The Altar Valley Conservation Alliance is a collaborative conservation organization founded in 1995, and incorporated as a 501(c)3 not-for-profit organization. Just southwest of Tucson, Arizona, the Altar Valley comprises approximately 610,000 acres of Sonoran desert grassland, some of the most biologically rich and ecologically threatened biotic communities in the world. Private ranches work side by side with federal, state and local agencies to manage the valley, which is the largest unfragmented watershed in Pima County, outside of the Tohono O’odham Nation to the west. This collection is an archive of reports and other documents specific to Alliance activities.
Ecological and Biological Diversity of National Forests in Region 3
The Nature Conservancy
This report is a summary of numerous biological and ecological assements from Arizona and New Mexico whose intended purpose was to inform the United States Forest Service as it worked to update its Forest Management Plan. The five focus areas of the report include the extent and distribution of natural vegetation types, low-elevation grasslands, and stream reaches with native fish, as well as the species richness and conservation status of all species in the forest, and the identification of priority areas for biodiversity. Region 3 includes parts of the Altar Valley and the Baboquivari Mountains.