INDIRECT ESTIMATION OF SOUTHERN PINE BEETLE (COLEOPTERA: SCOLYTIDAE) GALLERY LENGTH UTILIZING HOST CHARACTERISTICS

1981 ◽  
Vol 113 (3) ◽  
pp. 199-203
Author(s):  
T. E. Nebeker ◽  
O. P. Hackney ◽  
R. R. Hocking
Keyword(s):  
Tree Height ◽  
Southern Pine Beetle ◽  
Sample Period ◽  
Bark Thickness ◽  
Tree Diameter ◽  
Breast Height ◽  
Pine Beetle ◽  
Time Of Year ◽  
Total Tree ◽  
Host Characteristics

AbstractA technique is presented that requires no direct measurement of gallery length to estimate the total gallery length. Required to obtain the estimate are: (1) an appropriate model for time of year, sample period, and host, (2) tree diameter at breast height, (3) length of infested bole, (4) total tree height, and (5) inner bark thickness. The technique is accurate, less time consuming, and less expensive than direct estimation techniques.

scholarly journals ABOVEGROUND DENDROMASS ESTIMATION OF JUVENILE PAULOWNIA SP.

2017 ◽  
Vol 1 (24) ◽  
Author(s):  
Tatiana Stankova ◽  
Veselka Gyuleva ◽  
Dimitar Dimitrov ◽  
Hristina Hristova ◽  
Ekaterina Andonova
Keyword(s):  
Regression Models ◽  
Goodness Of Fit ◽  
Tree Height ◽  
Early Growth ◽  
Biomass Estimation ◽  
Allometric Relationships ◽  
Tree Diameter ◽  
Breast Height ◽  
Ornamental Trees ◽  
Total Tree

Species of the genus Paulownia have been introduced to Bulgaria since the beginning of the XXthcentury and their multipurpose uses - as ornamental trees, for wood and biomass production- have been tested ever since. We present a study, which examines the early growth of four Paulowniaclones at southern locations in Bulgaria and derives biometric models for dendromass estimationof juvenile Paulownia trees.The data originated from two experimental plantations established on nursery land using one-yearoldin vitro propagated plant material. Forty six, 1 to 3 year-old saplings from two clones of P. tomentosaand two P. elongata × P. fortunei hybrids were sampled. Their stem biomass was modeledas a function of the breast height tree diameter and total tree height or the stem diameter aloneand a set of goodness-of-fit criteria was applied to select the most adequate among the 29 testedformulations. The regression models were fitted in log-transformed form to the logarithm of thestem biomass and MM correction factor for bias was applied to the back-transformed predictiondata. Two allometric relationships were derived, which adequately assess stem dendromass ofyoung Paulownia sp. from easily measurable tree characteristics. Both models are applicable forstem biomass estimation of juvenile Paulownia trees of diameter up to 5 cm and total height upto 3.5 m.

scholarly journals Comparison of Planted Loblolly and Slash Pine Performance in Southeast Texas

1993 ◽  
Vol 17 (1) ◽  
pp. 26-31 ◽  
Author(s):  
J. David Lenhart ◽  
Gary D. Kronrad ◽  
Michael S. Fountain
Keyword(s):  
Loblolly Pine ◽  
Tree Height ◽  
Pinus Elliottii ◽  
Slash Pine ◽  
Volume Index ◽  
Fusiform Rust ◽  
Tree Diameter ◽  
Stem Straightness ◽  
Southeast Texas ◽  
Total Tree

Abstract The performance of young (less than 10 yr) loblolly (Pinus taeda L.) and slash (Pinus elliottii Engelm.) pine trees was compared on planted sites in southeast Texas. Performance was compared for: total tree height; tree diameter; height to live tree crown; tree volume index,; incidenceof fusiform rust (Cronartium quercuum [Berk.] Miyabe ex Shirai f. sp. fusiforme); crookedness of stems; and survival rates. For these young trees, slash pine tended to perform better in southeast Texas than loblolly pine in total tree height, tree diameter, stem size, height to first livebranch and stem straightness. However, loblolly pine was less susceptible to fusiform rust than slash pine, and its mortality rate was lower than slash pine. However, based on the performance of these young plantations, a recommendation on the preferred pine species to plant in southeast Texasmight be premature. South. J. Appl. For. 17(1):26-31.

scholarly journals HeightߝDiameter Equations for 12 Upland Species in the Missouri Ozark Highlands

