Nesting Habitat of Coexisting Accipiter in Oregon

Reynolds, Richard T.; Meslow, E. Charles; Wight, Howard M.

doi:10.2307/3808415

Cited by 93 publications

(84 citation statements)

References 12 publications

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“…The importance of a cool microsite (north exposure and near water) seems important mainly in more southern latitudes of the species' range. Variation in nesting habitat is evident when comparing nest sites used in Nevada, which are in parklike aspen with little understory and high canopy closure (Younk and Bechard 1994), to nest sites in Oregon, which are in stands with the complex structure of old-growth forest (Reynolds et al 1982). Some evidence suggests that reoccupancy of nest stands is related to nest stand size.…”

Section: Systematics-inmentioning

confidence: 99%

“…Many authors who have studied goshawks in the Western United States have suggested that extensive timber harvesting may result in reductions in goshawk abundance (e.g., Hennessy 1978, Reynolds et al 1982, Moore and Henny 1983, Hall 1984, Bloom et al 1986, Woodbridge 1988, Crocker-Bedford 1990, Patla 1990. Two studies document reduced nest reoccupancy after timber harvesting (CrockerBedford 1990, Patla 1990).…”

Section: Systematics-inmentioning

confidence: 99%

“…Habitat use-Throughout North America, goshawks typically nest in various forest types generally associated with mature or old-growth coniferous or deciduous forest structures having relatively dense canopies (Shuster 1980;Jones 1981;Reynolds et al 1982;Moore and Henny 1983;Erickson 1987;Speiser and Bosakowski 1987;Kennedy 1988;Crocker-Bedford and Chaney 1988;Hayward and Escano 1989;Reynolds 1983Reynolds , 1989Marshall 1992). Most studies of habitat use concentrate on forest structure at the nest tree and in the immediate vicinity.…”

Section: Systematics-inmentioning

confidence: 99%

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Conservation assessment for the northern goshawk in southeast Alaska.

Iverson¹,

Hayward²,

Titus³

et al. 1996

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The conservation status of northern goshawks in southeast Alaska is examined through developing an understanding of goshawk ecology in relation to past, present, and potential future habitat conditions in the region under the current Tongass land management plan. Forest ecosystem dynamics are described, and a history of forest and goshawk management in the Tongass National Forest is reviewed. Nearly 900,000 acres of the most productive old-growth temperate rain forest in southeast Alaska (public and private lands) have been harvested during the past 90 years and changed to early seral conifer forests. Goshawk habitat relations are described through a review of the goshawk literature. Significant preliminary findings of a habitat relation study in southeast Alaska include the following: goshawks select productive old-growth forests with > 60 percent of all adult goshawk telemetry relocations occurring in this cover type; nonforest, clearcut, and alpine cover types were least used and were avoided relative to their availability; and the median breeding season minimum convex polygon use areas of adult goshawks was about 10,000 acres. Goshawks predominantly use gentle slopes (70 percent of relocations) at elevations below 800 feet (54-74 percent of relocations); 24 percent of relocations occurred in riparian habitat zones, and nearly 20 percent of all relocations occurred within the beach fringe habitat extending 1,000 feet inland from the ocean shoreline. Goshawk nesting habitat is a nonrandom subset of the landscape with a significantly higher proportion of productive old-growth forest within a 600-acre analysis area surrounding known nests. The probability of persistence of goshawks has declined over the past 50 years owing to habitat loss and likely will continue to decline under current management plan regimes; however, the goshawk population likely is not in immediate peril. The predicted consequences of several alternative habitat management approaches are compared. This analysis suggests that long rotation forestry (e.g., 300 years) and uneven-aged silvicultural management may maintain habitat characteristics important to sustaining goshawk populations well distributed across the region. Although habitat reserves are not considered an essential component of a forest-wide goshawk conservation strategy, reserves, in combination with extended rotations, may be important where the intensity of past management actions has precluded the opportunity to attain a desired combination of forest age classes achieveable under long rotations. Revision efforts for the TLMP resumed in fall 1994 with a focus on five major land management issues considered to be inadequately addressed in the existing TLMP: wildlife viability, fish and riparian habitat, caves and karst, alternatives to clearcutting, and socioeconomic considerations. Goshawk conservation is an important component within the wildlife viability issue.Concern for goshawk population viability in southeast Alaska evolved during the past decade and culminated with th...

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Section: Systematics-inmentioning

confidence: 99%

Section: Systematics-inmentioning

confidence: 99%

Section: Systematics-inmentioning

confidence: 99%

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Conservation assessment for the northern goshawk in southeast Alaska.

