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Title: Growth models for two commercial tree species in upland forests of the Southern Brazilian Amazon
Authors: Andrade, Victor Hugo Ferreira
Machado, Sebastião do Amaral
Figueiredo Filho, Afonso
Botosso, Paulo César
Miranda, Bruno Palka
Schöngart, Jochen
Keywords: Timber
Felling Cycle
Handroanthus Serratifolius
Hymenaea Courbaril
Minimum Logging Diameter
Selective Logging
Tree Rings
Logging (forestry)
Commercial Species
Evergreen Forest
Forest Management
Forest Resource
Growth Modeling
Logging (timber)
Selective Logging
Sustainable Forestry
Timber Harvesting
Tree Ring
Tropical Forest
Upland Region
Forest Management
Selective Cutting
Hymenaea Courbaril
Issue Date: 2019
metadata.dc.publisher.journal: Forest Ecology and Management
metadata.dc.relation.ispartof: Volume 438, Pags. 215-223
Abstract: Despite all efforts to promote sustainable use of timber resources in tropical forests, the current management criteria still require adjustments at a species level, considering specific growth patterns and ecological features. Forest management in upland forests (terra firme) of the Brazilian Amazon region generally applies for all commercial tree species a common minimum logging diameter (MLD) of 50 cm and a felling cycle (FC) varying according to the harvest intensity between 25 and 35 years. In this study, we define species-specific FCs and MLDs for the two commercial tree species Hymenaea courbaril L. (Fabaceae) and Handroanthus serratifolius (Vahl) S.O. Grose (Bignoniaceae) from the terra firme of the Southern Brazilian Amazon, applying growth models based on the relationships between estimated tree age, diameter, height and volume. A total of 37 transversal cross-sections (20 stem discs from Hymenaea and 17 from Handroanthus) were obtained at a height of 20–60 cm above soil level in a private forest concession close to the municipality of Novo Aripuanã in the southern region of the Amazonas state. The two species are common in terra firme forests and have high wood densities of 0.76–0.96 g cm −3 (H. courbaril) and 0.85–1.08 g cm −3 (H. serratifolius). The mean age of H. courbaril and H. serratifolius, estimated by ring counting, varied from 104 to 241 years and both species had similar mean diameter increments of 3.9 ± 0.5 mm year −1 and 4.1 ± 0.6 mm year −1 , respectively. Both species present similar tree growth in diameter, height and volume resulting in a FC of 24.2 years and a MLD of 64.9 cm for H. courbaril, and a FC of 26.0 years and a MLD of 69.5 cm for H. serratifolius. These results demonstrate the need to adjust the selective logging systems practiced in the Brazilian Amazon region towards a species-specific management of timber species to increase the sustainability of selective logging. © 2019
metadata.dc.identifier.doi: 10.1016/j.foreco.2019.02.030
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