2007 ◽  
Vol 24 (2) ◽  
pp. 149-152 ◽  
Author(s):  
James R. Lootens ◽  
David R. Larsen ◽  
Stephen R. Shifley
Keyword(s):  
Tree Species ◽  
Tree Height ◽  
Tree Diameter ◽  
Ozark Highlands ◽  
The Mean ◽  
Predicted Values ◽  
Total Tree

Abstract We calibrated a model predicting total tree height as a function of tree diameter for nine tree species common to the Missouri Ozarks. Model coefficients were derived from nearly 10,000 observed trees. The calibrated model did a good job predicting the mean heightߝdiameter trend for each species (pseudo-R2 values ranged from 0.56 to 0.88), but for a given tree diameter observed tree heights were highly variable. We also present a technique for incorporating the observed variation in tree heights in the predicted values.

Mechanistically based, allometric models to predict tree diameter and height in even-aged monoculture of Eucalyptusregnans F. Muell.

1989 ◽  
Vol 19 (2) ◽  
pp. 270-273 ◽  
Author(s):  
P. W. West ◽  
C. L. Beadle ◽  
C. R. A. Turnbull
Keyword(s):  
Tree Height ◽  
Allometric Relationships ◽  
Allometric Models ◽  
Tree Diameter ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Vertical Stability ◽  
Structural Argument ◽  
Individual Trees ◽  
Geometrical Argument

A randomly selected sample of 22 trees was felled in a stand in a 20-year-old monoculture of Eucalyptusregnans F. Muell. in southern Tasmania. One-half of the trees were from a section of the stand that had been heavily thinned 10 years previously, and the remainder were from the unthinned section. The trees were sectioned and the fresh weights of their stems (including bark) and crowns (leaves plus branches) determined. By combining a geometrical argument about the shape of tree stems with a structural argument about their vertical stability, allometric relationships were established relating tree diameter at breast height or tree height to total aboveground weight and the ratio of crown to stem weight. These relationships were found to hold in both the thinned and unthinned sections of the experiment. When combined with a model to predict biomass of individual trees, these models can be used to predict diameter or height of individual trees in E. regnans monoculture.

Rating East Texas Stands for Southern Pine Beetle Susceptibility

1981 ◽  
Vol 5 (1) ◽  
pp. 7-10 ◽  
Author(s):  
Ray R. Hicks ◽  
James E. Howard ◽  
Kenneth G. Watterston ◽  
Jack E. Coster
Keyword(s):  
Management Strategies ◽  
Basal Area ◽  
Tree Height ◽  
Southern Pine Beetle ◽  
East Texas ◽  
Southern Pine ◽  
Ranking System ◽  
Land Form ◽  
Pine Beetle ◽  
Input Variables

Abstract A ranking system developed in east Texas classifies the susceptibility of host stands to southern pine beetle (Dendroctonous frontalis Zimm.) into four categories. Input variables include pine basal area per acre, average tree height, and a categorical evaluation of land form. Higher-hazard stands are generally overstocked, have taller trees, and grow on wet or low-lying sites. Management strategies are recommended for the various hazard categories.

Predicting Pole Classes for Longleaf Pine Based on Diameter Breast Height

1992 ◽  
Vol 16 (2) ◽  
pp. 79-82 ◽  
Author(s):  
Harold E. Quicke ◽  
Ralph S. Meldahl
Keyword(s):  
Longleaf Pine ◽  
Pinus Palustris ◽  
National Standards ◽  
Bark Thickness ◽  
Southern Pine ◽  
Tree Diameter ◽  
Breast Height

Abstract A table for estimating longleaf pine (Pinus palustris Mill.) pole classes in the field is presented. The table was derived by converting the American National Standards Institute's dimensions of southern pine poles from minimum circumference at 6 ft from the butt of the pole to minimum tree diameter breast height outside bark. The conversion is based on tree taper, stump height, length trimmed off the butt of the tree at the pole yard, and bark thickness. The table is compared to a previously published table for determining southern pine pole classes from dbh. South. J. Appl. For. 16(2):79-82.

scholarly journals Floristic and structure of an Amazonian primary forest and a chronosequence of secondary succession

