Proposta De Compartimentação Em Mesoescala Para O Litoral Do Nordeste Brasileiro

Oliveira, George Pereira de

doi:10.20502/rbg.v17i3.844

Cited by 15 publications

(15 citation statements)

References 8 publications

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“…The sampling was realized in the framework of the expeditions TAXPOMOL/2016 and Maranhão/2017 in the unexplored part of the northern coast of the north-east region of Brazil, which is named the Brazilian Semi-Arid Coast (Diniz & Oliveira, 2016). All samples were collected in the intertidal zone, on sandy beaches, with rocky tide pools, from the states of Maranhão and Ceará (Figure 1).…”

Section: Methodsmentioning

confidence: 99%

Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

2020

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The Order Suberitida is defined as a group of marine sponges without an obvious cortex, a skeleton devoid of microscleres, and with a deletion of a small loop of 15 base pairs in the secondary structure of the 28S rDNA as a molecular synapomorphy. Suberitida comprises three families and 26 genera distributed worldwide, but mostly in temperate and polar waters. Twenty species were reported along the entire Brazilian coast, and although the north-eastern coast of Brazil seems to harbour a rich sponge fauna, our current knowledge is concentrated along the south-eastern Atlantic coast. A survey was implemented along the northern coast of Brazil, and the collection allowed the identification of six species belonging to the Order Suberitida. Two of them are considered new to science: Suberites purpura sp. nov., Hymeniacidon upaonassu sp. nov., and four, Halichondria (Halichondria) marianae Santos, Nascimento & Pinheiro, 2018, Halichondria (H.) melanadocia de Laubenfels, 1936, Suberites aurantiacus (Duchassaing & Michelotti, 1864), and Terpios fugax Duchassaing & Michelotti, 1864, are re-described. Taxonomic comparisons are made for Tropical Western Atlantic species and type species of the four genera. Finally, an identification key for the Western Atlantic Suberites species is provided.

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Section: Methodsmentioning

confidence: 99%

Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

2020

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“…Oliveira, 2016), with average height of 1 m and maximum height of 2 m (Frazão and Amaro, 2016). The water depth in the area located seaward from the studied morphology is up to 20 m within a range of 15 km from the coast (Diniz and Oliveira, 2016).…”

Section: Physiography and Geological Frameworkmentioning

confidence: 91%

“…Martin et al, 1993). The local winds come from NE, SE and E directions, with annual speed ranging from 3 to 6 m/s (Diniz and Oliveira, 2016;Frazão and Amaro, 2016). The waves move preferentially in the ESE direction, reaching the coast at right angles (Diniz and Rossetti et al, 2012).…”

Section: Physiography and Geological Frameworkmentioning

confidence: 99%

Late Holocene coastal dynamics and relative sea-level changes in the littoral of Paraíba, northeastern Brazil

Alves

Rossetti

2017

Progress in Physical Geography: Earth and Environment

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A preliminary analysis of a segment of the Paraíba littoral in northeastern Brazil revealed a prograding shoreline in a coast currently characterized by estuarine transgressive depositional systems. Detailed study of coastal geomorphology is of relevance to reconstruct the sea-level history in this shoreline. Such investigation can help improve the record of past sea-level curves of northeastern Brazil, an issue still open to debates. In this work, we explored remote sensing imagery for the geomorphological characterization of this prograding shoreline and combined this information with geological field data aiming to establish the various phases of shoreline progradation. In addition, we also analyzed the potential forcing factors responsible for the morphological changes in the eastern section of the littoral of Paraíba during the late Holocene, comparing changes with other prograding shorelines along the east coast of Brazil. Geomorphological interpretation was based on the analysis of Phased Array type L-band Synthetic Aperture Radar (PALSAR) images acquired aboard the Advanced Land Observing Satellite 1 (ALOS-1). Geological data comprised dating of sand samples by the optically stimulated luminescence (OSL) technique for the establishment of the chronological context. The coastal deposits are represented by a cuspate morphology and numerous internal beach ridges that prograded seaward from a roughly north–south trending palaeocliff. The chronological data indicate shoreline progradation during the past 2.1 ± 0.1 ka, after the mid-Holocene sea-level fall. Several prograding episodes occurred during this time, some not matching with proposed sea-level rises punctuated upon the overall fall. Together with the regional geological context of the study area, we propose that eustatic sea-level was not the only factor triggering coastal progradation in this region.

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“…Por conseguinte, foram definidas as unidades morfoesculturais, como segundo nível taxonômico, e as subunidades morfoesculturais, no terceiro nível, sendo este último nível, delimitado com base em Diniz et al (2016). Por fim tornou-se possível delimitar os modelados, que compões o quarto nível taxonômico.…”

Section: Procedimento Metodológicosunclassified

Geomorphological Mapping of the Seridó Region, Rio Grande Do Norte State/Mapeamento Geomorfológico Da Região Do Seridó, Estado Do Rio Grande Do Norte

Vital¹,

Santos²,

Santos³

2021

WMD

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O mapeamento geomorfológico do Seridó é necessário devido à escassez de produtos dessa natureza, assim como, também, é importante para fins de planejamento e ordenamento territorial, haja vista que a região analisada apresenta cidades em fase de expansão, como, por exemplo, Caicó e Currais Novos. Este trabalho objetivou realizar um mapeamento geomorfológico da Região do Seridó, Estado do Rio Grande do Norte, até o 4º táxon, na escala de 1:100.000. A base de dados utilizada para o mapeamento foi obtida do SRTM (Shuttle Radar Topographic Mission), com resolução espacial de 30 m, onde foram obtidas curvas de nível, sombreamento do relevo, declividade e hipsometria, além de imagens do satélite LANDSAT 8, para distinção de fisionomias. A partir de então, foi possível distinguir as unidades morfoestruturais e morfoesculturais, além de subunidades morfoesculturais e modelados. Os referidos dados servirão de base para o planejamento e gestão ambiental da área de estudo, uma vez que constituem preciosas informações da geodiversidade regional.

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Proposta De Compartimentação Em Mesoescala Para O Litoral Do Nordeste Brasileiro

Cited by 15 publications

References 8 publications

Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

Morphological description of six species of Suberitida (Porifera: Demospongiae) from the unexplored north-eastern coast of Brazil, with emphasis on two new species

Late Holocene coastal dynamics and relative sea-level changes in the littoral of Paraíba, northeastern Brazil

Geomorphological Mapping of the Seridó Region, Rio Grande Do Norte State/Mapeamento Geomorfológico Da Região Do Seridó, Estado Do Rio Grande Do Norte

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