iForest - Biogeosciences and Forestry


Developing a stand-based growth and yield model for Thuya (Tetraclinis articulata (Vahl) Mast) in Tunisia

Tahar Sghaier (1)   , Mariola Sánchez-González (2), Salah Garchi (1), Youssef Ammari (1), Isabel Cañellas (2), Rafael Calama (2)

iForest - Biogeosciences and Forestry, Volume 9, Issue 1, Pages 79-88 (2015)
doi: https://doi.org/10.3832/ifor1389-008
Published: Jun 23, 2015 - Copyright © 2015 SISEF

Research Articles

Thuya (Tetraclinis articulata (Vahl) Mast) is a Mediterranean forest species mainly occupying semiarid environments in North African countries, where it provides important ecological and economical services, such as biodiversity conservation, soil protection against erosion, fuelwood, timber for fencing, construction and handicraft, resins, etc. Despite the importance of the species, there is a severe lack of scientific knowledge as regards the management of these forests or modeling tools to support multifunctional forest management decision making. In the present work, we developed a stand-level integrated model for the management of Thuya forests in Tunisia. The model comprises a family of site index curves, built using the Generalized Algebraic Difference Approach (GADA) method, which provides predictions for stand growth, aboveground biomass, total and merchantable volumes, along with a non-linear system of stand level equations presented as stand density management diagrams (SDMD). The developed model has been used to define, characterize and compare four different management specific schedules for different site qualities and multifunctional objectives.


Site Index Model, Stand Density Management Diagram, Semiarid Environments, Stand-level Model, Management Schedule, Thinning

Authors’ address

Tahar Sghaier
Salah Garchi
Youssef Ammari
Institut National de Recherches en Génie Rural, Eaux et Forêts (INRGREF), B.P. 10, Avenue Hédi Karray 2080, Ariana (Tunisia)
Mariola Sánchez-González
Isabel Cañellas
Rafael Calama
CIFOR-INIA, Ctra A Coruña km 7.5, E-28040 Madrid (Spain)

Corresponding author


Sghaier T, Sánchez-González M, Garchi S, Ammari Y, Cañellas I, Calama R (2015). Developing a stand-based growth and yield model for Thuya (Tetraclinis articulata (Vahl) Mast) in Tunisia. iForest 9: 79-88. - doi: 10.3832/ifor1389-008

Academic Editor

Chris Eastaugh

Paper history

Received: Jun 28, 2014
Accepted: Mar 08, 2015

First online: Jun 23, 2015
Publication Date: Feb 21, 2016
Publication Time: 3.57 months

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