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Photo Station #180



MAR381_1 MAR 1938 1

Photo Archive No. 180.1.1938.03.1

C-221. P.S. 180. Study Area #133, NE corner contour trenching area, 18 inch contours. Rg main grass with approximately 0.01 density. Very badly depleted. Good stand of burroweed. Photo prior to trenching. See C-266. 3/10/38. 301.

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MAR381_2 MAR 1938 1

Photo Archive No. 180.1.1938.03.2

C-266. P.S. 180. Study Area #133. Northeast corner of 18 inch contour furrow area. See C-221. 3/28/38. 301.

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NOV20001 NOV 2000 1

Photo Archive No. 180.1.2000.11

PS 180. November 21, 2000, 10:35 a.m. Facing southwest. Pasture 2S. ASA 125 Plus X film. 35mm lens focal length. About 50 paces west of road 486. Dominant grass is Eragrostis lehmanniana; some Gutierrezia sarothrae; under large mesquite are Muhlenbergia porteri, Digitaria californica and some burroweed. Rocks are on ground surface to right of large mesquite; they were exposed by root-plowing in 1938. M. McClaran.

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180_1_2007_03 MAR 2007 1

Photo Archive No. 180.1.2007.03

PS. 180. 23 March 2007. Facing southwest, Azimuth 210. Pasture 2SW. Elevation 1126 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive, less than half of burroweed dead. Prickly pear present. Scattered snakeweed. Small Lehmann lovegrass dominate open areas. Cottontop, bush muhly and Setaria under larger mesquite. Cloudy conditions. Compared to 2000, less burroweed now. M. McClaran photographer, no assistant.

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180_1_2009_03 MAR 2009 1

Photo Archive No. 180.1.2009.03

PS. 180. 17 March 2009. Facing southwest, Azimuth 210. Pasture 2SW. Elevation 1126 m. ISO 100, 35mm focal length, Canon 5D Digital Camera. Witness present, camera above. Mesquite alive. Burroweed present. Prickly pear present. Scattered snakeweed. Lehmann lovegrass dominant grass. Cottontop, bush muhly and Setaria under larger mesquite. Velvet pod mimosa in midground far left, was present in 2007 as well. Trees present in 1938 photo are still present, and two of those are visible in this photo. Very little change since 2007. M. McClaran photographer, A. Peterson assistant.

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180_1_2015_03 MAR 2015 1

Photo Archive No. 180.1.2015.03

PS. 180. 18 March 2015. 11:19 am. Facing southwest, Azimuth 210. Pasture 2SW. Elevation 1126 m. ISO 320, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive, and leaves emerging. Snakeweed and Calliandra (flowering) are dominant subshrubs. Burroweed, Janusia and Prickly pear present. Lehmann lovegrass dominant grass. Cottontop, bush muhly and Setaria under larger mesquite, also black grama present in open areas. Velvet pod mimosa in midground far left. Trees present in 1938 photo are still present, and two of those are visible in this photo. Watch for small cholla beneath snakeweed in center. Compared to 2009, more snakeweed, less burroweed, less grass, and less prickly pear. M. McClaran photographer, K. Hawkes assistant.

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180_1_2021_03 MAR 2021 1

Photo Archive No. 180.1.2021.03

PS. 180. 12 March 2021. 10:43 am. Facing southwest, Azimuth 210. Pasture 2SW. Elevation 1126 m. ISO 160, 35mm focal length, Canon 5D Mark II Digital Camera. Witness present, camera above. Mesquite alive. Snakeweed and Calliandra are dominant subshrubs. Burroweed, Janusia and Prickly pear present. Lehmann lovegrass dominant grass. Cottontop, bush muhly and Setaria under larger mesquite, also black grama (near witness post) present in open areas. Velvet pod mimosa in midground far left. Trees present in 1938 photo are still present, and two of those are visible in this photo. 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 snakeweed and prickly pear; less burroweed; more grass, especially Lehmann lovegrass and cottontop; and size increase of cholla beneath snakeweed in center. M. McClaran photographer, A. Gorlier assistant.

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Last updated - December 2021
Mitchel McClaran - mcclaran@u.arizona.edu