Large nesting birds threaten arboretum trees
نویسندگان
چکیده
منابع مشابه
Nest-site Selection and Nesting Success of Cavity-nesting Birds in High Elevation Forest Drainages
ABssAcr.-We identified habitat features that characterized successful and unsuccessful nest sites, nest sites vs. random sites, and differences among coexisting species of cavitynesting birds for 356 nests in central Arizona. Live and, more commonly, dead quaking aspens (Populus tremuloides) were used for 88% of all nest sites, but aspens constituted only 12% of all trees in random plots (n = 1...
متن کاملPatterns of Area Sensitivity in Grassland-Nesting Birds
Between 1995 and 1997, we studied breeding birds in fragments of native tallgrass prairie in southwestern Missouri to determine the effect of habitat fragmentation on grassland bird populations. Data on density and nesting success collected in 13 prairie fragments of various sizes revealed three levels of area sensitivity. The most area-sensitive species, Greater Prairie-Chicken ( Tympanuchus c...
متن کاملRegional forest fragmentation and the nesting success of migratory birds.
Forest fragmentation, the disruption in the continuity of forest habitat, is hypothesized to be a major cause of population decline for some species of forest birds because fragmentation reduces nesting (reproductive) success. Nest predation and parasitism by cowbirds increased with forest fragmentation in nine midwestern (United States) landscapes that varied from 6 to 95 percent forest cover ...
متن کاملThe Effects of Postfire Salvage Logging on Cavity-nesting Birds
We investigated the effects of postfire salvage logging on cavity-nesting birds by comparing nest densities and patterns of nest reuse over a three-year period in seven logged and eight unlogged patches of mixed-conifer forest in the Blackfoot-Clearwater Wildlife Management Area, Montana. We found 563 active nests of 18 cavity-nesting birds; all species were found nesting in the uncut burned fo...
متن کاملEuropean Starlings and Their Effect on Native Cavity-Nesting Birds
European Starlings ( Sturnus vulgaris ) were introduced to New York City in 1890 and have since become one of North America’s most common species. Starlings are aggressive competitors and commonly usurp cavities of other hole-nesting species. These characters make it a clear choice for a species whose invasion is likely to have significantly affected native cavity-nesting birds. Using Christmas...
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ژورنال
عنوان ژورنال: California Agriculture
سال: 2008
ISSN: 0008-0845
DOI: 10.3733/ca.v062n03p87