A site index model for lodgepole pine in the sub-boreal spruce biogeoclimatic zone of British Columbia.

The focus of recent site productivity research in British Columbia has been to develop height-breast height age, growth intercept, and ecosystem-site index models. These models, together with a years-to-breast-height model, form a system for estimating site index and height. This system is described for western hemlock (Tsuga heterophylla (Raf.) Sarg.) in the interior of British Columbia. Forty-four western hemlock stem analysis plots were used in the construction of this system. As there are three models for estimating site index, the appropriate model for a given stand depends largely on the stand condition and the precision of the models. A graph of model precision against breast height age gives some assistance in deciding which model should be used to estimate site index. Key words: western hemlock, site index, height-age model, growth intercept model, years-to-breast-height model, ecosystem-site index model, model precision

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Developing a site index model for P. Pinaster stands in NW Spain by combining bi-temporal ALS data and environmental data

Forest Ecology and Management ◽

10.1016/j.foreco.2020.118690 ◽

2021 ◽

Vol 481 ◽

pp. 118690

Author(s):

Juan Guerra-Hernández ◽

Stefano Arellano-Pérez ◽

Eduardo González-Ferreiro ◽

Adrián Pascual ◽

Vicente Sandoval Altelarrea ◽

...

Keyword(s):

Site Index ◽

Environmental Data ◽

Nw Spain ◽

Index Model ◽

Site Index Model ◽

A Site

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Developing a site index model considering soil characteristics for Pinus thunbergii stands grown on the west coast of Korea

Journal of the Korean Society for Applied Biological Chemistry ◽

10.1007/s13765-012-3255-2 ◽

2013 ◽

Vol 56 (2) ◽

pp. 173-180 ◽

Cited By ~ 1

Author(s):

Hyun Kim ◽

Seong-Hun Jeong ◽

Dong-Gyu Kam ◽

Hyun-Jun Kim ◽

Soo-Min Choi ◽

...

Keyword(s):

West Coast ◽

Site Index ◽

Soil Characteristics ◽

Pinus Thunbergii ◽

The West ◽

Index Model ◽

Site Index Model ◽

A Site ◽

West Coast Of Korea

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A height-growth and site-index model for interior spruce in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia

Canadian Journal of Forest Research ◽

10.1139/x10-075 ◽

2010 ◽

Vol 40 (6) ◽

pp. 1175-1183 ◽

Cited By ~ 8

Author(s):

Zhengjun Hu ◽

Oscar García

Keyword(s):

British Columbia ◽

Full Range ◽

Site Index ◽

Height Growth ◽

Site Quality ◽

Growth Equation ◽

Index Model ◽

Interior Spruce ◽

Height Prediction ◽

Site Index Model

Height growth was modelled for spruce-dominated, even-aged stands in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia, Canada, using both stem analysis (SA) and permanent sample plot (PSP) data. The model is based on a stochastic differential equation (SDE) formulation of the Bertalanffy–Richards growth equation. The SDE approach accounts for serial correlation and heterogeneous variance and makes hypothesis testing possible. Statistically significant differences in height–age trends between SA and PSP data were found that may be attributed to bias caused by dominance changes in SA trees. Error structure in SA and PSPs was also significantly different. Combining both data sources in a way that respects these different error structures reduced bias and increased precision. Four parametrizations were tested; the best was a polymorphic version. The final model fit the data well with no appreciable bias over the full range of ages and site qualities. The currently used spruce site-index model was found to underestimate growth and overestimate site index in young stands. The new model can be recommended for height prediction and site-quality assessment in interior spruce.

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A site-index model remodified

Canadian Journal of Forest Research ◽

10.1139/x94-028 ◽

1994 ◽

Vol 24 (1) ◽

pp. 197-198 ◽

Cited By ~ 7

Author(s):

Bijan Payandeh ◽

Yonghe Wang

Keyword(s):

White Spruce ◽

Site Index ◽

Parameter Estimates ◽

Data Sets ◽

Index Model ◽

Site Index Model ◽

A Site

A previously reported site index model with unconstrained parameter estimates may not be amenable to extrapolation. A modification is presented that is more robust and has no apparent shortcomings. Results of fitting both models to white spruce (Piceaglauca (Moench) Voss) and aspen (Populustremuloides Michx.) data sets are presented and discussed.

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Climate sensitivity of trembling aspen radial growth along a productivity gradient in northeastern British Columbia, Canada

Canadian Journal of Forest Research ◽

10.1139/x07-227 ◽

2008 ◽

Vol 38 (5) ◽

pp. 1211-1222 ◽

Cited By ~ 20

Author(s):

Giovanni Leonelli ◽

Bernhard Denneler ◽

Yves Bergeron

Keyword(s):

British Columbia ◽

Populus Tremuloides ◽

Radial Growth ◽

Site Index ◽

Future Climate Change ◽

Trembling Aspen ◽

Tree Ring Chronology ◽

Index Model ◽

Productivity Gradient ◽

Site Index Model

Growth–climate relationships were analyzed for 15 stands of trembling aspen ( Populus tremuloides Michx.) along a productivity gradient in northeastern British Columbia. Productivity was evaluated with a site index model whose values varied between 6.65 and 26.93 m height at age 50 years. To assess the role of climate on radial growth, we built a tree-ring chronology for each site and then performed a dendroclimatic analysis by means of bootstrapped correlation functions using monthly and annual climatic variables. We found that trembling aspen sensitivity to climate varied across stands with different productivities in the study area. At the more productive sites, trees were more sensitive to climate, and ring widths were positively correlated, particularly with summer month precipitation prior to the year of growth. The different responses to climate along the productivity gradient are likely related to the differences in substrate properties; substrates at the more productive sites are richer in nutrients and have a better water holding capacity than those of the less productive sites. Our study suggests that the effects of future climate change on tree growth may not only increase towards the limit of a species distribution, but also towards richer and wetter stands.

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A site‐index model for pure and mixed stands ofBetula pendulaandBetula pubescensin Sweden

Scandinavian Journal of Forest Research ◽

10.1080/02827589709355396 ◽

1997 ◽

Vol 12 (2) ◽

pp. 149-156 ◽

Cited By ~ 26

Author(s):

Harry Eriksson ◽

Ulf Johansson ◽

Andres Kiviste

Keyword(s):

Site Index ◽

Mixed Stands ◽

Index Model ◽

Site Index Model ◽

A Site

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Early Height Growth and Site Index of Lodgepole Pine Under Wet and Dry Soil Moisture Regimes in British Columbia

Western Journal of Applied Forestry ◽

10.1093/wjaf/12.1.5 ◽

1997 ◽

Vol 12 (1) ◽

pp. 5-8

Author(s):

Gordon D. Nigh

Keyword(s):

Soil Moisture ◽

Pinus Contorta ◽

Lodgepole Pine ◽

Site Index ◽

Height Growth ◽

Moisture Regimes ◽

Indicator Variables ◽

Soil Moisture Availability ◽

A Site ◽

Growth Intercept

Abstract The objective of this study was to determine whether the relationship between site index and early height growth of lodgepole pine (Pinus contorta var. latifolia) is the same on wet and dry sites. If the height growth/site index relationship is the same for different site types, then only one growth intercept model is required to estimate site index. Indicator variables in nonlinear regression were used to incorporate soil moisture availability into a growth intercept model. One set of parameters in a site index/early height growth model was adequate for both wet and dry sites. This result was supported graphically. Therefore, only one growth intercept model is necessary for the sites examined in this study. West. J. Appl. For. 12(1):5-8.

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