2016 ◽  
Vol 46 (2) ◽  
pp. 133-150 ◽  
Author(s):  
Camila Valéria de Jesus SILVA ◽  
João Roberto dos SANTOS ◽  
Lênio Soares GALVÃO ◽  
Ricardo Dal'Agnol da SILVA ◽  
Yhasmin Mendes MOURA
Keyword(s):  
Structural Analysis ◽  
Basal Area ◽  
Tree Height ◽  
Intermediate Stage ◽  
Primary Forest ◽  
Breast Height ◽  
Floristic Analysis ◽  
Kolmogorov Smirnov ◽  
Total Tree ◽  
Fisher’S Alpha

ABSTRACT The analysis of changes in species composition and vegetation structure in chronosequences improves knowledge on the regeneration patterns following land abandonment in the Amazon. Here, the objective was to perform floristic-structural analysis in mature forests (with/without timber exploitation) and secondary successions (initial, intermediate and advanced vegetation regrowth) in the Tapajós region. The regrowth age and plot locations were determined using Landsat-5/Thematic Mapper images (1984-2012). For floristic analysis, we determined the sample sufficiency and the Shannon-Weaver (H'), Pielou evenness (J), Value of Importance (VI) and Fisher's alpha (α) indices. We applied the Non-metric Multidimensional Scaling (NMDS) for similarity ordination. For structural analysis, the diameter at the breast height (DBH), total tree height (Ht), basal area (BA) and the aboveground biomass (AGB) were obtained. We inspected the differences in floristic-structural attributes using Tukey and Kolmogorov-Smirnov tests. The results showed an increase in the H', J and α indices from initial regrowth to mature forests of the order of 47%, 33% and 91%, respectively. The advanced regrowth had more species in common with the intermediate stage than with the mature forest. Statistically significant differences between initial and intermediate stages (p<0.05) were observed for DBH, BA and Ht. The recovery of carbon stocks showed an AGB variation from 14.97 t ha-1 (initial regrowth) to 321.47 t ha-1 (mature forests). In addition to AGB, Ht was also important to discriminate the typologies.

scholarly journals Estimating Tree Diameter and Volume with a Taper Model and Large-Scale Photo Measurements

2001 ◽  
Vol 18 (4) ◽  
pp. 110-118 ◽  
Author(s):  
R.J. Hall ◽  
Y. Wang ◽  
D.J. Morgan
Keyword(s):  
Large Scale ◽  
Linear Models ◽  
Nonlinear Models ◽  
Model Development ◽  
Tree Height ◽  
Field Measurements ◽  
Tree Diameter ◽  
Volume Estimates ◽  
Total Tree ◽  
Taper Model

Abstract Large-scale photo (LSP) mensurational procedures were developed, in part, to reduce field costs by replacing much of the ground sampling with less expensive photo measurements. The conventional LSP approach uses photo measurements of tree height and crown area, which serve as independent variables in models, to predict tree diameter or volume. This study compared 18 linear and nonlinear model forms for estimating tree diameters and assessed the use of a provincial taper model to estimate total tree volume from LSP data. On average, linear models produce R2, root mean square error, and mean bias values that were at least equivalent to, if not statistically better than, nonlinear models for the range of data evaluated. For lodgepole pine, white spruce and a composite of two deciduous species (trembling aspen and balsam poplar), total volume estimates were not statistically different from those estimated from field measurements. A comparative analysis of LSP and field sampling costs suggests the use of taper models in LSP mensuration could save considerable cost and effort in data collection and model development. This finding may result in an increased use of LSP in operational forest inventory work. North J. Appl. For. 18(4):110–118.

Total and Merchantable Volume Equations and Taper Functions for Southwestern Ponderosa Pine

1988 ◽  
Vol 3 (4) ◽  
pp. 123-125 ◽  
Author(s):  
J. P. McTague ◽  
W. F. Stansfield
Keyword(s):  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Tree Height ◽  
Stem Diameter ◽  
Height Functions ◽  
Breast Height ◽  
Pine Trees ◽  
Yellow Pine ◽  
Total Tree ◽  
Volume Equations

Abstract Total outside and inside bark cubic foot volume equations are presented for southwestern ponderosa pine (Pinus ponderosa) that are functions of total tree height, diameter breast height, and Girard form class. These equations are appropriate for trees of any size or age, and no distinction is made between "blackjack" and "yellow pine" trees. Equations are included to predict merchantable volume to any upper stem diameter or merchantable height. Taper and merchantable height functions are indirectly derived from the merchantable volume equations. West. J. Appl For. 3(4):123-125, October 1988.

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