Stand dynamics and management

Dynamic variables quantifying timber and biomass removals from thinnings and fellings, natural mortality losses, and ingrowth recruitment between simulation cycles.

Plot-level variables

• N_dead (DEAD_DENSITY) — decimal  •  trees/ha  •  output: N_dead

  Stand density of trees dying from natural mortality during projection.

• N_dead_ratio (DEAD_DENSITY_RATIO) — decimal  •  ratio  •  output: N_dead_ratio

  Proportion of dead tree density relative to total stand density (values between 0 and 1).

• G_dead (DEAD_BA) — decimal  •  m2/ha  •  output: G_dead

  Basal area represented by trees dying from natural mortality during projection.

• G_dead_ratio (DEAD_BA_RATIO) — decimal  •  ratio  •  output: G_dead_ratio

  Proportion of dead basal area relative to total stand basal area (values between 0 and 1).

• V_dead (DEAD_VOL) — decimal  •  m3/ha  •  output: V_dead

  Timber volume over bark represented by trees dying from natural mortality during projection.

• V_dead_ratio (DEAD_VOL_RATIO) — decimal  •  ratio  •  output: V_dead_ratio

  Proportion of dead timber volume relative to total stand volume (values between 0 and 1).

• W_dead (DEAD_WT) — decimal  •  t/ha  •  output: W_dead

  Total biomass of trees dying from natural mortality during projection.

• W_dead_ratio (DEAD_WT_RATIO) — decimal  •  ratio  •  output: W_dead_ratio

  Proportion of dead total biomass relative to total stand biomass (values between 0 and 1).

• quadratic_mean_diameter_increment (GROWTH_DG) — decimal  •  cm  •  output: dg_i

  Increment in quadratic mean diameter during projection.

• basal_area_increment (GROWTH_G) — decimal  •  m2/ha  •  output: G_i

  Increment in basal area during projection.

• mean_height_increment (GROWTH_HM) — decimal  •  m  •  output: Hm_i

  Increment in mean height during projection.

• dominant_height_increment (GROWTH_HO) — decimal  •  m  •  output: Ho_i

  Increment in dominant height during projection.

• volume_increment (GROWTH_V) — decimal  •  m3/ha  •  output: V_i

  Increment in volume during projection.

• total_biomass_increment (GROWTH_WT) — decimal  •  t/ha  •  output: WT_i

  Increment in total biomass during projection.

• N_ingrowth (ING_DENSITY) — decimal  •  trees/ha  •  output: N_ingrowth

  Stand density of ingrowth trees recruited into the inventory during projection.

• G_ingrowth (ING_BA) — decimal  •  m2/ha  •  output: G_ingrowth

  Basal area of ingrowth trees recruited into the inventory.

• V_ingrowth (ING_VOL) — decimal  •  m3/ha  •  output: V_ingrowth

  Timber volume over bark of ingrowth trees recruited into the inventory.

• W_ingrowth (ING_WT) — decimal  •  t/ha  •  output: W_ingrowth

  Total biomass of ingrowth trees recruited into the inventory.

• N_harvest (HARVEST_DENSITY) — decimal  •  trees/ha  •  output: N_harvest

  Stand density extracted trough silvicultural treatments.

• N_harvest_ratio (HARVEST_DENSITY_RATIO) — decimal  •  ratio  •  output: N_harvest_ratio

  Proportion of harvested stand density relative to pre-harvest total (values between 0 and 1).

• G_harvest (HARVEST_BA) — decimal  •  m2/ha  •  output: G_harvest

  Basal area extracted through silvicultural treatments.

• G_harvest_ratio (HARVEST_BA_RATIO) — decimal  •  ratio  •  output: G_harvest_ratio

  Proportion of harvested basal area relative to pre-harvest total (values between 0 and 1).

• V_harvest (HARVEST_VOL) — decimal  •  m3/ha  •  output: V_harvest

  Timber volume over bark harvested through silvicultural treatments.

• V_harvest_ratio (HARVEST_VOL_RATIO) — decimal  •  ratio  •  output: V_harvest_ratio

  Proportion of harvested timber volume relative to pre-harvest total (values between 0 and 1).

• W_harvest (HARVEST_WT) — decimal  •  t/ha  •  output: W_harvest

  Total biomass extracted through silvicultural treatments.

• W_harvest_ratio (HARVEST_WT_RATIO) — decimal  •  ratio  •  output: W_harvest_ratio

  Proportion of harvested total biomass relative to pre-harvest total (values between 0 and 1).

• Time_after_treatment (TIME_AT) — integer  •  years  •  output: TIME_AT

  Years elapsed since the last silvicultural treatment. Used in the Cistus ladanifer model for Zamora.

• Previous_treatment (TR) — integer  •  dimensionless  •  output: TR

  Binary indicator of previous silvicultural treatment in the stand (0 = untreated, 1 = cleared). Used in the Cistus ladanifer model for Zamora.

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Tree-level variables

• dbh_increment (dbh_i) — decimal  •  cm  •  output: d_i

  Increment in diameter at breast height, representing the last growth period.

• basal_area_increment (basal_area_i) — decimal  •  cm2  •  output: g_i

  Increment in tree basal area representing the last growth period.

• annual_height_increment (height_i) — decimal  •  m  •  output: h_i

  Increment in total tree height, representing the last growth period.

• volume_increment (vol_i) — decimal  •  dm3  •  output: vol_i

  Tree volume increment for the last growth period.

• total_biomass_increment (wt_i) — decimal  •  kg  •  output: wt_i

  Tree total biomass increment representing the last growth period.

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