Banca de DEFESA: WILLIAN DIAS ARAUJO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : WILLIAN DIAS ARAUJO
DATA : 27/11/2020
HORA: 14:00
LOCAL: defesa remota
TÍTULO:

RELATIONSHIP BETWEEN PHYSICAL-CHEMICAL VARIABLES AND PLANKTON ON THE CONTINENTAL PLATFORM OF SALVADOR, BAHIA

PALAVRAS-CHAVES:

dynamics, trophic structure, phytoplankton, zooplankton.

PÁGINAS: 62
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Geociências
SUBÁREA: Geologia
ESPECIALIDADE: Geoquímica
RESUMO:

Understanding the interaction between the plankton and environmental factors is extremely important to understand coastal dynamics. The study area was the Salvador Continental Shelf (SCS), the narrowest continental shelf in Brazil. It is under the influence of the Current of Brazil, which carries the mass of Tropical Water (TW). Moreover, the impact suffered, due to the various uses, can produce consequences in the planktonic dynamics and also in the interaction between the trophic web. Thus, this thesis intends to evaluate the relationship between plankton and oceanographic conditions, as well as the interactions between phytoplankton and copepods. Six bi-monthly cruises (between April 2013 to January 2014) were carried out over four sampling stations. Temperature, salinity and density data were obtained in situ using a CastAway CTD sensor (Conductivity, Temperature and Depth). Water was also sampled, using a Van Dorn type bottle for the analysis of nutrients, dissolved oxygen and phytoplankton. Zooplankton were collected from subsurface trawls, using a 300μm conical net and a coupled flow meter. The pluviometric data were obtained through the INMET database. All collected material was stored and transported to the laboratory for further analysis. A quali-quantitative analysis of phytoplankton and zooplankton was performed using an inverted microscope and magnifying glass, respectively, and identified at the lowest possible taxonomic level following specialized literature. Ecological indexes for phytoplankton and copepods were calculated. Only those species that contributed > 5% of the total abundance of each sample were included in the analyzes. For all data, descriptive statistics, normality tests (Shapiro-Wilk) were calculated, as well as data variability (Kruskal-Wallis). The relationship of physical-chemical parameters on plankton, as well as phytoplankton on copepods, was assessed using redundancy analysis (RDA). The Monte Carlo test (p <0.05) was used to assess the significance from the relationship between environmental factors and planktonic species. This final thesis work is written in the form of a manuscript, with its abstract.

MEMBROS DA BANCA:
Interno - 2134515 - ANA CECILIA RIZZATTI DE ALBERGARIA BARBOSA
Externo à Instituição - CHRISTIANE SAMPAIO DE SOUZA - UFBA
Presidente - 287243 - PAULO DE OLIVEIRA MAFALDA JUNIOR