Banca de QUALIFICAÇÃO: CECÍLIA FERREIRA DE MELLO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : CECÍLIA FERREIRA DE MELLO
DATE: 06/05/2021
TIME: 14:00
LOCAL: on-line
TITLE:

Diversity and Ecosystem Stability of the Mansoniini Tribe (Diptera: Culicidae) in the Areas of Hydroelectric Use in the Amazon - UHE - Jirau

KEY WORDS:

Mansonia spp., Coquillettidia spp. Hydroelectric, Amazon, Ecology, Geometric, Morphometry, Electron Microscopy

PAGES: 140
BIG AREA: Ciências Biológicas
AREA: Parasitologia
SUBÁREA: Entomologia e Malacologia de Parasitos e Vetores
SUMMARY:

Ecosystem stability is an important corollary of sustainability, since major disturbances, both
natural and human-induced, undoubtedly have a significant effect on the functioning of
communities in the ecosystem. The main natural wetlands in the Brazilian Amazon are
characterized by hydrological extremes of flood and drought, therefore, they are excellent
models for ecological studies. Anthropogenic wetlands, on the other hand, disturbance
processes are caused by different types of human action or intervention. In the construction of
hydroelectric plants, large lakes are formed, completely changing the landscape, which tends
to favor floating aquatic macrophytes, constituting an excellent substrate for many animals. A
Mansoniini tribe is a group of mosquitoes belonging to a Culicina subfamily, and closely
associated with this type of environment, its representatives (Mansonia spp., Coquillettidia
spp.) Characterize regions with a high degree of anthropization and constitute an obligation to
human health due to their anthropophilic behavior. Several species of this tribe can be potential
transmitters of pathogens since they have been found naturally infected with arboviruses and
microfilariae in different regions of the world. In order to study the diversity, ecology,
morphology and ecosystem stability of adults of the Mansoniini Tribe, our research was carried
out in areass of influence of the Jirau Hydroelectric Power Plant, under the domain of the
Amazon Biome in the state of Rondonia, Brazil in the period between February of 2016 in
November 2019. We had as main method of sampling adults such as Shannon's light traps and
CDC type, Castro's Capturer and electric vacuum cleaner. For the immature sampling, we use
a quadrant with an areas of 1 m2. In this thesis there are three five chapters. Chapter I contains
the fauna survey of the species of the Mansoniini Tribe in the studied areas with the
characterization of the richness, diversity and dominance of the species, where it can be
observed that anthropogenic disturbances are favoring the ecological succession of species of
the Mansoni Tribe promoting a stability of domain throughout the seasonal period in the studied
areas. In the second chapter, the degree of active dispersion and the movement patterns of the
properties of Mansonia spp. by means of marking, releasing and recapture of the specimens, in
addition, the population size of Mansonia spp. in the areas of hydroelectric use in the Amazon
- UHE Jirau. A flight radius of up to 2 km was observed in the dispersion of the Mansoniini
Tribe species, studies also reveal that the seasonal stability of the Mansoniini Tribe is associated
with the size of its populations. In the third chapter, the assessment of Mansonia spp. in aquatic
plants in the Madeira River basin in the lentic and lotic environments, state of Rondônia, Brazil,
makes it clear that the postures of Mansonia spp. are more abundant in Eichornia crassipes and
Pistia sp. and positive stabilization for temperature, Ph and Conductivity, mainly in the rainy
season, decreasing strongly in the dry season. In the fourth chapter, the influence of seasonality
on the morphological variability of wings in populations of Mansonia amazonensis was
analyzed. It was observed that there is intrapopulation variability in size and conformation of  populations of Ma. Amazonensis in the Areas of hydroelectric use in the Amazon UHE - Jirau. In the fifth chapter the description of the ultrastructure of Coquillettidia venezuelensis eggs was carried out, the measurements and characters contrasted with the patterns observed in the eggs of other Coquillettidia species and Coquillettidia species subsidies for the best in class of this species.

BANKING MEMBERS:
Externa à Instituição - ANA LAURA CARBAJAL DE FUENTE
Presidente - 387200 - FRANCISCO GERSON ARAUJO
Interno - 005.893.247-05 - JERONIMO AUGUSTO FONSECA ALENCAR - UFRJ
Externo à Instituição - RONALDO FIGUEIRÓ PORTELLA PEREIRA