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Biomass equations two Quercus species

eq_biomass_manrique_2017.Rd

Allometric equations adjusted for Quercus petraea and Quercus pyrenaica in Palencia, Spain

Usage

eq_biomass_manrique_2017(
  species,
  component = "AGB",
  return_r2 = FALSE,
  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_r2

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

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 two species in this model: Quercus petraea and Quercus pyrenaica

The tree components include:

  • stem: includes steam and the thickest branches

  • medium branches

  • thin branches

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

See also

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

Examples

## get model parameters for silv_predict_biomass
eq_biomass_manrique_2017("Quercus petraea", "AGB")
#> <silviculture::ModelBiomass>
#>  @ equation  : chr "manrique-2017"
#>  @ species   : chr "Quercus petraea"
#>  @ component : chr "AGB"
#>  @ expression:'data.frame':	3 obs. of  2 variables:
#>  .. $ expression: chr  "0.001333 * (d ** 2) * h" "0.006531 * (d ** 2) * h - 0.07298 * d * h" "0.023772 * (d ** 2) * h"
#>  .. $ species   : chr  "Quercus petraea" "Quercus petraea" "Quercus petraea"
#>  @ url       : chr "https://7cfe.congresoforestal.es/sites/default/files/comunicaciones/772.pdf"
#>  @ obs       : chr "Diameter is assumed to in centimeters, and height is assumed to be in meters"
#>  @ params    :List of 5
#>  .. $ return_r2  : logi FALSE
#>  .. $ return_rmse: logi FALSE
#>  .. $ comp       : chr [1:3] "stem and thick branches" "medium branches" "thin branches"
#>  .. $ r2         : num [1:3] 0.868 0.873 0.99
#>  .. $ rmse       : num [1:3] 29197 120699 155704