1. Tracking Range Change - Forty Years of Change in a Shadscale Stand
Intro to Range--OBJ 4: PPT
Tracking Range Change - Forty Years of Change in a Shadscale Stand
Repeat Photographic Monitoring
By Drs. Ken Sanders & Lee Sharp
University of Idaho

2. Intro to Range--OBJ 4: PPT
Background of Photos
The following rangeland photo journal charts the changes that have occurred in a shadscale (Atriplex confertifolia) stand in southern Idaho between 1951 and 2002.
Photos of the site have been taken annually since 1955, but the selected photos show the dynamic nature of the site.

3. Intro to Range--OBJ 4: PPT
1951
Beginning of study. Precipitation was about average during April, May and June of this year. This was the second year of a study by the University of Idaho on the halogeton problem in the state.

4. Intro to Range--OBJ 4: PPT
1955
Appearance of the state in 1955 after a very dry year in Halogeton had begun to appear in the stand.

5. 1958

6. 1959

7. 1960

8. 1961

9. 1962

10. 1963

11. Intro to Range--OBJ 4: PPT
1964
Note the globe mallow in this year of exceptional precipitation (3 times the spring average). This was one of the best globe mallow expressions in the 40 years of study.

12. 1966

13. 1967

14. Intro to Range--OBJ 4: PPT
1969
Even though the spring precipitation was above average, the time that it fell was apparently critical in determining how the vegetation looked.

15. 1970

16. Intro to Range--OBJ 4: PPT
1971
Squirreltail grass, globe mallow and cheatgrass were found with the shadscale. Cheatgrass was more prevalent after this year.

17. 1972

18. 1973

19. 1974

20. 1975

21. Intro to Range--OBJ 4: PPT
1976
Squirreltail grass was the dominant plant. Its red spikes observed the globe mallow and shadscale. There was also cheatgrass on the stand.

22. 1978

23. 1979

24. 1980

25. 1982

26. Intro to Range--OBJ 4: PPT
1983
The scale insect was causing some damage, as a lot of the plants had dead branches. Squirreltail grass and globe mallow were dominant in the stand. Cheatgrass is evident throughout the stand.

27. 1984

28. 1985

29. Intro to Range--OBJ 4: PPT
1986
The shadscale is mostly dead. Some seedlings of shadscale appeared in the understory. Cheatgrass, pepper grass, globe mallow, and Jim Hill mustard were present on the site.

30. 1987

31. 1989

32. Intro to Range--OBJ 4: PPT
1990
Spring precipitation was much impvoed over the previous year. Squirreltail grass, Sandberg bluegrass, and globe mallow were the principle perennial plants. Hologeton was the main annual plant in the area. Scatterd seedlings of shadscale were noticed this year.

33. Intro to Range--OBJ 4: PPT
1996

34. Intro to Range--OBJ 4: PPT
2002