Nesting Success and Behavior of Northern Harriers on a Reclaimed Surface Mine Grassland in Kentucky

Vukovich, Mark; Ritchison, Gary

doi:10.3356/0892-1016(2006)40[210:nsabon]2.0.co;2

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…Nest trees with wider crowns and higher densities of nearby canopy trees may better protect nestlings from inclement weather and increase concealment from potential predators. Although few investigators have measured tree crown width or canopy volume at raptor nests or in nesting areas (but see Crocker‐Bedford 1990, Penteriani et al 2002, Hobbs et al 2006), several have noted that greater nest concealment might provide protection from inclement weather and predators (Woodrey 1986, Schnell 1994, Morrison and Phillips 2000, Vukovich and Ritchison 2006). In addition, more open subcanopies may provide more flight lanes or enhance detection of potential prey (Bednarz and Dinsmore 1982, Boal et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Nest-site selection by Common Black-Hawks in southwestern New Mexico

Sadoti¹

2008

J Field Ornithology

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Despite the interest of resource managers and conservationists in the status of Common Black-Hawk (Buteogallus anthracinus) populations in the southwestern United States, little is known about their nesting success and habitat requirements. Because such information is essential for effective population and habitat management, I examined the nesting success and nest-site selection of Common Black-Hawks in southwestern New Mexico during 2000 and 2001. Of the 37 nesting attempts in 21 territories, ≥1 young fledged from 25 nests (68%). Comparison of nest-sites and nonused sites suggested that breeding Common Black-Hawks selected nest-sites in areas with a sparser and shorter subcanopy tree layer and in trees with a smaller trunk diameter and a greater minimum crown diameter. These differences appear to be related to variation in forest ages within territories, with nonused sites having fewer, but older, canopy trees than nest-sites. Sites with younger, smaller subcanopy trees may provide forest structure for more effective foraging, whereas the characteristics of younger nest tree canopies may reduce the risk of nest predation or offer more protection from inclement weather. Due to the limited range of this species in the southwestern United States, efforts to encourage the establishment and maturation of riparian forests in Common Black-Hawk breeding areas could be important in sustaining available nesting habitat and, in turn, maintaining or expanding current population levels. SINOPSIS. La selección del lugar de anidamiento por Buteogallus anthracinus en el sudeste del estado de Nueva MéxicoAunque existe interés de parte de profesionales en manejo de recursos y conservacionistas en el estatus de las poblaciones de Buteogallus anthracinus en el sudoeste de los Estados Unidos, poco se conoce sobre suéxito de anidamiento y requerimientos de hábitat. Por la razón que esta información es esencial para eléxito del manejo poblacional y del hábitat para esta especie, examiné eléxito de anidamiento y la selección del lugar de anidamiento de Buteogallus anthracinus en el sudeste del estado de Nueva México durante el 2000 y el 2001. De los 37 intentos de anidamiento en 21 territorios, ≥1 de los polluelos volaron de 25 nidos (68%). Una comparación entre lugares donde se ubicaban los nidos y sitios no utilizados para anidar indica que individuos seleccionaron lugares para anidar enáreas con una menor cobertura y una menor altura del sub-dosel. Adicionalmente, los nidos fueron ubicados eń arboles con un menor diámetro del tronco y con un mayor diámetro mínimo de la corona. Estas diferencias parecen ser relacionadas a la variación en la edad del bosque dentro de los territorios, con sitios no utilizados caracterizados por un número menor deárboles del dosel pero las cuales tienen una edad mayor que losárboles del dosel en los sitios donde se ubicaron los nidos. Sitios conárboles en el sub-dosel de menor edad y de menor tamaño podrían proveer la estructura del bosque necesaria para un forrajeo mas efectivo, mientras que las carac...

