Skip to content

Pure stands of Spain

Status: Stable | Version: v1.0.0 (2026-08-28)

General description

  • Description: Distance-independent individual-tree growth model for pure stands in Spain
  • Target Species: Pinus sylvestris, Pinus uncinata, Pinus pinea, Pinus halepensis, Pinus nigra, Pinus pinaster, Pinus canariensis, Pinus radiata, Abies alba, Juniperus thurifera, Quercus robur, Quercus petraea, Quercus pyrenaica, Quercus faginea, Quercus ilex, Quercus suber, Populus nigra, Eucalyptus globulus, Eucalyptus camaldulensis, Fagus sylvatica, Castanea sativa, Quercus pubescens, Populus x canadensis, Betula alba (codes: 21, 22, 23, 24, 25, 26, 27, 28, 31, 38, 41, 42, 43, 44, 45, 46, 58, 61, 62, 71, 72, 243, 258, 273)
  • Application Region: Spain

Technical characteristics

  • Model Level: Individual tree
  • Allows Projection: Yes
  • Projection Time Step: 1, 2, 3, 4, 5, 10 years
  • Notes: Projection age not defined, although periods over 10 years are not recommended.

To view the step-by-step sequence of initialization, projection, and harvest, see the individual-tree model calculation flow diagram.

Required variables

To run this model in SIMANFOR, the initial inventory must include the following minimum data:

Plot level (Plots sheet)

  • Inventory and plot IDs
  • province (NFI volume)
  • biogeographical region, specific composition and stand origin (for initial heights if not included)

Tree level (Trees sheet)

  • Inventory, plot and tree IDs
  • species
  • expansion factor
  • dbh
  • quality and special parameters (see documentation)

Sample inventories

You can download the following sample inventories in Excel format to test this model:

Modules and equations

Breakdown of simulated biological processes and their methodological references:

  • Site index / Stand productivity: Aguirre et al. (2022)
  • Growth: Aguirre et al. (2026)
  • Height-diameter relationship / height estimation: Vázquez-Veloso et al. (2025)
  • Tree volume and taper: Badía et al. (2001), Calama & Montero (2006), Fernández-Manso & Sarmiento (2004), Rodríguez et al. (2015), López-Sánchez (2009), Manrique-González et al. (2017), Rodríguez (2009), MITECO (), MITECO (2025)
  • Biomass: Diéguez-Aranda et al. (2009), Manrique González et al. (2017), Montero et al. (2005), Ruiz-Peinado et al. (2011), Ruiz-Peinado et al. (2012)
  • Carbon content: Castaño-Santamaría & Bravo (2012), Diéguez-Aranda et al. (2009), Herrero de Aza et al. (2011), Montero et al. (2005), Telmo et al. (2010)
  • Diversity indexes: Omoro et al. (2010), Simpson (1949), Ulanowicz (2001), Bray & Curtis (1957)
  • Structural and size indexes: Varga et al. (2005), Moreno-Fernández & others (2025), Barbeito (2009)

References and documentation

  • How to Cite this Model:

SIMANFOR, 2026. Distance-independent individual-tree growth model for pure stands in Spain (v1.0.0). https://www.simanfor.es

  • SIMANFOR Citation:

Bravo, F., Ordóñez, C., Vázquez-Veloso, A., Michalakopoulos, S., 2025. SIMANFOR cloud Decision Support System: Structure, content, and applications. Ecological Modelling 499, 110912. https://doi.org/10.1016/j.ecolmodel.2024.110912