Thorn-scrub
Thornscrub before and after heavy February 2011 frost
These photos were taken by Aaron Flesch before and after the February 2 and 3, 2011 frost. This unusually severe frost event was the worst freeze seen across Sonora and Arizona at least 50 years. Many species and vegetation communities were heavily effected.
These photos were taken in July 2009 (top) and July 2012 (bottom). One can see dramatic changes in vegetative cover in the foreground, as well as on hill-slopes in the background.
La Morita rapid on the Rio Aros, Dec. and July comparison
Photo comparison of La Morita rapid on the Rio Aros in both December 2011 and July 2012. December flows were high for the time of year and July flows were near average.
Flows in late spring and early summer are so low that the run in the foreground is completely non-existant (dry). What flow there is on the other side of the river moves between and mostly under the house-sized boulders.
