Fiber Tracheid Length and Wood Specific Gravity of Seedlings as Ecotypic Characters in Liquidambar Styraciflua L.

Ecology ◽  
1972 ◽  
Vol 53 (1) ◽  
pp. 165-172 ◽  
Author(s):  
Joe E. Winstead
Keyword(s):  
Specific Gravity ◽  
Liquidambar Styraciflua ◽  
Tracheid Length ◽  
Wood Specific Gravity

Juvenile–mature relationships and heritability estimates of several traits in loblolly pine (Pinustaeda)

1984 ◽  
Vol 14 (6) ◽  
pp. 822-825 ◽  
Author(s):  
Judy A. Loo ◽  
C. G. Tauer ◽  
J. P. van Buijtenen
Keyword(s):  
Specific Gravity ◽  
Loblolly Pine ◽  
Genetic Correlations ◽  
Negative Relationship ◽  
Genetic Prediction ◽  
Tracheid Length ◽  
Wood Specific Gravity ◽  
Strong Negative Relationship ◽  
Heritability Estimates ◽  
Genetic Covariances

Heritability estimates for wood specific gravity of loblolly pine (Pinustaeda L.) in east Texas were high and relatively constant for all ages of wood sampled, but tracheid length was found to have low heritability at all ages. Heritability estimates for tracheid length declined with age after age 4 years. Coefficients of genetic prediction indicated that specific gravity of age 2 wood is a reliable predictor of wood specific gravity at age 25. Genetic covariances between juvenile and mature tracheid length were approximately zero. Coefficients of genetic prediction and genetic correlations between specific gravity and height and diameter at age 20 years indicated a strong negative relationship.

Wood quality of white spruce from north central Alberta

1984 ◽  
Vol 14 (2) ◽  
pp. 181-185 ◽  
Author(s):  
Eugene I. C. Wang ◽  
Michael M. Micko
Keyword(s):  
Specific Gravity ◽  
Wood Quality ◽  
White Spruce ◽  
Wood Properties ◽  
Lake Area ◽  
North Central ◽  
Tracheid Length ◽  
Wood Specific Gravity ◽  
Variation Patterns ◽  
Complex Variation

Wood specific gravity and tracheid lengths were measured from increment cores and discs of 10 white spruce (Piceaglauca (Moench) Voss) trees from each of four stands in the Slave Lake forest of north central Alberta. Such measurements were used to indicate the variation of wood properties among trees and within individual stems. The specific gravity of white spruce grown in the Slave Lake area was somewhat greater than that found in the Edson and Footner Lake areas reported earlier. Tracheid length was comparable to that found in trees from Footner Lake and longer than that from the Edson trees on the same age basis. Within a tree, growth rate affected wood specific gravity negatively. However, no correlation was evident between these parameters among trees. Seven trees were examined intensively to determine the variation of properties within the stem. The complex variation patterns from pith-to-bark and stump-to-crown are reported. Contrary to the Edson and Footner Lake trees, a very high corewood specific gravity was not observed. Tracheid length increased from pith to the periphery and from stump to crown.

Wood Specific Gravity in Species from Two Tropical Forests in Mexico

IAWA Journal ◽  
1987 ◽  
Vol 8 (2) ◽  
pp. 143-148 ◽  
Author(s):  
Josefina Barajas-Morales
Keyword(s):  
Specific Gravity ◽  
Tropical Forests ◽  
Tropical Rainforest ◽  
Deciduous Forest ◽  
Woody Species ◽  
T Test ◽  
Tropical Deciduous Forest ◽  
Wood Specific Gravity ◽  
Dry Deciduous Forest

The specific gravity of 220 woody species, half of them from a tropical rainforest, half from a tropical deciduous forest was measured. The two groups were compared using a Student t-test. The results show highly significant differences in specific gravity between the species from the two areas: woods from the dry deciduous forest tend to be much heavier than those from the rainforest.

