Banca de QUALIFICAÇÃO: Thaysa Costa Hurtado

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : Thaysa Costa Hurtado
DATA : 15/12/2022
HORA: 08:00
LOCAL: PPGCA
TÍTULO:

MERCURY BIOACCUMULATION IN NEOTROPICAL BIRDS

PALAVRAS-CHAVES:

Waterfowl; Bioindicators; Environmental contamination; Heavy metals

PÁGINAS: 62
GRANDE ÁREA: Outra
ÁREA: Ciências Ambientais
RESUMO:

Mercury is considered a global pollutant and is among the top three substances that pose an environmental health hazard. Of natural and anthropogenic origin, it has several physical and chemical forms that facilitate its distribution, biological enrichment and toxicity, having the capacity to remain for several years in contaminated soil and water. In aquatic environments, mercury undergoes methylation, acquiring its organic form, methylmercury, with potential binding capacity to proteins of biological membranes of aquatic organisms. It has the potential to bioaccumulate and biomagnify in the trophic chain, reaching waterfowl, top predators of this food chain. Worldwide research using this bird guild has been studying the dynamics and effects of this metal on environmental health. Studies indicate that the concentration of mercury can be increased in areas where there are water level fluctuations and vegetated habitats that experience wet and dry cycles during the year, thus, areas such as the Upper Paraguay Basin and the Amazon Basin, which have these characteristics, are predisposed to be mercury exposure hotspots. This work evaluated for the first time the bioaccumulation pattern of total mercury and methylmercury in primary and secondary wing feathers of the species Megaceryle torquata and Chloroceryle amazon, in the Upper Paraguay Basin and Amazon Basin. Considering that environmental contamination may be associated with the decline of birds, this dissertation also presents a review study on birds as bioindicators of environmental contamination.

MEMBROS DA BANCA:
Presidente - 83200001 - AUREA REGINA ALVES IGNACIO
Interno - 118188001 - ERNANDES SOBREIRA OLIVEIRA JUNIOR
Interno - 110049004 - MARIA APARECIDA PEREIRA PIERANGELI
Interno - 001.165.931-99 - WILKINSON LOPES LAZARO - UFRJ