Skip to contents

Biomass equations for 2 species in Castille and León (Spain)

eq_biomass_cudjoe_2024.Rd

Allometric equations adjusted for Quercus petraea, and Pinus sylvestris in Castille and León (Spain)

Usage

eq_biomass_cudjoe_2024(species, component = "AGB", return_rmse = FALSE)

Arguments

species

A character string specifying the scientific name of the tree species. It can be a column name if all the species are included in this model. See Details for available species.

component

A character string specifying the tree component for biomass calculation (e.g., "stem", "branches"). See Details.

return_rmse

A logical value. If TRUE, the function returns the root mean squared error (RMSE) of the selected model instead of the biomass value.

Value

A S7 list of parameters

Details

There are three species options in this model:

  • Quercus petraea

  • Pinus sylvestris

  • Mixed: stands with Quercus petraea and Pinus sylvestris

The tree components include some AGB components:

  • leaves: only for P. sylvestris

  • stem: for all species

  • medium branches and small brances: for all species

  • thick branches: for all species

  • AGB: total biomass, results of summing the previous components

See also

silv_predict_biomass(), biomass_models, eq_biomass_montero_2005(), eq_biomass_dieguez_aranda_2009() eq_biomass_ruiz_peinado_2011(), eq_biomass_ruiz_peinado_2012(), eq_biomass_manrique_2017(), eq_biomass_menendez_2022()

Examples

## get model parameters for silv_predict_biomass
eq_biomass_cudjoe_2024("mixed", "AGB")
#> <silviculture::ModelBiomass>
#>  @ equation  : chr "cudjoe-2017"
#>  @ species   : chr "Pinus sylvestris x Quercus petraea"
#>  @ component : chr "AGB"
#>  @ expression:'data.frame':	3 obs. of  2 variables:
#>  .. $ expression: chr  "0.1714*(-1) + 0.2388 * h" "0.7843 + 0.0952 * h" "1.8675*(-1) + 0.1974 * h"
#>  .. $ species   : chr  "Pinus sylvestris x Quercus petraea" "Pinus sylvestris x Quercus petraea" "Pinus sylvestris x Quercus petraea"
#>  @ url       : chr "https://doi.org/10.1016/j.scitotenv.2024.176061"
#>  @ obs       : chr "Diameter is assumed to in centimeters, and height is assumed to be in meters"
#>  @ params    :List of 4
#>  .. $ return_rmse: logi FALSE
#>  .. $ comp       : chr [1:3] "stem" "thick branches" "medium branches and small branches"
#>  .. $ r2         : num [1:3] NA NA NA
#>  .. $ rmse       : num [1:3] 0 0 0.1