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Biomass equations for Spanish species

eq_biomass_montero_2005.Rd

Allometric equations adjusted for Spanish species

Usage

eq_biomass_montero_2005(species, component = "stem", return_r2 = 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., "tree", "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.

Value

A S7 list of parameters

Details

There are 35 species included in the model.

The tree components are divided into groups, and any of them can be introduced in the component argument:

  • AGB: all aboveground biomass components

  • BGB: all belowground biomass compoponents

  • tree or all: total tree biomass includying AGB and BGB

Then we have the second group of components, which are related to tree groups:

  • stem: includes the stem and bark

  • branches: includes all branches

  • roots: includes the roots (same as BGB)

Finally, we have the last level, which includes tree components (not all of them are available for all species): stem, thick branches (>7cm), medium branches (2-7cm), thin branches (0.5-2cm), needles, leaves, roots. In some species, there's "stem and thick branches", instead of two groups.

Users can check the list of supported species and their corresponding components in biomass_models.

See also

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

Examples

## get model parameters for silv_predict_biomass
eq_biomass_montero_2005("Pinus pinaster", "AGB")
#> <silviculture::ModelBiomass>
#>  @ equation  : chr "montero-2005"
#>  @ species   : chr "Pinus pinaster"
#>  @ component : chr "AGB"
#>  @ expression:'data.frame':	5 obs. of  2 variables:
#>  .. $ expression: chr  "exp(0,191593 **2) / 2) * exp(–3,43957) * (d ** 2,56636)" "exp(0,324283 **2) / 2) * exp(–23,0418) * (d ** 6,52359)" "exp(0,744427 **2) / 2) * exp(–6,66264) * (d ** 2,63946)" "exp(0,527572 **2) / 2) * exp(–4,66658) * (d ** 2,38009)" ...
#>  .. $ species   : chr  "Pinus pinaster" "Pinus pinaster" "Pinus pinaster" "Pinus pinaster" ...
#>  @ url       : chr "https://gregoriomontero.wordpress.com/wp-content/uploads/2016/09/2005-01-monografc3ada-forestal-13-m-produccic3"| __truncated__
#>  @ obs       : chr "Diameter is assumed to in centimeters, and height is assumed to be in meters"
#>  @ params    :List of 3
#>  .. $ return_r2: logi FALSE
#>  .. $ comp     : chr [1:5] "stem" "thick branches" "medium branches" "thin branches" ...
#>  .. $ r2       : num [1:5] 0.964 0.927 0.651 0.752 NA