Annals of Forest Science

, Volume 69, Issue 2, pp 167–180

Analysing the effects of local environment on the source-sink balance of Cecropia sciadophylla: a methodological approach based on model inversion

Original Paper

DOI: 10.1007/s13595-011-0131-x

Cite this article as:
Letort, V., Heuret, P., Zalamea, PC. et al. Annals of Forest Science (2012) 69: 167. doi:10.1007/s13595-011-0131-x

Abstract

• Context

Functional–structural models (FSM) of tree growth have great potential in forestry, but their development, calibration and validation are hampered by the difficulty of collecting experimental data at organ scale for adult trees. Due to their simple architecture and morphological properties, “model plants” such as Cecropia sciadophylla are of great interest to validate new models and methodologies, since exhaustive descriptions of their plant structure and mass partitioning can be gathered.

• Aims

Our objective was to develop a model-based approach to analysing the influence of environmental conditions on the dynamics of trophic competition within C. sciadophylla trees.

• Methods

We defined an integrated environmental factor that includes meteorological medium-frequency variations and a relative index representing the local site conditions for each plant. This index is estimated based on model inversion of the GreenLab FSM using data from 11 trees for model calibration and 7 trees for model evaluation.

• Results

The resulting model explained the dynamics of biomass allocation to different organs during the plant growth, according to the environmental pressure they experienced.

• Perspectives

By linking the integrated environmental factor to a competition index, an extension of the model to the population level could be considered.

Keywords

Cecropia Functional-structural model Model inversion Morphology Trophic competition 

Copyright information

© INRA and Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Department of Applied Mathematics and Systems (MAS)Ecole Centrale ParisChatenay-MalabryFrance
  2. 2.EPI DigiplanteINRIA SaclayORSAY CedexFrance
  3. 3.UMR AMAPINRAMontpellierFrance
  4. 4.UMR AMAPIRDMontpellierFrance
  5. 5.Departemento de Ciencias BasicasUniversidad de La SalleBogotaColombia
  6. 6.UMR AMAPCIRADMontpellierFrance
  7. 7.UMR ECOFOG Campus AgronomiqueINRAKourou cedexFrench Guiana

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