The Pennsylvanian Naco Formation in the southeastern Dripping Spring Mountains near Winkelman, Arizona, consists of a lower dolomite member and an upper limestone member.
The purpose of this process memorandum is to summarize the most recent water balances for all alternatives. These water balances replace those in the previous process memorandum.
We examined the spatial distribution of soil nutrients in desert ecosystems of the southwestern United States to test the hypothesis that the invasion of semiarid grasslands by desert shrubs is associated with the development of "islands of fertility" under shrubs.
The abundance of tamarisk (Tamarix ramosissima and related species) along the San Pedro and Gila River flood plains varies with differences in stream flow regimes.
We, the U.S. Fish and Wildlife Service (Service), list the Gila chub (Gila intermedia) as endangered with critical habitat under the Endangered Species Act of 1973, as amended (Act).
Under the National Environmental Policy Act (NEPA), the Agency conducts environmental analyses to assess the nature and importance of the physical, biological, social, and economic effects of a proposed action and its reasonable alternatives.
The Assessment Report presents and evaluates existing information about relevant ecological, economic, and social conditions, trends, and risks to sustainability and their relationship to the 1985 Tonto National Forest Land and Resource Management Plan, within the context of the broader landscape.
Dodder, Cuscuta species, is a parasitic annual plant that infests many crops, ornamentals, native plants, and weeds. More than 150 species occur worldwide, although dodder is most prevalent in the Americas.
