Parent Layer: Environmental Reference Data

Name: NWFP Northern Spotted Owl Dispersal 20 Yr.

Display Field: Value_Class

Type: Feature Layer

Geometry Type: esriGeometryPolygon

Description: This raster map was developed using a method described in Davis et al. (2011, pgs. 40 and 41). This method evaluated dispersal habitat at the NWFP-scale using a spatial extent derived from Forsman et al. (2002). A 15.5-mi radius roving circular analysis window was used to quantify the percentage of dispersal cover type across all land ownerships for the year 2012. The "value" attribute in this raster represents the percentage dispersal cover type within that area. The class attribute for "dispersal capable" landscape was based on a threshold of ≥40 percent dispersal cover type within this circle. The analysis in Davis et al. (2011) showed that this threshold ccontained 90 percent of documented NSO movements from Forsman et al. (2002). See Davis et al. (2016) for more details.References:Davis, R.J.; Dugger, K.M.; Mohoric, S.; Evers, L.; Aney, W.C. 2011. Northwest Forest Plan—the first 15 years (1994–2008): status and trends of northern spotted owl populations and habitats. Gen. Tech. Rep. PNW-GTR-850. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 147 p.Forsman, E.D.; Anthony, R.G.; Reid, J.A.; Loschl, P.J.; Sovern, S.G.; Taylor, M.; Biswell, B.L.; Ellingson, A.; Meslow, E.C.; Miller, G.S.; Swindle, K.A.; Thrailkill, J.A.; Wagner, F.F.; Seaman, D.E. 2002. Natal and breeding dispersal of northern spotted owls. Wildlife Monographs No. 149. Washington, DC: The Wildlife Society. 35 p.

Copyright Text: Davis, Raymond J.; Hollen, Bruce; Hobson, Jeremy; Gower, Julia E.; Keenum, David. 2016. Northwest Forest Plan—the first 20 years (1994–2013): status and trends of northern spotted owl habitats. Gen. Tech. Rep. PNW-GTR-929. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 54 p.

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Extent:

XMin: 7123331.20483014
YMin: -652495.218175441
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Drawing Info:

Renderer:
Unique Value Renderer:
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UniqueValueInfos:
• Value: 0-20% Not dispersal capable
  Label: 0-20% Not dispersal capable
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• Value: 20.1-40% Not dispersal capable
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• Value: 40.1-60% Dispersal capable
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• Value: 60.1-80% Dispersal capable
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• Value: 80.1-100% Dispersal capable
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