aggregate parameters by diameter class, plot, tree species and year

This function calculates for each plot, tree species, year and diameter class some values per hectare: number of stems, basal area and volume of standing trees (for coppice based on data on shoot level), and volume of logs (= lying deadwood).

calculate_diam_plot_species(data_stems_calc, data_deadwood)

Arguments

data_stems_calc

dataframe on stem level measurements with variables plot_id, plottype, tree_measure_id, date_dendro, dbh_mm, height_m, species, alive_dead, decaystage, period, year, subcircle, plotarea_ha,... (output of function calc_variables_stem_level())

data_deadwood

dataframe on logs with variables plot_id, plottype, date_dendro, species, decaystage, calc_volume_m3, period and year (output of function load_data_deadwood())

Value

dataframe with columns plot, year, tree_species, dbh_class_5cm, basal_area_m2_ha, volume_m3_ha

Examples

if (FALSE) {
#change path before running
library(forrescalc)
data_dendro <-
  load_data_dendrometry("C:/MDB_BOSRES_selectieEls/FieldMapData_MDB_BOSRES_selectieEls.accdb")
data_shoots <-
  load_data_shoots("C:/MDB_BOSRES_selectieEls/FieldMapData_MDB_BOSRES_selectieEls.accdb")
data_stems <- compose_stem_data(data_dendro, data_shoots)
height_model <- load_height_models("C:/bosreservaten/Hoogtemodellen/")
data_stems_calc <- calc_variables_stem_level(data_stems, heightmodel)
data_deadwood <-
  load_data_deadwood("C:/MDB_BOSRES_selectieEls/FieldMapData_MDB_BOSRES_selectieEls.accdb")
calculate_diam_plot_species(data_stems_calc, data_deadwood)
}