Estimates tree height from DBH

This function is intended to be used in silv_predict_height(). It implements the h-d equations developed in Vázquez-Veloso et al. (2025). These equations have been developed using the Spanish National Forest Inventory, and therefore, they should only be applied within Spain. The model includes parameters for 91 tree species.

Usage

eq_hd_vazquez_veloso_2025(
  species,
  bioregion = "mediterranean",
  origin = "natural",
  mixture = "pure"
)

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. If not specified, it takes the value "All the species", which corresponds to a generic model applicable to all species.
bioregion: The biogeopgrahic region of the species. Available options are: mediterranean, atlantic, alpine, and macaronesian. If not specified, it takes the value mediterranean, which is the most common region in Spain. You can check the distribution of regions here: https://ars.els-cdn.com/content/image/1-s2.0-S037811272500489X-gr1.jpg
origin: The origin of the stand. Available options are: natural and plantation. If not specified, it takes the value natural, which is the most common origin in Spain.
mixture: The species available in the stand. Available options are: pure and mix. Consider the characteristics of the plot you are evaluating and not the entire forest, as the conditions of each stand are different. In this study, it was considered a stand to be mixed when the combined proportion of at least two species exceeds 90% of the plot's basal area, and the proportion of both species is greater than 15% of the total. It does not matter which species is accompanying or the proportion of mixing. If not specified, it takes the value pure, which is the most common condition in Spain.

Value

A numeric vector with predicted height

Details

Details...#TODO

References

Vázquez-Veloso, A., Yang, S.-I., Bullock, B.P., Bravo, F., 2025. One model to rule them all: A nationwide height–diameter model for 91 Spanish forest species. Forest Ecology and Management 595, 122981. https://doi.org/10.1016/j.foreco.2025.122981

Examples