Banca de DEFESA: BRUNA MARIA DA SILVA BASTOS

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : BRUNA MARIA DA SILVA BASTOS
DATE: 20/02/2024
TIME: 14:00
LOCAL: Auditório do ICA
TITLE:

CARBON STOCK IN WOOD OF DIFFERENT DENSITIES BASIC INFORMATION IN FOREST MANAGEMENT IN THE AMAZON

KEY WORDS:

carbon fixation, biomass stock, physical properties.

PAGES: 61
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Manejo Florestal
SPECIALTY: Economia Florestal
SUMMARY:

Trees play a fundamental role as carbon sinks, contributing significantly to climate regulation.
However, species diversity can influence variations in carbon stock based on the floristic
composition of the areas. Harvesting wood in forests under forestry management frees up space
for the establishment of new plants, which contribute to the sequestration of carbon dioxide
(CO2) from the atmosphere. Therefore, it is important to determine the space freed up in the
forest with harvested wood. The basic density (DB) and chemical structure of wood are
important characteristics that can provide information about this, in addition to being relevant
quality factors in the selection of species. This study aimed to determine the carbon content (C)
stored in the wood of twelve main species harvested in forest management plans in the State of
Pará, filling a gap in the literature. The species were selected based on the Forest Exploration
Authorizations (AUTEF) of a Forest Management Unit in the Paru State Forest, representing
the highest volume values harvested for commercial purposes in the last three years. For each
species, three trees were selected, totaling 36 trees, with a diameter at breast height of 50-150
cm. 10 cm thick discs were obtained in the field at the base of each tree and taken for analysis
of basic density and carbon content in the Tree Taxonomy laboratory at the Universidade
Federal Rural da Amazônia. Basic density data were tested for normality and homogeneity of
variance. The Kruskall-Wallis non-parametric test was used to verify differences between
species. The results of determining the basic density of wood showed that 66.7% of the species
have high basic density and that the highest specific mass values were obtained for
Handroanthus serratifolius, Manilkara elata and Apuleia leiocarpa, all in the high density
class. In the result of the elemental analysis, the carbon content represents, in the composition
of the biomass of six species, it was around 50%, while for another five species the determined
values were above this percentage. Of these, the highest carbon content was obtained in the
biomass of Handroanthus serratifolius, differing significantly from the other species, while the
lowest carbon content was found in samples of Micropholis venulosa. These results suggest the
importance of considering the basic density and carbon content of wood when selecting species
for forest management, aiming not only at economic aspects, but also at the environmental and
social impacts of forestry activities.

BANKING MEMBERS:
Presidente - 2366025 - GRACIALDA COSTA FERREIRA
Externa à Instituição - JULIANA LIVIAN LIMA DE ABREU - SEMAS
Interna - 2410727 - LINA BUFALINO
Interna - 1550131 - MARCELA GOMES DA SILVA