CTAE - Canadian tree allometric equations

A collection of tools to calculate tree- or stand-level attributes developed for Canadian forests

Models included so far

• Canadian national tree aboveground biomass equations (Lambert et al. 2005, Ung et al. 2008).

• Individual tree volume equations for major Alberta tree species (Huang 1994)

• Volume-to-biomass conversions models (Boudewyn et al. 2007)

• Total volume to merchantable volume conversions models (Boudewyn et al. 2007)

• Simple growth and yield model (H, BA, V) (Ung et al. 2009)

Updated model parameters for models developed by Boudewyn et al (2007) downloaded from https://nfi.nfis.org/en/biomass_models.

Boudewyn, P.A.; Song, X.; Magnussen, S.; Gillis, M.D. (2007). Model-based, volume-to-biomass conversion for forested and vegetated land in Canada. Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC. Information Report BC-X-411. 112 p.

Huang, S. (1994). Ecologically Based Individual Tree Volume Estimation for Major Alberta Tree Species. Report 1 - Individual tree volume estimation procedures for Alberta: Methods of Formulation and Statistical Foundations. Alberta Environmental Protection, Land and Forest Service, Forest Management Division, Edmonton, AB.

Lambert, M. C., Ung, C. H., & Raulier, F. (2005). Canadian national tree aboveground biomass equations. Canadian Journal of Forest Research, 35(8), 1996–2018. https://doi.org/10.1139/x05-112

Ung, C.-H., Bernier, P., & Guo, X.-J. (2008). Canadian national biomass equations: new parameter estimates that include British Columbia data. Canadian Journal of Forest Research, 38(5), 1123–1132. https://doi.org/10.1139/X07-224

Ung, C.-H., Bernier, P.Y., Guo, X.J., Lambert, M.-C., 2009. A simple growth and yield model for assessing changes in standing volume across Canada’s forests. The Forestry Chronicle 85, 57–64. https://doi.org/10.5558/tfc85057-1

Installation

You can install the most recent version of the package by executing the code below:

devtools::install_github("ptompalski/CTAE")
library(CTAE)

Additional details

Alberta Natural Subregion Codes

Code	Subregion name
CM	Central Mixedwood
DMW	Dry Mixedwood
NM	Northern Mixedwood (Wetland Mixedwood)
BSA	Boreal Subarctic
PAD	Peace-Athabasca Delta (Peace River Lowlands)
LBH	Lower Boreal Highlands (Boreal Highlands)
UB	Upper Boreal Highlands (Boreal Highlands)
AP	Athabasca Plain
ALP	Alpine
SA	Subalpine
M	Montane
UF	Upper Foothills
LF	Lower Foothills
KU	Kazan Upland
FP	Foothills Parkland
PRP	Peace River Parkland
CP	Central Parkland
DMG	Dry Mixedgrass
FF	Foothills Fescue
NF	Northern Fescue
MG	Mixedgrass

Huang et al. model availability (V_Huang())

species	Province	ALP	AP	BSA	CM	CP	DMW	FP	KU	LBH	LF	M	NM	PAD	PRP	SA	UF
ABIE.BAL	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
BETU.PAP	✅
LARI.LAR	✅
PICE.ENG	✅
PICE.GLA	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
PICE.MAR	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
PINU.BAN	✅
PINU.CON	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
POPU.BAL	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
POPU.TRE	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
PSEU.MEN	✅
UNKN.HWD		✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅
UNKN.SWD		✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅	✅