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27 results found
This study applied the Model of Acidification of Groundwater in Catchments (MAGIC) to estimate the sensitivity of 66 watersheds in the Southern Blue Ridge Province of the Southern Appalachian Mountains, United States, to changes in atmospheric sulfur (S) deposition. MAGIC predicted that stream acid…
Author(s): Timothy Sullivan, Bernard Cosby, William Jackson, Kai Snyder, Alan Herlihy
Keywords: Sulfur, Atmospheric deposition, Base cation, Acidification, Modeling
Source: Water Air Soil Pollut 219:11-26
Year: 2011
An important tool in the evaluation of acidification damage to aquatic and terrestrial ecosystems is the critical load (CL), which represents the steady-state level of acidic deposition below which ecological damage would not be expected to occur, according to current scientific understanding. A…
Author(s): Timothy Sullivan, Bernard Cosby, William Jackson
Keywords: Sulfur, Critical load, Target load, Acidification, Stream, Modeling
Source: Journal of Environmental Management 92:2953-2960
Year: 2011
This paper introduces a collaborative multi-agency effort to develop an Appalachian Trail (A.T.) MEGA-Transect Decision Support System (DSS) for monitoring, reporting and forecasting ecological conditions of the A.T. and the surrounding lands. The project is to improve decision-making on…
Author(s): Y. Wang, R. Nemani, F. Dieffenbach, K. Stolte, G. Holcomb
Keywords: Appalachian Trail, TOPS, Integration, Visualization, Modeling
Source: In: Proceedings of IEEE International Geoscience & Remote Sensing Symposium (IGARSS), 2010, pp. 1-4.
Year: 2010
Protection of area-limited species is an important component of plans to conserve biodiversity, but the habitat needs of such species can be different and important habitats may not align with existing reserves. We used empirically derived landscape suitability models for the spotted owl and the…
Author(s): William J. Zielinski, Carlos Carroll, Jeffrey R. Dunk
Keywords: Conservation planning, Landscape suitability, Fisher, Martes pennanti, Spotted owl, Strix occidentalis, Habitat suitability, Modeling
Source: Biological Conservation 133(4): 409-430
Year: 2006
Prescribed burning in chaparral, currently used to manage wildland fuels and reduce wildfire hazard, is often conducted under marginal burning conditions. The relative importance of the fuel and environmental variables that determine fire spread success in chaparral fuels is not quantitatively…
Author(s): X. Zhou, S. Mahalingam, D. Weise
Keywords: Marginal burning, Chaparral, Modeling, Fire spread
Source: Combustion and Flame 143(3): 183-198
Year: 2005
The Global Forest Products Model (GFPM) was applied to project the consequences for the global forest sector of doubling the rate of growth of bioenergy demand relative to a base scenario, other drivers being maintained constant. The results showed that this would lead to the convergence of the…
Author(s): Joseph Buongiorno, Ronald Raunikar, Shushuai Zhu
Keywords: Forest sector, Modeling, Bioenergy, Fuelwood, Wood products, Prices, Demand, Supply, Trade
Source: Journal of Forest Economics 17(2):214-229
Year: 2011
Watershed modeling has become an important tool for researchers. Modeling nitrate transport within drainage networks requires quantifying the denitrification within the sediments in canals and streams. In a previous study, several of the authors developed an equation using a term called a mass…
Author(s): T.W. Appelboom, G.M. Chescheir, F. Birgand, R.W. Skaggs, J.W. Gilliam, D. Amatya
Keywords: Denitrification, Mass transfer coefficient, Modeling, Q10 temperature coefficient, Temperature, Watershed
Source: American Society of Agricultural and Boiological Engineers, Vol. 53(2): 465-474.
Year: 2010
Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases participating in the regulation of global climate and environment. Predictive models on the emissions of N2O and NO emissions from soil into the atmosphere are required. We modified the CENTURY model (Soil Sci. Soc. Am…
Author(s): Shuguanga Liu, William A. Reiners, Michael Keller, Davis S. Schimel
Keywords: CENTURY, Nitrogen, Mineralization, Modeling, Rainfall, WFPS
Source: Environmental Modelling & Software 15 :727–743
Year: 2000
There are few studies that have examined the spatial variability of forest productivity over an entire tropical forested landscape. In this study, we used a spatially-explicit forest productivity model, TOPOPROD, which is based on the FORESTBGC model, to simulate spatial patterns of gross primary…
Author(s): Hongqing Wanga, Charles A.S. Halla, Frederick N. Scatenab, Ned Fetcherc, Wei Wua
Keywords: Modeling, Climate, Primary productivity, Spatial variability, Luquillo Mountains
Source: Forest Ecology and Management 179 :69–94l
Year: 2003
The highly pathogenic Phytophthora ramorum, causal organism of sudden oak death (SOD), is established in forests of the Pacific Northwest (USA) and is threatening invasion of other regions. Given the breadth of its host range, with dozens of asymptomatic ornamental hosts and with oaks, Quercus spp…
Author(s): H.L. Spaulding, L.K. Rieske
Keywords: Sudden oak death, Quercus, Invasive species, Forest vegetation simulator, Modeling
Source: Biol Invasions 13:1367–1375
Year: 2011