Calibration of the forest vegetation simulator (FVS) model for the main forest species of Ontario, Canada

2006 ◽  
Vol 199 (3) ◽  
pp. 336-349 ◽  
Author(s):  
V. Lacerte ◽  
G.R. Larocque ◽  
M. Woods ◽  
W.J. Parton ◽  
M. Penner
Keyword(s):  
Forest Vegetation ◽  
Forest Species ◽  
Forest Vegetation Simulator

scholarly journals Differences in Extrinsic Tree Quality and Value of Fibre Production Following Alternative Vegetation Management Treatments in Northwestern Ontario

2011 ◽  
Vol 87 (02) ◽  
pp. 251-259 ◽  
Author(s):  
Krish Homagain ◽  
Chander Shahi ◽  
Mathew Leitch ◽  
Nancy Luckai ◽  
F. Wayne Bell
Keyword(s):  
White Spruce ◽  
Fibre Production ◽  
Vegetation Management ◽  
Forest Vegetation ◽  
Forest Vegetation Simulator ◽  
Product Mix ◽  
Northwestern Ontario ◽  
Stem Quality ◽  
Tree Quality

We examined differences in stem quality, and volume and value of fibre produced by planted white spruce 16 years after vegetation management treatments in northwestern Ontario. Forest Vegetation Simulator (FVSOntario) was used to project the total and merchantable volume to age 70 and BUCK-2 was used to optimize the resulting product mix. Projected value was based on 2009 prices for hog fuel, pulpwood and SPF (spruce–pine–fir) eastern green lumber prices. At 16 years posttreatment, gross total volumes in herbicide-treated and mechanically cut plots were significantly higher (120%–165% and 94%–98%, respectively) than that in control plots (14.73 m3 ha-1). Based on height, diameter, and taper criteria, observed tree quality did not differ among treatments. The projected value of the fibre produced was 36% to 53% higher in herbicide- treated plots and 24% to 37% higher in mechanically cut plots than in control plots ($18 486.76 per ha).

Testing the Lake States variant of FVS (Forest Vegetation Simulator) for the main forest types of northern Ontario

2004 ◽  
Vol 80 (4) ◽  
pp. 495-506 ◽  
Author(s):  
V. Lacerte ◽  
G R Larocque ◽  
M. Woods ◽  
W J Parton ◽  
M. Penner
Keyword(s):  
Black Spruce ◽  
Basal Area ◽  
Stand Density ◽  
Site Index ◽  
Forest Vegetation ◽  
Forest Vegetation Simulator ◽  
Consistency Analysis ◽  
Northern Ontario ◽  
Individual Tree ◽  
Stand Basal Area

The Lake States variant of the FVS (Forest Vegetation Simulator) model (LS-FVS), also known as the LS-TWIGS variant of FVS, was validated for black spruce (Picea mariana (Mill.) BSP), white spruce (Picea glauca (Moench) Voss), jack pine (Pinus banksiana Lamb.) and trembling aspen (Populus tremuloides Michx.) forests in northern Ontario. Individual-tree data from 537 remeasured sample plots were used. This dataset included different combinations of site index, stand density and age. It was possible to compare observations and predictions for different projection length periods. The validation exercise included a biological consistency analysis, the computation of mean percent difference (MPD) for stand density, stand basal area, top height and quadratic mean diameter (QMD) and the comparison of observed and predicted individual-tree dbh. The biological consistency analysis indicated that LS-FVS logically predicted the effect of site index on top height, stand basal area and QMD for black spruce and jack pine. However, the decrease in stand basal area at young ages was inconsistent with the normal development pattern of the forest stands under study and was attributed to deficiencies in the prediction of mortality. LS-FVS was found to underpredict stand density, stand basal area and top height and to over-predict QMD. Even though there were large errors in the prediction of change in stand density, LS-FVS was nevertheless consistent in the prediction of the shape of the dbh size distribution. Key words: FVS, Forest Vegetation Simulator, validation, biological consistency analysis

Distinguishing features of forest species on nutrient-poor soils in the Southern Cape

Bothalia ◽  
1984 ◽  
Vol 15 (1/2) ◽  
pp. 29-239 ◽  
Author(s):  
J. C. Daalen
Keyword(s):  
Cluster Analysis ◽  
Phenolic Compounds ◽  
Nutritional Status ◽  
Tropical Forest ◽  
Forest Vegetation ◽  
Forest Species ◽  
Correlation Matrices ◽  
Soil Variables ◽  
Indigenous Forest ◽  
Distinguishing Features

Soils of the indigenous forest-fynbos interface in the Southern Cape were sampled for chemical and physical analyses and compared by means of anlyses of variance. Correlations among soil variables were investigated by subjecting the correlation matrices to cluster analysis. Soil data were compared with that of fynbos and tropical forest areas. Morphological and physiological features of the forest vegetation, such as evergreenness, sclerophylly, phenolic compounds in the leaves, mast fruiting (i.e. gregarious fruiting) and root mat, were correlated with the soil nutritional status.

scholarly journals Performance of the Forest Vegetation Simulator in Managed White Spruce Plantations Influenced by Eastern Spruce Budworm in Northern Minnesota

2015 ◽  
Vol 61 (4) ◽  
pp. 723-730 ◽  
Author(s):  
Matthew B. Russell ◽  
Anthony W. D'Amato ◽  
Michael A. Albers ◽  
Christopher W. Woodall ◽  
Klaus J. Puettmann ◽  
...  
Keyword(s):  
Spruce Budworm ◽  
White Spruce ◽  
Forest Vegetation ◽  
Forest Vegetation Simulator ◽  
Eastern Spruce Budworm
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