Search Results - "Gregoire, T.G"

Estimating biomass and carbon for Gilbertiodendron dewevrei (De Wild) Leonard, a dominant canopy tree of African tropical Rainforest: Implications for policies on carbon sequestration by Umunay, P.M., Gregoire, T.G., Ashton, M.S.

“…•Antithetic and randomized branch are unbiased and cost effective sampling techniques.•Model using basal area and 3-knot cubic spline provides good prediction…”
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Lidar sampling — Using an airborne profiler to estimate forest biomass in Hedmark County, Norway by Nelson, R., Gobakken, T., Næsset, E., Gregoire, T.G., Ståhl, G., Holm, S., Flewelling, J.

“…An airborne profiling lidar was used to estimate total aboveground dry biomass, a surrogate for aboveground carbon stocks, for all land cover types in Hedmark…”
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Habitat characterizations underestimate the role of edaphic factors controlling the distribution of Entandrophragma by Hall, J.S, McKenna, J.J, Ashton, P.M.S, Gregoire, T.G

“…Numerous theories have been developed and tested to explain the high botanical diversity in tropical forests, ranging from nonequilibrium theories emphasizing…”
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Multivariate analyses of visible/near infrared (VIS/NIR) absorbance spectra reveal underlying spectral differences among dried, ground conifer needle samples from different growth environments by Richardson, A.D, Reeves, J.B. III, Gregoire, T.G

“…• Absorbance of visible and near infrared (400-2500 nm) radiation by plant material is determined primarily by biochemical and structural components. We used…”
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tree crown distribution of hemlock woolly adelgid, Adelges tsugae (Hem., Adelgidae) from randomized branch sampling by Evans, A.M, Gregoire, T.G

“…An exotic insect, the hemlock woolly adelgid, Adelges tsugae Annand (Hem., Adelgidae), is spreading through eastern North America, killing hemlock trees [Tsuga…”
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Separating the ground and airborne laser sampling phases to estimate tropical forest basal area, volume, and biomass by Nelson, Ross, Oderwald, Richard, Gregoire, Timothy G.

“…Airborne laser profiling data were used to estimate the basal area, volume, and biomass of primary tropical forests. A procedure was developed and tested to…”
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Sampling methods to estimate foliage and other characteristics of individual trees by Gregoire, Timothy G., Valentine, Harry T., Furnival, George M.

“…The total foliar area or mass of a tree is difficult to measure, as is its bark or cambial area, and various other components of aboveground biomass. A variety…”
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Nonlinear mixed-effects modeling of cumulative bole volume with spatially correlated within-tree data by Gregoire, T.G, Schabenberger, O

“…Equations to predict the volume of an individual tree bole between stump height and the height at which its diameter has tapered to a specified minimum are…”
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Edge effects in line intersect sampling with segmented transects by Affleck, D.L.R, Gregoire, T.G, Valentine, H.T

“…Transects consisting of multiple, connected segments with a prescribed configuration are commonly used in ecological applications of line intersect sampling…”
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Using simultaneous regression techniques with individual-tree growth models by Hasenauer, H. (Universitat fur Bodenkulture, Vienna, Austria.), Monserud, R.A, Gregoire, T.G

“…Individual-tree growth models basically consist of a number of equations (e.g., diameter or basal area increment model, height increment model, crown ratio…”
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The effects of fixed-area plots width on forest canopy height simulation by Nelson, R.F. (NASA/Goddard Space Flight Center, Greenbelt, MD.), Gregoire, T.G, Oderwald, R.G

“…Mapped-stand data which includes tree location and mensuration data may be used to simulate the height characteristics of a forest canopy in a computer. The…”
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Sampling methods to estimate stem length and surface area of tropical tree species by Gregoire, Timothy G., Valentine, Harry T.

“…Sampling strategies to provide unbiased estimates of individual tree characteristics have received increased attention in the past decade. Sampling-based…”
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Variance derivations and related aspects of growth component estimators with successive variable-radius-plot samples by Gregoire, Timothy G.

“…By recognizing the mutually exclusive subsets of trees constituting a forest population over some interval of time, the relationship of an estimator of growth…”
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Growth of hybrid fir trees in Connecticut by MERGEN, F, GREGOIRE, T. G

“…Crosses were made between various species of fir in the spring of 1960 and 1962. Progeny of successful crosses were sown in Connecticut in 1962 and measured…”
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