Birds of the Barranca de Cobre Region of Southwestern Chihuahua, Mexico

Stager, Kenneth E.

doi:10.2307/1364884

Cited by 15 publications

(9 citation statements)

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“…A nest in adjacent Nuevo Le6n had three incubated eggs on 4 May 1972 (Hubbard and Crossin 1974). An incubating female was taken from a nest in extreme southwestern Chihuahua 15 May 1950 (Stager 1954). Apparently laying is in mid-April, with hatching in May in northern Mexico.…”

Section: Clutch Initiation and Layingmentioning

confidence: 99%

Flammulated, boreal, and great gray owls in the United States: A technical conservation assessment

Hayward¹,

Verner²

1994

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Flammulated (Otus flammeolus), boreal (Aegolius funereus), and great gray (Strix nebulosa) owls occur over a broad portion of North America and each is designated as a "sensitive species" in four or more USDA Forest Service regons. The insectivorous flammulated owl is a neotropical migrant requiring suitable wintering habitat in the extreme southwestern United States, Mexico, and Central America as well as breeding habitat in the mountains of the western United States. Flammulated owls breed predominantly in yellow-pine (Pinus ponderosa and Pinus jefieyi) forests and are cavity nesters. The mature and older ponderosa pine forests used as breeding habitat by flammulated owls have changed during the past century due to fire management and timber harvest. In contrast, the boreal owl is a nomadic, small mammal specialist that occurs as an "island" species occupying subalpine and boreal forests. Movements among populations are probably important to boreal owl persistence, and coordinated management of disjunct populations in different Forest Service regions may be important. While the boreal owl's high altitude spruce-fir forests have remained relatively undisturbed in the past, they are coming under increasing harvest pressure as the stock of lower elevation older stands are depleted or reserved. Great gray owls in the western United States occur in mid to high elevation conifer forests. These owls usually nest in mature and older forest stands using existing raptor nests or tops of broken trees and snags for a nest platform. The species' requirement of a secure nesting platform leads to one potential ecological limitation on population size. Prey availability is the other factor thought to limit populations. Flammulated and boreal owls may face significant conservation problems in the absence of conservation planning. Both owls are associated with older forest habitats. Limited research on these species indicates that their demography and life history coupled with their fairly narrow habitat associations make them vulnerable to habitat change. Current forest management practices in many areas (i.e., stand replacement systems) remove quality habitat for these species. Therefore, on at least a local basis, persistence of these species could be in jeopardy, even in the short term. Long-term concerns are greater because the habitats that seem most important to these species require one to two centuries to regenerate. Furthermore, the population biology of both species necessitates across-region planning to facilitate effective conservation planning. Based on limited information, the persistence of great gray owl populations in the United States over both the short and long-term is more certain. Great gray owl foraging habitat use is more compatible with current forest management practices. Our understanding of the ecology and biology of these three species is not sufficient to produce a conclusive assessment of their conservation status. The enclosed assessments, however, give a sufficiently clear picture of ea...

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Section: Clutch Initiation and Layingmentioning

confidence: 99%

Flammulated, boreal, and great gray owls in the United States: A technical conservation assessment

Hayward¹,

Verner²

1994

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“…Autor y año Stager (1954) ucdf (1990) Lafón et al (1996) Young (1996) Alianza Sierra Madre (2000); Miller y Mancera (2000) Bolaños ( 2001) Bolaños (2005) y…”

Section: Importancia Y Usosunclassified

La biodiversidad en Chihuahua : estudio de estado

Barajas¹,

Angón²,

Fernández³

et al. 2014

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Total 3 131 término ecosistema tiene su origen en la cultura occidental, en civilizaciones tradicionales existen conceptos parecidos que los pueblos ancestrales han acuñado para expresar la complejidad del entorno natural en el que desarrollan sus actividades (Berkes et al. 1998). Cabe señalar que, al igual que el concepto de especies, es un término que no se ha librado de controversias y discusiones científicas y filosóficas constantes (Gignoux et al. 2011). El Convenio sobre la Diversidad Biológica (cdb) formula la siguiente definición de ecosistema: "[es] un complejo dinámico de comunidades vegetales, animales y de microorganismos y su medio no viviente que interactúan como una unidad funcional" (cdb 1992), la cual, para efectos de una definición sencilla y aprobada por 193 países, puede resultar práctica. 72 918 7 305 322 856 4.49 Estado (total/promedio) 247 455 12 141 3 241 444 13.1 Fuente: elaboración propia con datos de Murillo 2007.Fuente: elaboración propia con datos de Murillo 2007.Cuadro 10. Eventos de educación, capacitación y difusión en materia ambiental relacionados con la biodiversidad, los cuales impulsó la delegación de la semarnat en Chihuahua durante el periodo 2004-2007. Evento Año Localidad Curso-taller "Programa Globe". Se impartió a docentes de diversas instituciones educativas del estado