scholarly journals Pan tropical biomass equations for Mexico's dry forests

2014 ◽  
Vol 32 (3) ◽  
pp. 367-376 ◽  
Author(s):  
José Návar
Keyword(s):  
Specific Gravity ◽  
Stand Structure ◽  
Gravity Data ◽  
Theoretical Models ◽  
Tropical Dry Forests ◽  
Large Sample Size ◽  
Dry Forests ◽  
Wood Specific Gravity ◽  
Spatial Coverage ◽  
Ecological Importance

This study reports a set of robust regional M-tree allometric equations for Mexico's tropical dry forests and their application to a forest inventory dataset for the States of Durango and Sinaloa, Mexico. Calculated M data from 15 reported equations were fitted, applied and validated for regional and global models. Proposed theoretical models, empirically derived equations, as well as global and local reported equations were fitted and applied to calculated M-tree data using wood specific gravity, diameter at breast height, and top height as exogenous variables. Empirically-derived, computer-based equations assessed the M-tree evaluations slightly better than the theoretical, the global and the local models. However, the theoretical models projected compatible M-tree values and deserve further attention once wood specific gravity data are collected in the field. Using the best fit equation, mean M plot density values of 30, 41 and 35 Mg ha-1 were estimated from 57 plots (1,600 m2 each), 217 plots (1,000 m2 each) and 166 plots (1,000 m2 each) in the tropical dry forests of the States of Durango, Tiniaquis and Vado Hondo (Sinaloa), respectively. The large sample size, the richness of the tested allometric models, the economic and ecological importance of this data-source, and the spatial coverage of these equations made this dataset uniquely useful for biomass, charcoal, and other bio-energy estimations, as well as for understanding the inherent heterogeneity of the stand-structure in dynamic tropical forest environments.

Place of Wood Specific Gravity in the Development of Advanced-Generation Seed Orchards and Breeding Programs

1982 ◽  
Vol 6 (3) ◽  
pp. 177-180
Author(s):  
J. B. Jett ◽  
J. T. Talbert
Keyword(s):  
Specific Gravity ◽  
Loblolly Pine ◽  
Second Generation ◽  
Improvement Program ◽  
Breeding Programs ◽  
The North ◽  
Wood Specific Gravity ◽  
High Heritability ◽  
Pinus Taeda L ◽  
Advanced Generation

Abstract Data from thinnings of 11 genetic tests with an average age of 10 years and from 364 eight-year-old second-generation selections were analyzed to provide an estimate of gain from one cycle of selection for wood specific gravity. Utilizing mid-parent, mature, wood specific gravities and progeny juvenile wood specific gravities, coefficients of genetic prediction, CGP = 0.55 and 0.41, were calculated for the genetic test thinning sample and second-generation selection sample. Expressed as a percentage of the mean, gain from selection was calculated to be 2.6 percent. A strategy was also developed to include wood specific gravity in the North Carolina State Cooperative's second-generation loblolly pine (Pinus taeda L.) improvement program. High heritability figures indicate little need to develop extensive family information for wood specific gravity in advanced-generation breeding programs.

Using volume-weighted average wood specific gravity of trees reduces bias in aboveground biomass predictions from forest volume data

2018 ◽  
Vol 424 ◽  
pp. 519-528 ◽  
Author(s):  
Le Bienfaiteur Takougoum Sagang ◽  
Stéphane Takoudjou Momo ◽  
Moses Bakonck Libalah ◽  
Vivien Rossi ◽  
Noël Fonton ◽  
...  
Keyword(s):  
Specific Gravity ◽  
Aboveground Biomass ◽  
Weighted Average ◽  
Volume Data ◽  
Wood Specific Gravity ◽  
Average Wood

Radial Gradients in Wood Specific Gravity, Water and Gas Content in Trees of a Mexican Tropical Rain Forest

Biotropica ◽  
2013 ◽  
Vol 45 (3) ◽  
pp. 280-287 ◽  
Author(s):  
Elisabeth Schüller ◽  
Miguel Martínez-Ramos ◽  
Peter Hietz
Keyword(s):  
Specific Gravity ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Gas Content ◽  
Wood Specific Gravity
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