Banca de QUALIFICAÇÃO: THAMILLES SANTA BARBARA SOUSA FRANCO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : THAMILLES SANTA BARBARA SOUSA FRANCO
DATE: 29/08/2023
TIME: 09:00
LOCAL: Sala 345B - Sala Multimeios da PROPPIT/BMT2
TITLE:

DYNAMICS OF SAP FLOW IN RESPONSE TO THE FLOODING PULSE IN TREE SPECIES FROM A FLOODPLAIN FOREST, SANTARÉM-PARÁ

KEY WORDS:

seasonality, water resistance, Amazon floodplain, tolerance, Amazon River.

PAGES: 35
BIG AREA: Outra
AREA: Ciências Ambientais
SUMMARY:

Water is a determining factor in the establishment and permanence of trees in diferente environments. Its availability is closely linked to physiological processes in plants and the proper functioning of ecosystems, especially in floodplain forests, which are highly dynamic ecosystems subject to a flood pulse every year. Flood cycles prompt tree species in this ecosystem to develop strategies that allow them to tolerate long lasting floods. These strategies result from combinations of different mechanisms. Studies of water relations enable a better understanding of these mechanisms with a focus on the physiological, morphological, and phenological behavior of plants. Thus, the determination of the xylem sap flow can be an important factor in the presence and quantification of water in tree stems, as well as represent the existing hydraulic connection among the soil, the plant, and the atmosphere. Hence, this work seeks to investigate how the seasonal dynamics provided by the flood pulse influence the xylem sap flow in endemic tree species of floodplain forests in Arapixuna/Santarém- PA, in Brazil.  Sap flow sensors will be installed in 04 frequent species of ecological importance for the floodplain ecosystems. The fluxes will be inferred continuously through the heat dissipation method, where they will be analyzed with environmental variables of the ambiance and physiological variables of the plants. These parameters will be correlated in order to understand which mechanisms govern the hydraulic behavior in the evaluated plants and how these can prescribe xylem sap flow patterns, identifying which mechanisms best represent water consumption in plants during flood periods, besides predicting the consequences of extreme weather events on the maintenance and survival of species in these environments.

COMMITTEE MEMBERS:
Presidente - 1794276 - JOSE MAURO SOUSA DE MOURA
Externo à Instituição - TOMAS FERREIRA DOMINGUES - USP
Externo à Instituição - TYEEN COLLIGAN TAYLOR - MSU