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48 results found
We used aerial photographs from 1939, 1974, and 1990 to examine how land cover has changed on the 5,286-ha Charles C. Deam Wilderness of Hoosier National Forest over this time span. Digital elevation models were used to examine changes in land-cover class (closed-canopy forest, open forest,…
Author(s): MIchael A. Jenkins, George R. Parker
Keywords: forest fragmentation, GSI, land use, ecosystem recovery, spatial analysis
Source: Natural Areas Journal. Volume 20. Issue 1. 2000. pp. 46-55
Year: 2000
The U.S. Forest Service, the U.S. Geological Survey, and the National Park Service formed the Collaborative Environmental Monitoring and Research Initiative (CEMRI) to test strategies for integrated environmental monitoring among the agencies. The initiative combined monitoring and research efforts…
Author(s): Peter S. Murdoch, Jennifer C. Jenkins, Richard A. Birdsey
Keywords: environmental monitoring, forest fragmentation, carbon sequestration, nitrogen saturation, calcium depletio
Source: Gen. Tech. Rep. NRS-25. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. Executive summary, 15 p.; online foundation document, 93 p.
Year: 2008
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…
Author(s): Scott K. Robinson, Frank R. Thompson III, Therese M. Donovan, Donald R. Whitehead, John Faaborg
Keywords: Migratory birds, forest fragmentation, cowbirds, habitat fragmentation
Source: Science. Vol. 267 no. 5206.:p. 1987-1990.
Year: 1995
To integrate multiple uses (mature forest and commodity production) better on forested lands, timber management strategies that cluster harvests have been proposed. One such approach clusters harvest activity in space and time, and rotates timber production zones across the landscape with a long…
Author(s): Eric J. Gustafson
Keywords: timber harvest, aggregation of harvests, dynamic zoning, spatial simulation model, forest interior, forest fragmentation, forest management policy, forest management planning
Source: Ecosystems. Vol. 1 no. 1.:p. 482-492. (1998)
Year: 1998
Raccoons (Procyon lotor), opossums (Didelphis virginiana), and striped skunks (Mephitis mephitis) are predators of forest songbird eggs and nestlings. We examined the relative abundance of these predators at landscape and local scales to better understand predation risks. At the landscape scale, we…
Author(s): William D. Dijak, Frank R. Thompson III
Keywords: edge effects, forest fragmentation, landscape, Missouri, opossum, raccoon, striped skunk
Source: Journal Of Wildlife Management. Vol. 64 no. 1.:p. 209-216. (2000)
Year: 2000
We examined the relationship between bat species activity and composition and the extent of forest cover and urbanization in and adjacent to 11 U.S. National Park Service, National Capital Region Parks in Maryland, Virginia, West Virginia, and Washington, D.C., from 2003-2004, using mist nets, harp…
Author(s): Joshua B. Johnson, J. Edward Gates, W. Mark Ford
Keywords: bats, forest fragmentation, landscape, national capital region, urbanization
Source: Urban Ecosystems. 11: 227-242.
Year: 2008
Changes in land use patterns in and around forests, including rural development and road building, have occurred throughout the United States and are accelerating in many areas. As a result, there have been significant departures from 'natural' or pre-settlement disturbance regimes. Altered…
Author(s): Robert M. Scheller, Steve Van Tuyl, Kenneth Clark, Nicholas G. Hayden, John Hom, David J. Mladenoff
Keywords: forest simulation model, fire management, forest fragmentation, wildland?urban interface, New Jersey Pine Barrens, prescribed burning, natural range of variability
Source: Forest Ecology and Management. 255: 1489-1500.
Year: 2008
Urbanization, and the resulting fragmentation of forest land, are of great concern across the world and continues to affect many facets of natural ecosystems. Due to development pressure, this is especially true in the northeastern United States. Assessments of regional and national forest…
Author(s): Randall S. Morin, Andrew Lister, James Doyle
Keywords: forest fragmentation, urbanization, forest inventory, forest health, land cover, forest composition, forest structure
Source: In: Proceedings, 2009 Society of American Foresters national convention, Opportunities in a forested world; 2009 Sept. 30- Oct. 4; Orlando, FL. Bethesda MD: Society of American Foresters. [CD].
Year: 2009
The reproductive success, growth, and mortality rates of tree species in the northern United States will be differentially affected by projected climate change over the next century. As a consequence, the spatial distributions of tree species will expand or contract at differential rates. In…
Author(s): Robert M. Scheller, David J. Mladenoff
Keywords: climate change, forest fragmentation, interspecific competition, carbon storage, LANDIS-II, tree species range expansion, tree species migration
Source: Climate Research. 36: 191-202.
Year: 2008
Forest health analysts seek to define the location, extent, and magnitude of changes in forest ecosystems, to explain the observed changes when possible, and to draw attention to the unexplained changes for further investigation. The data come from a variety of sources including satellite images,…
Author(s): John W. Coulston, Kurt H. Riitters
Keywords: Monitoring, spatial analysis, spatial clusters, forest fragmentation, forest insect, forest disease, hotspots
Source: Environmental Management 31(6): 764-773
Year: 2003