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Section: Discussionmentioning

confidence: 99%

Nest-site selection by Common Black-Hawks in southwestern New Mexico

Sadoti¹

2008

J Field Ornithology

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Nest success of grassland sparrows on reclaimed surface mines

et al. 2011

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Grasslands resulting from surface mine reclamation support grassland songbird populations in several midwestern and eastern states in the United States, especially where reclaimed mines are large (>1,000 ha). However, most reclaimed surface mines in Pennsylvania are small (<200 ha), and nest success is unknown. We evaluated nest success of grasshopper (Ammodramus savannarum), Henslow's (A. henslowii), and Savannah sparrows (Passerculus sandwichensis) on 4 reclaimed surface mines (50–180 ha) in western Pennsylvania, USA from 2006 to 2007. Overall nest success based on mean covariate values was 0.435 (95% CI = 0.376–0.504) for grasshopper sparrows, 0.396 (95% CI = 0.295–0.533) for Henslow's sparrows, and 0.158 (95% CI = 0.063–0.392) for Savannah sparrows. These estimates of nest success are comparable to those on larger reclaimed mines and other habitats. Grasshopper and Henslow's sparrow nests that were well concealed were less likely to fail than highly visible nests (βvisible = −0.028, CI = −0.051 to −0.005 for grasshopper sparrows; βvisible = −0.063, CI = −0.112 to −0.014 for Henslow's sparrows), and nests in areas with surrounding deep litter were more likely to fail than nests in areas with shallow litter (βlitterD = −0.145, CI = −0.335 to 0.045 for grasshopper sparrows; βlitterD = −0.676, CI = −1.187 to −0.116 for Henslow's sparrows). Savannah sparrow nests in areas with high visual obstruction by vegetation were less likely to fail than nests in areas with sparse and short vegetation (βVisOb = 0.048, CI = 0.006–0.091). Daily probability of survival for grasshopper sparrow nests was greatest early and late in the breeding season, and Savannah sparrow nest survival followed a decreasing linear trend. Nest survival of Henslow's sparrows was greater on warm days (βtemp = 0.197, CI = 0.014–0.379), whereas for Savannah sparrows nest survival decreased on warm days and on days with rain, but for Savannah sparrows confidence intervals of weather effects included zero (βtemp = −0.098, CI = −0.246 to 0.050; βrain = 3.13, CI = −14.19 to 20.45). We suggest that small reclaimed surface mine grasslands can provide valuable nesting habitat and could be important to the conservation of grassland bird populations. Because nest success can increase in the latter part of the nesting season, agricultural disturbances or management activities in mid‐ to late summer could adversely affect reproductive success. © 2011 The Wildlife Society.

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Terrestrial Wildlife in the Post-mined Appalachian Landscape: Status and Opportunities

Lituma

Cox

Spear³

et al. 2020

Appalachia's Coal-Mined Landscapes

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Coal mining is an anthropogenic stressor that has impacted terrestrial and semi-aquatic wildlife in the Appalachian Plateau since European settlement. Creation of grassland and early-successional habitats resulting from mining in a forested landscape has resulted in novel, non-analog habitat conditions. Depending on the taxa, the extent of mining on the landscape, and reclamation practices, effects have ranged across a gradient of negative to positive. Forest-obligate species such as woodland salamanders and forest-interior birds or those that depend on aquatic systems in their life cycle have been most impacted. Others, such as grassland and early-successional bird species have responded favorably. Some bat species, as an unintended consequence, use legacy deep mines as winter hibernacula in a region with limited karst geology. Recolonization of impacted wildlife often depends on life strategies and species' vagility, but also on altered or arrested successional processes on the post-surface mine landscape. Many wildlife species will benefit from Forest Reclamation Approach practices going forward. In the future, managers will be faced with decisions about reforestation versus maintaining open habitats depending on the conservation need of species. Lastly, the post-mined landscape currently is the focal point for a regional effort to restore elk (Cervus canadensis) in the Appalachians.

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Nesting Success and Behavior of Northern Harriers on a Reclaimed Surface Mine Grassland in Kentucky

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 6 publications

References 9 publications

Nest-site selection by Common Black-Hawks in southwestern New Mexico

Nest-site selection by Common Black-Hawks in southwestern New Mexico

Nest success of grassland sparrows on reclaimed surface mines

Terrestrial Wildlife in the Post-mined Appalachian Landscape: Status and Opportunities

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