catclaw including foreground right and left. Zinnia and burroweed present. Prickly pear and cholla cacti. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, tanglehead, sideoats grama, and cottontop; cottontop, Setaria, and bush muhly under larger mesquite. Large mesquite in 1936 photo are present and visible behind small mesquite in foreground. Compared to 2007, more grass, especially Lehmann lovegrass and added Setaria and tanglehead to list; collapse of prickly pear under distant left mesquite and partial collapse of prickly pear in center midground; and small decline in cholla. The same trees that have first leaves in 2007, have first leaves this year. M. McClaran photographer, A. Peterson assistant.

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Photo Archive No. 051.2.2015.03

PS. 051. 19 March 2015. 10:22 am. Facing west, Azimuth 248. Pasture 6A. Elevation 1235 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, and leaves emerging. Scattered catclaw including foreground right and left, and they have leaves emerging. Zinnia present. Prickly pear and cholla cacti. Lehmann lovegrass is dominant grass, also find black grama, tanglehead, sideoats grama, and cottontop; cottontop, Setaria, and bush muhly under mesquite. Large mesquite in 1936 photo are present and visible behind small mesquite in foreground. Compared to 2009, less prickly pear, cholla, and Lehmann lovegrass; and no longer have burroweed. M. McClaran photographer, K. Hawkes assistant.

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Photo Archive No. 051.2.2021.03

PS. 051. 19 March 2021. 10:47 am. Facing west, Azimuth 248. Pasture 6A. Elevation 1235 m. ISO 160, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive. Scattered catclaw including foreground right. Velvet pod Mimosa at foreground left. Zinnia and Zizyphus (left of mesquite, midground slightly left) present. Prickly pear and cholla cacti. Lehmann lovegrass is dominant grass, also find black grama, sideoats grama, Aristida, and cottontop; cottontop, Setaria, and bush muhly under mesquite. Large mesquite in 1936 photo are present and visible behind small mesquite in foreground. Compared to 2015, following very dry and hot conditions between July 2020 and March 2021, very little grass production in summer 2020 and very little green grass present now; larger prickly pear; no tanglehead; new barrel cactus in midground; Aristida present; but Zizyphus was probably present in 2015. M. McClaran photographer, A. Gorlier assistant.

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