CAP LTER investigators are testing the hypothesis that distinct biogeochemical pathways result from elevated inorganic nitrogen and organic carbon deposition from the atmosphere to the land.

CAP LTER has been using a standardized point-count protocol to monitor the bird population in the greater Phoenix metropolitan area and surrounding Sonoran Desert region since 2000.

The atmospheric deposition monitoring program is designed to explore patterns of material deposition across the greater Phoenix metropolitan area and surrounding Sonoran Desert.