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- W150482495 abstract "-Fire is an important disturbance that stimulates aspen regeneration and expansion in the western United States. We investigated the impacts of burning aspen-dominated habitats on landbird community structure in the western foothills of the Wind River Range, Wyoming. Habitat structure, breeding bird species composition, richness, and relative abundance were compared in 1994 and 1995 between six independent pairs of sites, each pair consisting of a recently burned aspen site and a control site. Burned sites typically had lower canopy cover and depth, greater snag densities and aspen regeneration, and less shrub growth. We observed 45 diurnal woodland bird species overall. Western Wood-Pewees (Contopus sordidulus) and Warbling Vireos (Vireo gilvus) were detected significantly less often in the burned sites, while Mountain Bluebirds (Sialia currucoides) and Pine Siskins (Carduelis pinus) were detected significantly more often in the burned sites. Orange-crowned Warblers (Vermivora celata), Red-naped Sapsuckers (Sphyrapicus nuchalis), and chickadees (Poecile spp.) were significantly less abundant in the burned aspen when burn size or year was factored into the analysis. For many other commonly detected species, we had relatively low power to detect meaningful differences in abundance between recently burned and unburned aspen stands. Bird species richness was similar between treatments. Bird species composition differed consistently among burned-control pairs, but our data suggested that intersite variability in species composition in aspen is the norm in the absence of burning. EFECTOS DE QUEMA RECIENTE EN LA ESTRUCTURA REPRODUCTIVA DE LA COMUNIDAD DE AVES EN BOSQUES DE POPULUS Sinopsis.-El fuego es un importante factor de disturbios que estimula la regeneraci6n y expansi6n de drboles de Pcpulus en los Estados Unidos occidentales. Investigamos el impacto de quemar habitats dominados por los Populus en la estructura comunal de aves en las laderas occidentales de la Cordillera de Wind River en Wyoming. La estructura del habitat, la composici6n de especies en reproducci6n, la riqueza y la abundancia relativa de especies de aves se compararon en 1994 y 1995 entre seis pares de lugares independientes, cada par consistente de una localidad de Populus recien quemada y un area control. Las localidades quemadas tenian en general una cubierta y profundidad de dosel menor, mayor densidad de tocones y regeneraci6n de drboles de Populus, y menor crecimiento de arbustos. Observamos un total de 45 especies de aves de bosque. Se detectaron significativamente menos Contopus surdidulus y Vireo gilvus en las areas quemadas, mientras que Sialis currucoides y Carduelis pinus se detectaron signitivamente mds a menudo en estas areas. Aves de Vermivora celata, Sphyrapicus nuchalis y del genero Poecile fueron significativamente menos abundantes en las areas quemadas cuando el tamaflo de la quema o el afio fu6 un factor analizado. Tuvimos una potencia para detectar diferencias en abundancia de aves entre setos quemados y control relativamente pobre para muchas otras especies comunmente detectadas. La riqueza de especies fue similar entre tratamientos. La composici6n de especies difirieron considerablemente entre pares de areas quemadas-control, pero nuestros datos sugieren que; a variabilidad en composici6n de especies entre lugares en Populus es la norma en la ausencia de la quema. Forests dominated by trembling aspen (Populus tremuloides) provide Current address: 403 Deer Rd. Evergreen, Colorado 80439 USA." @default.
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- W150482495 date "1999-01-01" @default.
- W150482495 modified "2023-09-24" @default.
- W150482495 title "Effects of recent burning on breeding bird community structure in aspen forests" @default.
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