Concern has been expressed that mesquite bosques are disappearing or diminishing in quality, and that the survival of the mesquite mouse is consequently threatened. This study, funded by a grant from the Arizona Heritage Fund to the Pima County Regional Flood Control District, investigated the current distribution of the mesquite mouse by reviewing historical records from museum specimens, examining existing potential habitat at historic locations of the species and elsewhere in the county, and conducting a live-trapping study at 19 sites representing a range of ecological communities with mesquite as a major component.

Four major statewide "tools" to help manage growth and preserve open space have been put to work in Arizona over the past five years. These include the Arizona Preserve Initiative and the closely-related Proposition 303, as well as the Growing Smarter Act and its "addendum," Growing Smarter Plus. All four tools are based in large part on a concept known as "smart growth," which is generally considered to be a set of growth management measures that attempt to strike a balance among issues of economics, environment, and quality of life. Taken together, these four growth management tools make significant changes in the way that (a) city and county governments plan and regulate their lands, (b) citizens play a role in land use issues, (c) state trust lands are managed, and (d) open space may be acquired and preserved. Many of these changes will have long-term effects for the state. This paper provides a brief overview of each of the four growth management/open space tools, a preliminary accounting of major activities each one has stimulated, and a perspective on what can be expected for the future as expressed by a selection of growth planners and other leaders of growth management in Arizona.