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“…, Monterrubio‐Rico and Enkerlin‐Hoeflich , González‐Rojas et al. ), with gaps of knowledge increasing to the south in more humid regions of the SMO (Stager , Medina‐Macías et al. , Flesch et al.…”

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confidence: 99%

“…Since then, studies of breeding birds in the Madrean Sky Islands have focused almost entirely on the United States (e.g., Balda 1969, Corman and Wise-Gervais 2005, Kirkpatrick et al 2006, and those in Mexico remain either largely qualitative (Flesch andHahn 2005, Flesch 2008) or of limited spatial and taxonomic scope (Landres and Mac-Mahon 1983). Similarly, studies in the neighboring northern SMO have focused on a few species of concern such as Thick-billed Parrots (Rhynchopsitta pachyrhyncha), Spotted Owls (Strix occidentalis lucida), and Eared Quetzals (Euptilotis neoxenus; Lanning and Shiflett 1983, Young et al 1998, Monterrubio-Rico and Enkerlin-Hoeflich 2004, Gonz alez-Rojas et al 2008, with gaps of knowledge increasing to the south in more humid regions of the SMO (Stager 1954, Medina-Mac ıas et al 2010, Flesch et al 2015. Thus, although we know pine-oak woodland supports a rich community of breeding birds in this region of Mexico, and understand habitat use by some species in the region based largely on work in the United States (Stromberg 1990, Hall and Mannan 1999, Conway and Kirkpatrick 2007, Kirkpatrick and Conway 2010, Ganey et al 2015, the abundance and habitat relationships of breeding birds have not been assessed quantitatively at large scales or across a full range of montane vegetation communities and breeding species in Mexico.…”

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confidence: 99%

Abundance and habitat relationships of breeding birds in the Sky Islands and adjacent Sierra Madre Occidental of northwest Mexico

Flesch

Sánchez²,

Amarillas³

2016

J. Field Ornithol.

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ABSTRACT. The Sierra Madre Occidental and neighboring Madrean Sky Islands span a large and biologically diverse region of northwest Mexico and portions of the southwestern United States. Little is known about the abundance and habitat use of breeding birds in this region of Mexico, but such information is important for guiding conservation and management. We assessed densities and habitat relationships of breeding birds across Sky Island mountain ranges in Mexico and adjacent portions of the Sierra Madre from 2009 to 2012. We estimated densities at multiple spatial scales, assessed variation in densities among all major montane vegetation communities, and identified and estimated the effects of important habitat attributes on local densities. Regional density estimates of 65% of 72 focal species varied significantly among eight montane vegetation communities that ranged from oak savannah and woodland at low elevations to pine and mixed-conifer forest at high elevations. Greater proportions of species occurred at peak densities or were relatively restricted to mixedconifer forest and montane riparian vegetation likely because of higher levels of structural or floristic diversity in those communities, but those species were typically rare or uncommon in the Sky Islands. Fewer species had peak densities in oak and pine-oak woodland, and species associated with those communities were often more abundant across the region. Habitat models often included the effects of broadleaf deciduous vegetation cover (30% of species), which, together with tree density and fire severity, had positive effects on densities and suggest ways for managers to augment and conserve populations. Such patterns combined with greater threats to highelevation conifer forest and riparian areas underscore their value for conservation. Significant populations of many breeding bird species, including some that are of concern or were not known to occur regionally or in mountain ranges we surveyed, highlight the importance of conservation efforts in this area of Mexico.RESUMEN. Abundancia y relaciones de h abitat de aves reproductivas en las Islas del Cielo y la contigua Sierra Madre Occidental del noroeste de M exico La Sierra Madre Occidental y las vecinas Islas del Cielo Madrenses abarcan una extensa y biol ogicamente diversa regi on del noroeste de M exico y porciones del sudoeste de Estados Unidos. Poco se sabe sobre la abundancia y el uso de h abitat de las aves que cr ıan en esta regi on de M exico, pero dicha informaci on es importante para guiar la conservaci on y el manejo de la zona. Evaluamos densidades y relaciones de h abitat de aves reproductoras a lo largo de las cadenas montañosas de las Islas del Cielo en M exico y puntos adyacentes de la Sierra Madre desde el 2009 al 2012. Estimamos densidad a m ultiples escalas, analizando la variaci on en la densidad entre las principales comunidades vegetales montanas, e identificamos y estimamos los efectos de importantes atributos de h abitat en las densidades locales. Estimaciones de densidad ...

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Birds of the Barranca de Cobre Region of Southwestern Chihuahua, Mexico

Cited by 15 publications

References 0 publications

Flammulated, boreal, and great gray owls in the United States: A technical conservation assessment

Flammulated, boreal, and great gray owls in the United States: A technical conservation assessment

La biodiversidad en Chihuahua : estudio de estado

Abundance and habitat relationships of breeding birds in the Sky Islands and adjacent Sierra Madre Occidental of northwest Mexico

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