Iverson¹,

Hayward²,

Titus³

et al. 1996

View full text Add to dashboard Cite

show abstract

“…While generalists at large spatial scales, goshawks consistently nest in mature trees set amid groups of codominant, close-canopy neighbors (Reynolds et al 1982, Squires and Reynolds 1997, DeStefano 1998. This nest grove is situated within a larger (10-100ha) homogenous forest stand typified by deep, closed canopies and little shrub cover (Reynolds et al 1992, Finn et al 2002b.…”

Section: Biology Of Predatorsmentioning

confidence: 99%

Forest Structure Within Barred Owl (Strix varia) Home Ranges in the Eastern Cascade Range, Washington

Singleton

2015

Journal of Raptor Research

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“…Nest areas usually contain relatively high tree canopy cover and a high density of large trees (Bartelt 1977;Crocker-Bedford and Chaney 1988;Daw and others 1998;Hall 1984;Hayward and Escano 1989;Kennedy 1988Kennedy , 2003McGowan 1975;Moore and Henny 1983;Reynolds 1982;Reynolds and others 1982;Saunders 1982;Speiser and Bosakowski 1987). Although goshawks are considered habitat generalists at large spatial scales and use a wide variety of forest types, they tend to nest in a relatively narrow range of forest structural conditions (Erickson 1987;Hargis and others 1994;Palmer 1988;Reynolds and others 1982;Saunders 1982;Squires and Reynolds 1997;Squires and Ruggiero 1996).…”

Section: Nest Areasmentioning

confidence: 99%

Northern goshawk and its prey in the Black Hills: Habitat assessment

Graham¹,

Volo²,

Reynolds³

2015

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The northern goshawk is classified as a Sensitive Species in all USDA Forest Service regions, including on the Black Hills National Forest in western South Dakota and northeastern Wyoming. An assessment was conducted of the quality of northern goshawk nesting and foraging habitat, along with the habitat quality of 22 of the goshawk's prey species. A Delphi (expert panel) evaluation of goshawk and prey habitat in 3,414 watersheds averaging 449 acres (182 ha) in size was completed by wildlife biologists from the Black Hills National Forest. The quality of goshawk nesting and foraging habitat and of prey group habitats was reported individually, then combined for each watershed. The optimum goshawk and prey habitat, totaling 67 watersheds or 34,427 acres (13,932 ha), was distributed throughout the nearly 1.5 million-acre (about 607,000-ha) Black Hills National Forest. Panel members found that the Bear Lodge Mountains, located in northeastern Wyoming, proportionally had the most optimum, high-, and medium-rated habitat. Wildfire, bark beetles, urban encroachment, and timber harvest can negatively affect northern goshawks and their prey's habitat. However, increasing the amount and presence of quaking aspen forests within the Black Hills will most likely improve the habitat of the goshawk by improving the habitat for many of its prey. Using previously articulated conditions as a template in the Forest Vegetation Simulator, we designed an example 100-year silvicultural system to create and maintain forest conditions for the northern goshawk and its prey on the Black Hills Experimental Forest.Keywords: northern goshawk, Accipiter gentilis atricapillus, silviculture, forest structure, bark beetles, ponderosa pine, forest management. AuthorsRussell T. Graham is a research forester (silviculturist) with the U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, in Moscow, Idaho. His research activities include the role that coarse woody debris plays in forests, large-scale ecosystem assessment and planning, describing northern goshawk habitat, and developing forest management strategies (silvicultural systems) for a wide array of management objectives. Shelley Bayard deVolo is an environmental coordination specialist for the Larimer County Engineering Department in Fort Collins, Colorado. She studied wildlife for several decades in California, Arizona, Colorado, and South Dakota. During her 15-year tenure with the Rocky Mountain Research Station in Fort Collins, Colorado, she assisted in studying demographic and habitat relationships for northern goshawks on the Kaibab Plateau, Arizona. She also determined genetic diversity for Kaibab goshawks and investigated genetic relationships for goshawk populations across North America.Richard T. Reynolds is a research wildlife biologist with the Rocky Mountain Research Station in Fort Collins, Colorado. He has investigated the relationship between the composition and structure of habitats as well as the demographic performance of apex avian predat...

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Nesting Habitat of Coexisting Accipiter in Oregon

Cited by 93 publications

References 12 publications

Conservation assessment for the northern goshawk in southeast Alaska.

Conservation assessment for the northern goshawk in southeast Alaska.

Forest Structure Within Barred Owl (Strix varia) Home Ranges in the Eastern Cascade Range, Washington

Northern goshawk and its prey in the Black Hills: Habitat assessment

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