Banca de QUALIFICAÇÃO: DEISIANE SANTOS DA CRUZ

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : DEISIANE SANTOS DA CRUZ
DATE: 29/11/2023
TIME: 14:00
LOCAL: Google Meet (Gmail UFRA) - online
TITLE:

Tree mortality and necromass stock in a secondary forest in the northeast of Pará.

KEY WORDS:

Amazon, forest dynamics, forest debris, decomposition, wind

PAGES: 43
BIG AREA: Ciências Agrárias
AREA: Recursos Florestais e Engenharia Florestal
SUBÁREA: Tecnologia e Utilização de Produtos Florestais
SPECIALTY: Propriedades Fisico-Mecânicas da Madeira
SUMMARY:

The dynamics of ecosystems is a basic feature that maintains forest balance, preserving its structure and composition over time, which includes aspects such as growth, recruitment and mortality. Trees being an important and complex process in forest ecosystems. However, fully understanding the death of forest individuals and their effects is still a challenge, especially in secondary forests. Given this, the objective of this research is to investigate how the trees are dying and the necromassa in the woody reservoir of the dead trees in a secondary forest fragment in the municipality of Deigarapé-Açu in Northeast Pará. The study is being conducted at the Igarapé-Açu School Farm-Feiga, belonging to the Federal Rural University of Amazonia-UFRA, located in the municipality of Igarapé-Açu. The sampling of this work was in conglomerate, being distributed 30 installments in the drawing of Cruz de Malta. All forest debris (trees and branches) over 10 cm in diameter that cross the lines of the inventory were quantified. Being measured and evaluated in this paper, the diameters (cm) length (m), the direction of falling (n, s, l and o), the modes of death (broken or exhibited roots) the classification of decomposition levels (ND) and wood samples of 5 cm from all decomposition levels and diameter classes were removed for future analysis of the basic density. In addition, it has been evaluated if the edge effect influences the mortality of the trees in this forest fragment. To statically assess mortality, the Rayleigh test was applied to Falling direction, chi-square (x²) for death mode and decomposition level and Spearman correlation for the edge effect. 47 individuals were quantified, 38 trees and 9 branches. Statistical tests do not reveal significant p-value for death mode, falling direction and edge analysis, and it is significant only the level of decomposition in the study area, but there is a sign that the edge effect may have influence on mortality The trees also observed a significant number of individuals killed in the initial classes of the diameter distribution (cm) and in the intermediate classes of length (m). At first it can be concluded that ecological factors can determine the characteristics of mortality, but there is a need for further investigations. In addition, it is expected to determine the basic density of wood for the decomposition levels established in this work to calculate necromassa stock in this forest. Since, it is intended to determine the stock of the tree necromasa at different levels of decomposition from its own basic density.

BANKING MEMBERS:
Presidente - 2411797 - FABIANO EMMERT
Interna - 613.866.002-10 - FRANCIMARY DA SILVA CARNEIRO - UFRA
Externo ao Programa - 388496 - SUEO NUMAZAWA
Externo à Instituição - ADRIANO JOSÉ NOGUEIRA LIMA - INPA
Externo à Instituição - DEUSDEDITH CRUZ FILHO