Use este identificador para citar ou linkar para este item: https://repositorio.inpa.gov.br/handle/1/14650
Título: Measures for sustainable forest management in the tropics – A tree-ring based case study on tree growth and forest dynamics in a Central Amazonian lowland moist forest
Autor: Worbes, Martin
Schöngart, Jochen
Palavras-chave: Cariniana Micrantha
Caryocar Villosum
Environmental Monitoring
Environmental Protection
Environmental Sustainability
Forest Dynamics
Forest Management
Growth Rate
Lifespan
Manilkara Huberi
Moisture
Nonhuman
Plant Stem
Radiometric Dating
Tree
Tree Growth
Tropics
Forest
Growth, Development And Aging
Procedures
Species Difference
Statistical Model
Tropic Climate
Conservation Of Natural Resources
Forests
Models, Statistical
Species Specificity
Trees
Tropical Climate
Data do documento: 2019
Revista: PLoS ONE
É parte de: Volume 14, Número 8
Abstract: The conservation of tropical forests is recognized as one of the most important challenges for forestry, ecology and politics. Besides strict protection, the sustainable management of natural forests should be enhanced as a key part of the foundation for the maintenance of tropical rain forest ecosystems. Due to methodological reasons it has been complicated to attain reliable growth data to plan sustainable felling cycles and rotation periods. Tree ring analyses enable the estimation of growth rates over the entire life span of trees and their age as well as giving hints from forest dynamics in previous centuries. For tree ring analysis, stem disk samples were taken from three important commercial tree species (Cariniana micrantha, Caryocar villosum and Manilkara huberi) in the upland (terra firme) forests of the Precious Woods Amazon logging company near Itacoatiara, Brazil. Based on radiocarbon estimates of individual growth zones, the annual nature of tree rings was proven for the three species. Tree rings were measured and the results used together with height estimates to model diameter, height and volume growth. The age of the eldest tree, a C. micrantha, was 585 yrs with 165 cm in diameter. The species’ diameter increments range from 0.20±0.12 cm yr-1 to 0.29±0.08 cm yr-1. At first sight, this is considerably lower than increments reported from other Amazonian or African timber species. Considering the respective wood density there is no significant difference in growth performance of dominant timber species across continents. The interpretation of lifetime tree ring curves indicate differences in shadow tolerance among species, the persistence of individuals in the understory for up to 150 years and natural stand dynamics without major disturbances. Management criteria should be adapted for the measured growth rates as they differed considerably from the Brazilian standards fixed by laws (felling cycle of 25–35 years and a common minimum logging diameter of 50 cm). Felling cycles should be increased to 32–51 years and minimum logging diameters to 63–123 cm depending on the species. © 2019 Worbes, Schöngart. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
DOI: 10.1371/journal.pone.0219770
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