Cañón del Nacapule cuts into the southeastern flank of the Sierra El Aguaje, a rugged volcanic range about 20 kilometers northwest of Guaymas. Nacapule is included in the Sonoran segment of the...
Trees
Type of Content: Reports, Papers, Journal Articles
Fire is a dominant ecological process in almost all landscapes of La Frontera. Fire histories from throughout the region on the United States side of the border show that, before circa 1900,...
Type of Content: Reports, Papers, Journal Articles
Observations of the Sierra Madrean oak Quercus viminea in ten Sky Island mountain ranges 15 to 85 km south of the Arizona and New Mexico border in Sonora and Chihuahua help define the northern and...
Type of Content: Reports, Papers, Journal Articles
The southern half of the state of Arizona. may be briefly characterized as a relatively level plain studded with numerous hills and mountains. The plain rises from elevations of a few hundred feet...
Type of Content: Reports, Papers, Journal Articles
Maybe more than any other tree in our region, the velvet mesquite has a large impact on our landscape. This tree is both incredibly tenacious and invasive as well one of the most productive trees...
Type of Content: Species Profile
Canotia holacantha Torrey is reported from the Gulf of California, Mexico on Isla Tiburón. This population is isolated from its closest conspecifics in northern Sonora by 230 km and is best...
Type of Content: Reports, Papers, Journal Articles
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....
Type of Content: Image Content
February 2nd and 3rd 2011 laid a heavy hand on the NJP reserve. An arctic air mass descended on southwestern North America, stretching its influence south of its typical reach. Individual species...
Type of Content: Blog entry
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