Banca de QUALIFICAÇÃO: HELTON BASTOS MACHADO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : HELTON BASTOS MACHADO
DATE: 30/06/2021
TIME: 09:00
LOCAL: Sala virtual no google meet
TITLE:

TIMBER POTENTIAL OF AN ANTHROPIZED FOREST IN THE SOUTHEAST OF THE STATE OF PARÁ.

KEY WORDS:

anthropized forests; forest dynamics; population diversity.

PAGES: 92
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUMMARY:

The unmanaged exploitation of wood causes disturbances in its horizontal structure and floristic composition. The continuous exploitation of natural forests causes the "depletion" of the usable stock of commercial species for future harvests. The denomination used here of anthropized forest is equivalent to the term "degraded forests" in the literature, which are those that have suffered a drastic reduction in biomass. However, if the anthropized forests are managed, one can improve timber utilization and provide sustainable development. The use of this anthropized ecosystem, through forest management aimed at these areas, will allow the maintenance of the natural resource, avoiding the modification of the landscape, mainly by agricultural use. The objective of this work is to characterize and determine the timber potential through dendometric parameters of a degraded forest in southeastern Pará. The data were obtained from the 100% Forest Inventory of 50 permanent monitoring plots (PPM) and divided into two areas, secondary I (30 PP) and secondary II (20 PP), of the Shet Farm area in the municipality of Dom Eliseu - PA. Through the data collected we obtained dominance, density, cover value, the diversity and similarity indices, and forest dynamics for the two areas. In the experimental area of Fazenda Shet, a total of 15,149 thousand arboreal individuals (DBH ≥ 5 cm) were inventoried, in the 50 permanent plots (12.5 ha of area in accumulated), being registered and identified 422 species. Of the total number of inventoried individuals, 62.06% arem present in secondary I and, 37.94% in secondary II. As for the ecological groups, 60.9% of the species belong to the shade tolerant group and 38.6% belong to the shade intolerant group. The secondary I and secondary II study areas presented Shannon-Weaver indices (H') of 4.50 nats.individu-1 and 4.88 nats.individu-1, of equability of 0.78 and 0.82 for individuals with DAP ≥ 5 cm, respectively. Diametric distribution by DBH class showed a concentration of 87.4% and 87.3% of individuals in the class ≤ 20 cm and, 1.4% and 1% of individuals are in classes ≥ 50 cm, for secondary I and II, respectively. Which describes the standard behavior in natural forests, clearly reflecting a predominantly young forest structure and, in a stage of recovery post-intensive exploitation. The species with highest density were Inga sp. and Sagotia racemosa Baill; highest dominance were Inga sp. and Cecropia distachya Huber; and highest IVC were Inga sp. and Cecropia distachya Huber, for secondary I and II, respectively. During the monitoring period, an inflow rate of 5.4% and 3.1% per year was recorded for secondary I and II, respectively. The mortality rate observed for secondary I and II were 6.6% and 4.4% per year, indicating a negative balance in forest dynamics. The annual periodic increase (PAI) in basal area showed an accumulated value of 0.83 and 0.86 m².ha-1.year-1; and in volume an accumulated value of 7.40 and 7.75 m³.ha-1.year-1 for secondary I and II, respectively.

BANKING MEMBERS:
Presidente - 745.945.679-91 - ADEMIR ROBERTO RUSCHEL - EMBRAPA
Interno - 2411797 - FABIANO EMMERT
Externa à Instituição - DARLISON FERNANDES CARVALHO DE ANDRADE
Externa à Instituição - FERNANDA ILKIU BORGES DE SOUZA - EMBRAPA