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40 results found
This study evaluates ion chromatography (IC) as an alternative to atomic absorption (AA) and inductively-coupled plasma spectromctry (ICP) for analysis of potassium (K), magnesium (Mg), and calcium (Ca), and and as an alternative to antimonylmolybdate colorimetry and ICP for analysis of phosphorus…
Author(s): Joseph B. Fischer, James H. Miller
Keywords: Ion chromatography, Soil, Forest, Analysis, Mehlich 1, K, Ca, Mg, P, Colorimetry, ICP, Atomic absorption, Macro-nutrients
Source: Communications in Soil Science and Plant Analysis, Vol. 35, Nos. 15 & 16, pp. 2191-2208, 2004
Year: 2004
Recent focus has been given to US forests as a sink for increases in atmospheric carbon dioxide. Current estimates of US Forest carbon sequestration average approximately 20 Tg (i.e. 1012 g) year. However, predictions of forest carbon sequestration often do not include the influence of hurricanes…
Author(s): Steven G. McNulty
Keywords: Carbon sequestration, Forest, Detritus
Source: Environmental Pollution 116 (2002) S17-S24
Year: 2002
A 3-year study to evaluate the effect of thinning on the hydrology of a drained loblolly pine (Pinus taeda L.) plantation was conducted in eastern North Carolina. The study utilized a paired watershed design with a 40-ha thinned watershed (WS5) and a 16-ha control watershed (WS2). Data from the…
Author(s): Johnny M. Grace, R. W. Skaggs
Keywords: Hydrology, Forest, Thinning, Water Management, Water Balance, Organic Soils
Source: Hydrology and Management of Forested Wetlands, Proceedings of the Internation Conference,8-12 April 2006. pp. 58-67
Year: 2006
Forest development following major disturbance is thought to follow a fairly repeatable temporal pattern. An initial cohort of trees establishes relatively rapidly (stand initiation), new establishment is precluded for an extended period (stem exclusion), and finally, new individuals again begin to…
Author(s): Brain J. Palik, Kurt S. Pregitzer
Keywords: Forest, repeatability, stem exclusion, bigtooth aspen, even-aged forest
Source: CAN. J. FOR. RES. Vol. 23 p. 1156-1168. (1993)
Year: 1993
This paper evaluates 17 years (1988-2004) of hydrologic and water quality data from a drained pine plantation in eastern North Carolina. The plantation age was 14 years at the beginning of the investigation (1988) and 30 years at the end of (2004). The 17-year average rainfall of 1538 mm was 11%…
Author(s): Devendra M. Amatya, R. W. Skaggs, J. W. Gilliam
Keywords: Water table, drainage outflows, Forest, Evapotranspiration, Nutrient concentrations, nutrient loadings
Source: In: Williams, Thomas, eds. Hydrology and Management of Forested Wetlands: Proceedings of the International Conference, St. Joseph, MI: American Society of Agricultural and Biological Engineers: 15-26
Year: 2006
Necromass is an important stock of carbon in tropical forests. We estimated volume, density, and mass of fallen and standing necromass in undisturbed and selectively logged forests at Juruena, Mato Grosso, Brazil (10.488S, 58.478W). We also measured standing dead trees at the Tapajos National…
Author(s): Michael Palace, Michael Keller, Gregory P. Asner, Jose Natalino M. Silva, Carlos Passos
Keywords: Amazon, Coarse woody debris, Necromass, Standing dead, Reduced impact logging, Tropical, Forest, Wood density
Source: Forest Ecology and Management 238 309–318
Year: 2007
Whether the goal is to fill gaps in the flux record, or to extract physiological parameters from eddy covariance data, researchers are frequently interested in fitting simple models of ecosystem physiology to measured data. Presently, there is no consensus on the best models to use, or the ideal…
Author(s): Andrew D. Richardson, David Y. Hollinger, David Y. Hollinger
Keywords: AmeriFlux, Carbon flux, Eddy covariance, Flux uncertainty, Forest, Howland, Models, Maximum likelihood, Measurement error, Respiration
Source: Agricultural and Forest Meteorology. 131: 191-208.
Year: 2005
Residential development at the rural fringe, although contributing to many environmental problems, is steadily attracting new homeowners. Among the appeals of living "out in the country" are being closer to "nature" and having "space." The purpose of this study is to examine what these concepts…
Author(s): Rachel Kaplan, Maureen E. Austin
Keywords: Natural environment, Sprawl, Land use planning, Perception, Environmental preference, Forest
Source: Landscape and Urban Planning 69(2004): 235-243
Year: 2004
Past studies of forest disturbance traditionally have focused on biomass loss, e.g., blowdown in the Boundary Waters Canoe Area Wilderness, gypsy moth infestation, the impacts of Hurricanes Hugo and Katrina. Using FIA data and satellite imagery, this study examined a region of the country that is…
Author(s): W. Keith Moser, Mark D. Nelson, Mark H. Hansen, Sean Healey, Warren Cohen
Keywords: Forest, inventory, FIA, remote sensing, eastern redcedar, agricultural abandonment, Landsat
Source: In: McWilliams, Will; Moisen, Gretchen; Czaplewski, Ray, comps. Forest Inventory and Analysis (FIA) Symposium 2008; October 21-23, 2008; Park City, UT. Proc. RMRS-P-56CD. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 16 p.
Year: 2009
We investigated whether fish assemblage structure in southern Appalachian streams differed with historical and contemporary forest cover. We compared fish assemblages in 2nd?4th order streams draining watersheds that had increased forest cover between 1950 and 1993 (i.e., reforesting watersheds).
Author(s): Chris L. Burcher, Matthew E. McTammany, E. Fred Benfield, Gene S. Helfman
Keywords: Land-use, Agriculture, Forest, Riparian zone, Stream, Threshold
Source: Environmental Management (2008) 41:336?346
Year: 2008