Tree Height Growth Modelling Using LiDAR-Derived Topography Information

The concepts of ecotopes and forest sites are used to describe the correlative complexes defined by landform, vegetation structure, forest stand characteristics and the relationship between soil and physiography. Physically heterogeneous landscapes such as karst, which is characterized by abundant sinkholes and outcrops, exhibit diverse microtopography. Understanding the variation in the growth of trees in a heterogeneous topography is important for sustainable forest management. An R script for detailed stem analysis was used to reconstruct the height growth histories of individual trees (steam analysis). The results of this study reveal that the topographic factors influencing the height growth of silver fir trees can be detected within forest stands. Using topography modelling, we classified silver fir trees into groups with significant differences in height growth. This study provides a sound basis for the comparison of forest site differences and may be useful in the calibration of models for various tree species.

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Tree Barrier Prediction of Power lines based on Tree Height Growth Model

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/645/1/012008 ◽

2021 ◽

Vol 645 ◽

pp. 012008

Author(s):

Wu Jinqiu ◽

Liu Hanjun ◽

Yang Jiakai ◽

Chen Yuhao

Keyword(s):

Growth Model ◽

Tree Height ◽

Height Growth ◽

Power Lines ◽

Tree Height Growth

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Genetic resistance to western gall rust in jack pine and its relationship with tree height growth

Canadian Journal of Forest Research ◽

10.1139/cjfr-2014-0535 ◽

2015 ◽

Vol 45 (8) ◽

pp. 970-977 ◽

Cited By ~ 1

Author(s):

Y.H. Weng ◽

P. Lu ◽

Q.F. Meng ◽

M. Krasowski

Keyword(s):

Growth Traits ◽

Tree Height ◽

Jack Pine ◽

Height Growth ◽

Progeny Testing ◽

Gene Effects ◽

Individual Tree ◽

Improvement Programs ◽

Heritability Estimates ◽

Tree Height Growth

Developing resistance to western gall rust (WGR) is important for maintaining healthy and productive jack pine plantations. In this study, we estimated genetic parameters of resistance to WGR and its relationship with tree height growth, based on data collected from three second-generation full-sib progeny testing series of jack pine planted in New Brunswick, Canada. Results indicated that (i) resistance to WGR in jack pine was controlled by both additive and dominance gene effects, with the latter playing a greater role; (ii) narrow-sense heritability estimates for resistance to WGR were low (mean = 0.05; series range = 0.00∼0.09), and broad-sense heritability estimates were moderate on an individual-tree basis (mean = 0.53) and considerably higher on the full-sib family mean basis (mean = 0.87); (iii) additive genetic correlation between tree height growth and WGR incidence was low (≤0.06) in two series and only slightly higher and favorable (–0.19) in one series, suggesting that selection on growth traits would not negatively affect WGR resistance; and (iv) mid-parental additive genetic and dominance effects on WGR were empirically correlated (>0.65), indicating that incorporating breeding for WGR resistance into current jack pine tree improvement programs with a seed orchard approach could partly capture the benefit from dominance effects. Although genetic gains in WGR resistance could be realized through various breeding and deployment schemes, it appeared that rapid improvement could be achieved through backward selection on full-sib family means.

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Test of model of equivalence of tree height growth and transpiration rates in percolation-based phenomenology for root-soil interaction

Ecological Modelling ◽

10.1016/j.ecolmodel.2021.109853 ◽

2022 ◽

Vol 465 ◽

pp. 109853

Author(s):

A.G. Hunt ◽

B. Faybishenko ◽

T.L. Powell

Keyword(s):

Tree Height ◽

Height Growth ◽

Tree Height Growth

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Variation of conducting area in stems of European larch (Larix deciduas) growing in fresh mixed coniferous forest and fresh mixed forest sites

Journal of Forest Science ◽

10.17221/45/2009-jfs ◽

2010 ◽

Vol 56 (No. 1) ◽

pp. 18-27 ◽

Cited By ~ 3

Author(s):

M. Nawrot ◽

M. Jakubowski ◽

W. Pazdrowski ◽

K. Kaźmierczak ◽

M. Szymański

Keyword(s):

Coniferous Forest ◽

Mixed Forest ◽

Coefficient Of Determination ◽

Forest Site ◽

Age Classes ◽

Main Crop ◽

Forest Sites ◽

The Social ◽

Individual Trees ◽

Site Types

The paper presents an attempt to determine conducting area (CA), relative conducting area (CA.k–1) and mean ring conducting area (CAar) on discs cut at breast height from stems of larch trees growing in fresh mixed coniferous forest and fresh mixed forest sites, representing four age classes and the main crop according to Kraft’s classification. The value of CA increases with an improvement of the social class of tree position in the community, while no such dependences were found for the value of (CA.k–1). The parameter CAar, except for one case in age class IV in the fresh mixed coniferous forest site, increases with an improvement of the position a tree takes in the community and differentiates more markedly under the conditions of fresh mixed forest sites. Relative conducting area (CA.k–1) decreases markedly with an increase in the age of trees, which is confirmed by high values of the coefficient of determination. Moreover, the significance of differences between individual trees in the main crop according to Kraft and forest site types was tested in terms of the values of CAar. Calculated values may be used to describe the relationships between conducting area and the size of the assimilating organ more precisely than the total sapwood zone.

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