Santa Rita Experimental Range
Repeat Photography

Photo Station #304

Photo Archive No. 304.1.1949

A49-97. Photo station 304 looking southeast. Agl, Tca, Adi, Hca, Afr, Bwr, Pve, cacti. Grasses in fair condition, though good many dead clumps.

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Photo Archive No. 304.1.1988.01

PS 304. Azimuth 168. Jan. 8, 1988. RFB. Canon AE-1 35mm camera. 35mm WA lens. Robert F. Buttery.

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Photo Archive No. 304.1.2000.04

PS 304. April 24, 2000, 2:15 p.m. Facing south. Azimuth 168. Pasture 21. ASA 135, Plus X film. 35mm lens focal length. Fencepost marked with 304; south side of road about 40'; near road to weather station. All mesquite alive. Eragrostis lehmanniana dominant. Muhlenbergia porteri under small mesquite in foreground. Scattered Haplopappus tenuisectus. Setaria macrostachya, Digitaria californica, Sporobolus, Muhlenbergia porteri under large mesquite. M. McClaran.

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Photo Archive No. 304.1.2007.03

PS. 304. 28 March 2007. Facing south, Azimuth 168. Pasture 21. Elevation 1245 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, about 50% of burroweed dead. Prickly pear and barrel cacti present. Small Lehmann lovegrass dominant with cottontop, under mesquite find cottontop, Setaria, Sporobolus cryptandrus and bush muhly. Compared to 2000, less grass and burroweed, but more prickly pear now. M. McClaran photographer, A. Nafus assistant.

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Photo Archive No. 304.1.2012.03

PS. 304. 12 March 2012, 2:05 PM. Facing south, Azimuth 168. Pasture 21. Elevation 1240 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, and some 2011 leaves still present. Many burroweed skeletons. Prickly pear and barrel cacti present. Lehmann lovegrass dominant with cottontop, under mesquite find cottontop, plains bristlegrass, sand dropseed, black grama, and bush muhly. Compared to 2007, more grass, more small mesquite, and more prickly pear now; but continued decline of burroweed; and erosion channel in left foregrounds has filled. M. McClaran photographer, A. Dalke and K. Hawkes assistants.

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Photo Archive No. 304.1.2018.03

PS. 304. 05 March 2012, 1:10 PM. Facing south, Azimuth 168. Pasture 21. Elevation 1240 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. This area burned in April 2017 Sawmill fire (arson). Mesquite alive, and some 2017 leaves still present. Many burroweed skeletons. Prickly pear, cholla and barrel cacti present. Lehmann lovegrass dominant with threeawn and tanglehead, under mesquite find cottontop, plains bristlegrass, Boers lovegrass, and bush muhly. Compared to 2012, less grass cover following 2017 fire (note many dead plants with dark, burned base), but many new plants of Lehmann lovegrass; sand dropseed and black grama no longer present. M. McClaran photographer, K. Landreville assistant.

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Photo Archive No. 304.2.1949

A49-96. 1949. Photo station 304 looking southwest.

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Photo Archive No. 304.2.2000.04

PS 304. April 24, 2000, 2:15 p.m. Facing southwest. Azimuth 210. Pasture 21. ASA 135, Plus X film. 35mm lens focal length. Fencepost marked with 304; south side of road about 40'; near road to weather station. Large trees in 1948 cut down, stumps present. IBP rain gauge present. All Eragrostis lehmanniana; few Haplopappus tenuisectus. All mesquite alive, beginning to leaf out. M. McClaran.

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Photo Archive No. 304.2.2007.03

PS. 304. 28 March 2007. Facing southwest, Azimuth 210. Pasture 21. Elevation 1245 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, about 50% of burroweed dead. Prickly pear and barrel cacti present. Small Lehmann lovegrass dominant with cottontop and tanglehead, under mesquite find cottontop, Setaria and Sporobolus cryptandrus. At center midground there are stumps of 2 large mesquite that were present at top center of 1949 photo were probably cut in 1960s for D. Cable’s soil moisture study, and adjacent to those stumps find soil access tubes and increasing distance from stump. Compared to 2000, less grass and burroweed, but more small mesquite and prickly pear now. M. McClaran photographer, A. Nafus assistant.

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Photo Archive No. 304.2.2012.03

PS. 304. 12 March 2012, 2:00 PM. Facing south, Azimuth 210. Pasture 21. Elevation 1240 m. ISO 100, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, and some 2011 leaves still present. Many burroweed skeletons. Prickly pear, cholla and barrel cacti present. Lehmann lovegrass dominant, with cottontop, black grama and tanglehead in open, and under mesquite find cottontop, plains bristlegrass and sand dropseed. At center midground there are stumps of 2 large mesquite that were present at top center of 1949 photo were probably cut in 1960s for D. Cable’s soil moisture study, and adjacent to those stumps find soil access tubes at increasing distance from stump. Compared to 2007, more grass and prickly pears, and increase in size of small mesquite; and continued decline of burroweed. M. McClaran photographer, A. Dalke and K. Hawkes assistants.

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Photo Archive No. 304.2.2018.03

PS. 304. 05 March 2018, 1:10 PM. Facing south, Azimuth 210. Pasture 21. Elevation 1240 m. ISO 125, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. This area burned in April 2017 Sawmill fire (arson). Mesquite alive, and some 2017 leaves still present. Prickly pear and cholla present. Lehmann lovegrass dominant, with cottontop, black grama, threeawn and tanglehead in open, and under mesquite find cottontop, plains bristlegrass and sand dropseed. At center midground there are stumps of 2 large mesquite that were present at top center of 1949 photo were probably cut in 1960s for D. Cable’s soil moisture study, and adjacent to those stumps find soil access tubes at increasing distance from stump. Compared to 2012, less grass cover following 2017 fire (note many dead plants with dark, burned base), but many new plants of Lehmann lovegrass; prickly pear plants are larger. M. McClaran photographer, K. Landreville assistant.

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