RESUMEN Vivimos en el Antropoceno. La superficie completa de la tierra ha sido impactada por la actividad humana y nuestro uso del suelo. En este con- texto, la mayoría de los pastizales en zonas áridas y semiáridas tienen procesos de… See more
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Sonora has a rich natural diversity, including reptiles and amphibians. Sonora’s location on the United States-Mexico border creates some unique conservation challenges for its wildlife. We compiled a list of the amphibian and reptile species… See more
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The flora of the lower Río Bavispe Valley from the Huásabas area south to the Río Áros at 430 to 1,510 m. elevations (1,410 to 4,954 ft.) was studied from 1995 to 2016. A total of 401 plant taxa in 74 families and 274 genera were recorded in the… See more
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Aim: To evaluate changes in breeding bird communities and assess implications for conservation. Location: Madrean Sky Islands and northern Sierra Madre Occidental, Mexico. Methods: I compared observations from recent fieldwork (2009–2012) with an… See more
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To address obligations linked to the recently approved Pima County Multi-species Conservation Plan, I identified and estimated the quality of habitat for the Cactus Ferruginous Pygmy-Owl (Glaucidium brasilianum cactorum; hereafter “pygmy-owls”) and… See more
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Mexico is recognized globally as a mega-diversity country. The state of Sonora has very diverse fauna, fora, and vegetation. The diversity of horned lizards in the genus Phrynosoma (Phrynosomatidae) in the state of Sonora is a reflection of the… See more
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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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The Rock Horned Lizard (Camaleón de Piedra, in Spanish), Phrynosoma ditmarsi, is a poorly known Mexican endemic species with a distribution restricted to the state of Sonora. The International Union for Conservation of Nature (IUCN) has categorized… 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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In this paper, we describe and present the results of our effort to establish a spatial delineation of the Mogollon Highlands region—an ecologically fascinating North American transition zone of continental importance. is dramatic landscape of… See more
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Boundary Surveys The Treaty of Guadalupe Hidalgo in 1848 at the end of the United States-Mexico War established the boundary between the two nations, and expanded the United States to the Pacific Ocean. In 1853, the Gadsen Purchase added the area… 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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