02324nas a2200169   4500008004100000245010600041210006900147260005400216300000800270520166200278653001401940653001801954653001401972653001001986100002001996856013802016       2004                        eng d00aRevisiting Aldo Leopold's "Perfect" Land Health: Conservation and Development in Mexico's Rio Gavilan0 aRevisiting Aldo Leopolds Perfect Land Health Conservation and De  aDenton, TexasbUniversity of North Texasc2004///  a2993 aThe Rio Gavilan watershed, located in Mexico 's northern Sierra Madre Occidental , has significance in conservation history. Upon visiting the remote, largely un­developed watershed during two hunting trips in the 1930s, renowned conservationist Aldo Leopold thought it was the best picture of land health he had seen. His main indicators of healthy land were slow water runoff rates regulating erosion and historical predator-prey relationships. The visits confirmed Leopold's concept of land health, inspired many of his essays, and helped shape his land ethic. Leopold proposed the area as a control site to research healthy land throughout North America . The proposal never went forward and the area has since been more intensively logged and grazed. This dissertation research used extensive literature review, archives, oral histories, citizen surveys, and rapid assessment of forest, rangeland, riparian, and socioeconomic health to assess impacts of past cultures and update the area's land health status. Projects that could restore land health, such as linked eco-tourism, forest density reduction, and rotational grazing, were assessed for feasibility. Recent critiques of Leopold's land ethic were also reviewed. Results indicate most pre-1940s impacts were light, current land health status is moderate, and local interest exists in restoring land health. Many fish and wildlife populations are reduced, temporarily stabilized, but still at risk. Soil and riverbed erosion, service sector economics, and (at some ridge-top sites) forest density are the land health indicators in worst condition. Land health restoration projects are feasible.10aChihuahua10aMexican trout10aRio Yaqui10atrout1 aForbes, William  uhttps://truchasmexicanas.myspecies.info/content/revisiting-aldo-leopolds-perfect-land-health-conservation-and-development-mexicos-rio00604nas a2200205   4500008004100000245008900041210006900130260001600199300001200215490000700227653001400234653001800248653001400266653001300280653002800293653001000321100002100331700002000352856002600372       2006                        eng d00aFollowing in Leopold's Footsteps: Revisiting and Restoring the Rio Gavilan Watershed0 aFollowing in Leopolds Footsteps Revisiting and Restoring the Rio  c2006/01/01/  a25 - 310 v2410aChihuahua10aMexican trout10aRio Yaqui10ariparian10aSierra Madre Occidental10aYaqui1 aFleming, William1 aForbes, William  uhttp://er.uwpress.org