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79 results found
Ozone is an important forest stressor that has been measured at known phytotoxic levels at forest locations across the United States. The percent forest exhibiting negative impacts from ozone air pollution is one of the Montreal Process indicators of forest health and vitality. The ozone…
Author(s): Gretchen C, Smith, William D. Smith, John W. Coulston
Keywords: air quality, bioindicator species, biomonitoring, forest health, kriging, ozone, ozone sensitive, risk assessment, spatial interpolation
Source: Gen. Tech. Rep. NRS-20. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 34 p.
Year: 2007
A GIS model predicting the spatial distribution of terrestrial salamander abundance based on topography and forest age was developed using parameters derived from the literature. The model was tested by sampling salamander abundance across the full range of site conditions used in the model. A…
Author(s): Eric J. Gustafson, Nathan L. Murphy, Thomas R. Crow
Keywords: Spatial models, GIS, forest management, risk assessment, terrestrial salamanders, timber
Source: Journal of Environmental Management (2001) 63, 281?292
Year: 2001
In 1994, the Forest Inventory and Analysis (FIA) and Forest Health Monitoring programs of the U.S. Forest Service implemented a national ozone (O3) biomonitoring program designed to address specific questions about the area and percent of forest land subject to levels of O3 pollution that may…
Author(s): Gretchen C. Smith, John W. Coulston, Barbara M. O'Connell
Keywords: air quality, bioindicator species, biomonitoring, forest health, ozone, ozone sensitive, risk assessment, spatial interpolation
Source: Gen. Tech. Rep. NRS-34. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station. 100 p.
Year: 2008
Provides a database of selected literature pertaining to the prevention, early detection and rapid response, control and management, and rehabilitation and restoration related to three invasive fungal pathogens of forest trees. Literature addressing regulatory policy and management practices for…
Author(s): T.M. Seeland, M.E. Ostry, R. Venette, J. Juzwik
Keywords: butternut canker, oak decline, alder mortality, exotic pathogens, risk assessment, forest management
Source: Gen. Tech. Rep. NC-270. St. Paul, MN: U.S. Department of Agriculture, Forest Service, North Central Research Station. 17 p.
Year: 2006
Urbanization replaced the extant natural resource base (e.g., forests, wetlands) with an infrastructure that is capable of supporting humans. One ecological consequence of ubranization is higher concentraations of nitrogen (N) and phosphorous (P) in continuing urbanization will chance the relative…
Author(s): James D. Wickham, Robert V. Oneil, Kurt H. Riitters, Elizabeth R. Smith, Timothy G. Wade, K. Bruce Jones
Keywords: Export of N and P, vulnerability to, geographic modeling, GIS. land-cover change, land cover, forest of agriculture, landscape character affects pullution vulnerability, mid-Atlantic states (USA), modeling, empirical and risk based, nitrogen, phosphorus, regional-scale analysis, risk assessment, urbanization, existing and predicted
Source: Ecological Applications, September, 223-236
Year: 2001
Phytophthora ramorum has caused extensive mortality to tanoak and several oak species in coastal California. This pathogen has infected at least 72 plant species under natural conditions and 32 additional species in the laboratory. Many infected hosts have been distributed across the United States…
Author(s): Robert C. Venette, Susan D. Cohen
Keywords: sudden oak death, risk assessment, CLIMEX, climate models, exotic invasive pathogens
Source: Forest Ecology and Management. 231: 18-26.
Year: 2006
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
Tropospheric ozone occurs at phytotoxic levels in the northeastern and mid-Atlantic regions of the United States. Quantifying possible regional-scale impacts of ambient ozone on forest tree species is difficult and is confounded by other factors, such as moisture and light, which influence the…
Author(s): John W. Coulston, Gretchen C. Smith, William D. Smith
Keywords: air pollution, monitoring, northeastern United States, risk assessment, spatial analysis
Source: Environmental Monitoring and Assessment 83:113-127, 2003.
Year: 2003
Abstract Because human land uses tend to expand over time, forests that share a high proportion of their borders with anthropogenic uses are at higher risk of further degradation than forests that share a high proportion of their borders with non-forest, natural land cover (e.g., wetland). Using 1-…
Author(s): Timothy G. Wade, Kurt H. Riitters, James D. Wickham, K. Bruce Jones
Keywords: forest fragmentation, forest pattern, global, risk assessment, targeting
Source: Conservation Ecology 7(2): 7. [online] URL: <a href=></a>
Year: 2003
The 1st Fire Behavior and Fuels Conference: Fuels Management -- How to Measure Success was held in Portland, Oregon, March 28-30, 2006. The International Association of Wildland Fire (IAWF) initiated a conference on this timely topic primarily in response to the needs of the U.S. National…
Author(s): Patricia L. Andrews
Keywords: fuels management, fire behavior, modeling, risk assessment, fuel characterization, mapping, fuel treatment, prescribed fire, fire ecology, fire effects, economics, biomass utilization, fire weather
Source: In: Andrews, Patricia L.; Butler, Bret W., comps. 2006. Fuels Management-How to Measure Success: Conference Proceedings. 28-30 March 2006; Portland, OR. Proceedings RMRS-P-41. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 1-2.
Year: 2006