In the Shadow of the Wall, a two-part Defenders of Wildlife report, explores these and other conservation consequences of extending the wall along the U.S.-Mexico border in detail. Part I: Wildlife, Habitat and Collaborative Conservation at Risk… See more
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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 Gulf Coast subdivision of the Sonoran Desert. The bi-… See more
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Climatic flux together with anthropogenic changes in land use and land cover pose major threats to wildlife, but our understanding of their combined impacts is limited. In arid southwestern North America, ferruginous pygmy-owls (Glaucidium… See more
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In the course of a revision of the New World Ebenaceae for "Flora Neotropica" and some regional floras, specimens from ca. 100 herbaria have been studied. Diospyros reinae, a new species from Sonora (northwestern Mexico) is described here. The taxa… See more
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2015 brief on Phrynosoma cornutum in Sonora and SE Arizona.
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The Mexico Tortoise Project, 2001-2013 We surveyed 43 localities in Sonora and Sinaloa, Mexico during 2005-2013 to collect information on the status, ecology, and genetics of desert tortoises (Gopherus morafkai). We measured and photographed… See more
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For many reasons, Sonora has historically been rather isolated from the rest of Mexico. It is the farthest state from Mexico City and long viewed by the country’s strong central government as a “frontier region” or, worse, a dry desert wasteland.… See more
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(Parent paper is here) Overview of Appendix This appendix contains the conceptual models and ecological status assessment results for the species selected as conservation elements (CEs) for the Madrean Archipelago REA. Appendix A describes the… See more
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Executive Summary This executive summary describes the breadth of the entire Madrean Archipelago (MAR) Rapid Ecoregional Assessment (REA) and illustrates examples from all of the products. It does not summarize methods but instead focuses on… See more
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Projected changes in global rainfall patterns will likely alter water supplies and ecosystems in semiarid regions during the coming century. Instrumental and paleoclimate data indicate that natural hydroclimate fluctuations tend to be more energetic… See more
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The Sierra de Bacadéhuachi is a poorly sampled extension of the Sierra Madre Occidental (SMO) located in east-central Sonora near the town of Bacadéhuachi. Sampling of moths using mercury vapor and ultraviolet lights occurred in summer and fall… See more
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This presentation is meant to stimulate action by informing others of the nature of our goals and the urgency of the need for persons with the expertise in real estate law and land acquisition to engage our problem. For the last 12 years, the… See more
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