Mestrado em Oceanografia Ambiental

URI Permanente para esta coleção

http://repositorio.ufes.br/handle/10/17532

Nível: Mestrado Acadêmico
Ano de início: 2007
Conceito atual na CAPES: 4
Ato normativo: Homologado pelo CNE(Portaria MEC Nº 609 de 14/03/2019) Publicação no DOU em 18/03/2019 Seç. 1, Pág. 63. Parecer CNE/CES nº 487/2018, Processo no 23001.000335/2018-51).
Periodicidade de seleção: Anual
Área(s) de concentração: Sistemas Costeiros e Marinhos
Url do curso: https://oceanografia.ufes.br/pt-br/pos-graduacao/PPGOA/detalhes-do-curso?id=1468

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Navegando Mestrado em Oceanografia Ambiental por Autor "Amado Filho, Gilberto Menezes"

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    Registro geológico holocênico de recifes submersos na plataforma de Abrolhos
    (Universidade Federal do Espírito Santo, 2015-05-28) Vieira, Laura Silveira; Webster, Jody; Bastos, Alex Cardoso; Moura, Rodrigo Leão de; Amado Filho, Gilberto Menezes
    Coral Reef systems are common features throughout many modern tropical coastal zone and the evidence of their occurrence during different sea levels have been studied worldwide. The Abrolhos Shelf (Brazil) encompasses the most important coral reef system in the South Atlantic showing high levels of endemism, low diversity and unique growth (locally known as “chapeirões”). The reef system along the shelf is characterized by shallow reef arcs parallel to the coast, and “give-up” reefs throughout the north-central and southern shelf. The main objective of this study is to investigate the geological record showing the Late Holocene evolution of two submerged pinnacles in the Abrolhos Shelf. Herein, two submerged pinnacles were drilledwith their tops at 4 and 15 m below sea level, called "Shallow Water Reef" (SW) and "Deep Water Reef" (DW). A total of eight cores were collected. Vertical (top down) and horizontal (perpendicular to the pinnacle wall) cores were recovered, ranging from 0.70 to 2.03 m in length. Significant coralgal framework was observed in the cores (corals such species as Mussismilia harttii., Millepora sp., Siderastrea sp., Porites sp., Favia sp. and Madracis sp.; and coralline algae such species as Hydrolithon sp., Lithophyllum kotschyanum, Lithophyllum sp., Amphiroa sp., Mesophyllum erubescens and Sporolithon episporum). However, we found that by far the most abundant framebuilding component were Schizoporellidae bryozoans. Extensive encrusting bryozoans were identified in all cores comprising between 15 - 52,9% of 2D areas. Bryozoans were most representative in the "DW" cores. Paradoxically, the poor spatial competition of encrusting bryozoans must be the explanation for the bryozoan dominance in the "DW" cores, which hermatypic corals can not develop. Radiocarbon dates indicate that the "DW" reef is older than the "SW" reef as well as higher reef accumulation rates occur in the past thousand years is in the "SW" reef. The results show that the both reefs have been developed in a shallow shelf environment (<30 meters depth)
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    Sedimentação da plataforma continental do Espírito Santo : do aporte terrígeno à ocorrência de fundos recifais
    (Universidade Federal do Espírito Santo, 2017-02-24) Vieira, Fernanda Vedoato; Bastos, Alex Cardoso; Baptista Neto, José Antônio; Amado Filho, Gilberto Menezes
    Short and long term processes, such as biological activity, sediment transport, hydrodynamic conditions, relative sea level variation, sedimentary input and pre-existing geology, determine the continental shelf morphology. The study area of this research is the continental shelf of the Brazilian east coast. Its platform presents a variation in its width, being of 240 km in the region of Abrolhos to 50 km in its remainder, accompanied by two distinct sedimentary regimes along the platform, the accommodation and supply regime. Associated with those factors, the coastal region is characterized by the presence of Barrier Formation Traps, Crystalline Basement and Quaternary Coastal Plains. These units are distributed in different forms along the coast. The acquired data had the objective to investigate how the long term processes influence the occurrence and distribution of the heterogeneous funds along the platform. The results showed four different reef structures, isolated type 1 and 2 reefs, concretions / crusts, paleovalleys bioconstructions, and an extensive rhodoliths funds throughout the study area. Mud deposits were restricted to the mouth of the Doce river, extending toward the north of the platform. The remainder of the platform is composed of carbonate sediments and terrigenous sand to the north. In the region southern of the Doce river the platform presented a carbonate domain with significant changes in its morphology, with the presence of paleovalleys, irregular structures associated with hardbottoms. For the region to the north, the platform presents a more homogenous morphology, with the presence of the delta of the Doce river and a widening of the platform in the region of Abrolhos. Thus, the geomorphology evolution of the platform was related to the long term processes, and these processes differentiated the faciology of the platform.