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128 results found
The distribution and abundance of many plants and animals are influenced by the spatial arrangement of suitable habitats across landscapes. We derived habitat maps from a digital land cover map of the ~178,000 km2 Chesapeake Bay Watershed by using a spatial filtering algorithm. The regional amounts…
Author(s): Kurt H. Riitters, R.V. O'Neill, K.B. Jones
Keywords: landscape ecology, wildlife habitat, spatial statistics, risk assessment, scale
Source: Biological Conservation 81(1997) 191-202
Year: 1997
Prescribed fire is used routinely in the southern United States to reduce fuel loading and decrease the risk of catastrophic wildfires, improve forest health, and manage threatened and endangered species. With rapid human population growth, southern forests have become fragmented by an extensive…
Author(s): John A. Stanturf, Robert Rummer, M. Wimberly, Timothy G. Rials, Philip. A. Araman, Rodney Busby, James Granskog, Leslie Groom
Keywords: vegetation management, engineering systems, landscape ecology, prescribed fire
Source: Proceedings, 2nd Forest Engineering Conference. 135-138
Year: 2003
We studied prey populations and the use and composition of home ranges of 47 Northern Spotted Owls (Strix occidentalis caurina) over 12 mo in five landscapes in two forest types in southwestern Oregon. We measured 1-yr home ranges of 23 owl pairs, 2-yr home ranges of 13 pairs, and 3-yr…
Author(s): A.B. Carey, S.P. Horton, B.L. Biswell
Keywords: bushy-tailed woodrat, dusky footed woodrat, foraging behavior, Great Horned Owl, habitat selection, home range, landscape ecology, northern flying squirrel, Oregon, Spotted Owl, telemetry, Washington
Source: Ecological Monographs. 62(2): 223-250
Year: 1992
This document provides land managers with practical suggestions for implementing ecosystem management. It contains 28 papers organized into five sections: historical perspectives, ecological principles, sampling design, case studies, and implementation strategies.
Author(s): M.E. Jensen, P.S. Bourgeron
Keywords: Ecosystem management, landscape ecology, conservation biology, land use planning
Source: Gen. Tech. Rep. PNW-GTR-318. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 376 p. (Everett, Richard L., assessment team leader; Eastside forest ecosystem health assessment)
Year: 1994
Thirty-six papers related to the theme of wilderness as a place to conduct science are included. Five overview papers synthesize knowledge and research about basic work in the biophysical and social sciences that has been conducted in wilderness. Other papers present the results of focused basic…
Author(s): Stephen F. McCool, David N. Cole, William T. Borrie, Jennifer O'Loughlin
Keywords: landscape ecology, paleoecology, populations, therapeutic experiences, visitor experiences, wilderness benefits, wildlife
Source: Proceedings RMRS-P-15-VOL-3. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 275 p.
Year: 2000
This document presents two spatial scales of a hierarchical, ecoregional framework and provides a connection to both larger and smaller scale ecological classifications. The two spatial scales are subregions (1:250,000) and landscape-level ecoregions (1:100,000), or Level IV and Level V ecoregions…
Author(s): Sharon E. Clarke, Sandra A. Bryce
Keywords: Ecoregions, anadromous fish habitat, fish habitat, watershed classification, landscape ecology, water quality, environmental mapping, classification
Source: Gen. Tech. Rep. PNW-GTR-395. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 114 p
Year: 1997
This atlas documents the current and possible future distribution of 80 common tree species in the Eastern United States and gives detailed information on environmental characteristics defining these distributions. Also included are outlines of life history characteristics and summary statistics…
Author(s): Louis R. Iverson, Anantha M. Prasad, Betsy J. Hale, Elaine Kennedy Sutherland
Keywords: Eastern United States, global change, geographic information systems, forest inventory and analysis, trees, landscape ecology, species distribution
Source: Gen. Tech. Rep. NE-265. Radnor, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station. 245 p.
Year: 1999
This document synthesizes research accomplishments initiated and funded under the Northwest Forest Plan or the President’s Forest Plan (hereafter referred to as the Forest Plan) since its inception in 1994. Three major parts in this document cover, the context for this effort, eight Forest Plan…
Author(s): Richard W. Haynes, Gloria E. Perez, [tech. eds.].
Keywords: Northwest Forest Plan, ecosystem management, conservation, land management, alternative silviculture, landscape ecology, adaptive management
Source: Gen. Tech. Rep. PNW-GTR-498. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 130 p
Year: 2000
UTOOLS is a collection of programs designed to integrate various spatial data in a way that allows versatile spatial analysis and visualization. The programs were designed for watershed-scale assessments in which a wide array of resource data must be integrated, analyzed, and interpreted. UTOOLS…
Author(s): Alan A. Ager, Robert J. McGaughey
Keywords: Geographic information system, wildlife habitat relations, landscape visualization, landscape ecology, ecosystem management, ecosystem planning, watershed analysis, habitat analysis, spatial analysis, spatial databases, visualization software
Source: Gen. Tech. Rep. PNW-GTR-397. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 15 p
Year: 1997
We compared 45 photographs taken before 1925 to photographs taken as late as 1999 and documented landscape changes above 5,000 feet elevation in the Wallowa, Elkhorn, and Greenhorn Mountains of northeastern Oregon. We noted the following major changes from these comparisons: (1) the expansion of…
Author(s): Jon M. Skovlin, Gerald S. Strickler, Jesse L. Peterson, Arthur W. Sampson
Keywords: Wallowas, Elkhorns, Greenhorns, Oregon, photography (repeat), photo history, land use, long-term change, landscape ecology, tree encroachment, whitebark pine, recreation, Eagle Cap Wilderness Area, erosion, fire frequency, climate, subalpine ecosystem
Source: Gen. Tech. Rep. PNW-GTR-505. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 78 p
Year: 2001