Organically enriched sediments and foraminiferal species from the Açu Reef, indicators of upwelling in NE Brazil?

Eichler, Patrícia Pinheiro Beck; Silva, Luzia Liniane do Nascimento; Andrade, Allany Uchoa de; Martins, Janiheryson Felipe de Oliveira; Farias, Catharinne Angélica Carvalho de; Moura, D. S.; Amorim, Audrey; Marinho, L. F. L. P.; Vital, Helenice; Gomes, Moab Praxedes

doi:10.1016/j.margeo.2019.106016

Cited by 11 publications

(3 citation statements)

References 37 publications

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“…In the South Atlantic, this species lives on the continental shelf up the east coast of Argentina, Uruguay and Brazil under the influence of the cold, southern-sourced Malvinas Current (Boltovskoy et al 1980;Eichler et al 2019).…”

Section: Ecological Distributionmentioning

confidence: 99%

Taxonomy and biogeography of living species of the Family Notorotaliidae (Notorotalia, Parrellina, Porosorotalia, Buccella, Cristatavultus)

Hayward¹,

Holzmann²,

Pawlowski³

et al. 2023

mpal

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DNA sequencing shows that species of the genera Notorotalia, Porosorotalia and Buccella form a distinct branch (Notorotaliidae) of Rotaloidea, and cluster as sister to Elphidiidae. In this review we report on the sequencing of three species of Buccella (from the Arctic Ocean, Patagonia and Chile) and one each of Notorotalia (New Zealand) and Porosorotalia (Chile). This information has been combined with all the morphological descriptive information on species of these genera plus the genera Cristatavultus and Parrellina to provide a global synthesis of living species of the Notorotaliidae. We recognize 11 species of the southern hemisphere genus Notorotalia, which has a centre of diversity around New Zealand (8 species). A second southern-hemisphere-restricted genus, restricted to eastern Australia is Parrellina (3 species) although specimens (possibly introduced) have been recorded from the Mediterranean Sea. Cristatavultus has a single species, with a tropical west Pacific distribution.We synonymize Cribrorotalia under Porosorotalia, which has a disjunct distribution with one species in the northwest Pacific and a second around the southern parts of South America. Buccella is the most diverse and widespread genus (16 species recognized) with its greatest abundance in the Arctic Ocean and around subantarctic-temperate South America. Five species of Buccella live in a belt along the west coast of central America, from USA to Peru, with some spillage into the Caribbean Sea and Gulf of Mexico. Two new species of Buccella are recognized: B. dejardini (from South Georgia) and Buccella n. sp. A (from Chile).

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Section: Ecological Distributionmentioning

confidence: 99%

Taxonomy and biogeography of living species of the Family Notorotaliidae (Notorotalia, Parrellina, Porosorotalia, Buccella, Cristatavultus)

Hayward¹,

Holzmann²,

Pawlowski³

et al. 2023

mpal

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“…However, chemical processes are mainly responsible for maintenance and variability of biological assemblages' distribution in submarine canyons where the nutrient exchanges are bigger than abyssal regions (Yamashita et al, 2018). Eichler et al (2019;Figure 5T), have shown habitat preferences associated with different foraminiferal species in newly discovered environmental conditions and their potential to indicate paleo-upwelling and other environmental conditions. Bernardino et al (2019;Figure 5N), have suggested that even with similar higher taxa composition, submarine canyons of E-SE Brazil host distinct assemblages individually and between canyon-slope habitats.…”

Section: Knowledge Of Biological Communitiesmentioning

confidence: 99%

The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

Silva¹,

Araújo²

2021

Front. Mar. Sci.

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Submarine canyons have a relevant role in marine ecosystems. They are responsible for oceanographic conditions such as variability of temperature and salinity, sediment transport, nutrients, and even pollutants amongst marine areas. Submarine canyon studies have been growing and reaching prominence due to their importance in the Blue Economy. Initiatives to promote sustainable development for the ocean have been discussed in the Ocean Decade. Although canyons studies are increasing, how can we integrate these with the Ocean Decade outcomes? Thus, we aim to demonstrate an overview of the advances of submarine canyons studies and their link to the Ocean Decade for South America. We analyzed 160 studies divided into spatiotemporal analysis and study approaches according to the Ocean Decade outcomes. We discuss these articles, building a timeline and argumentative topics considering the advances, and discuss gaps to predict the future of submarine canyons studies in the Ocean Decade and Blue Economy context.

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“…A plataforma é constituída por sedimentos carbonáticos, siliciclásticos e mistos (Vital et al, 2005(Vital et al, , 2008Gomes et al, 2015;. A distribuição de sedimentos e a formação das diversas geomorfologias em diferentes escalas indicam processos morfo-sedimentares durante os últimos eventos de regressão e transgressão marinha (Bezerra et al, 2003;Caldas et al, 2006;Stattegger et al, 2006;Boski et al, 2015) e modificados por processos físicos, biológicos e sedimentares atuais (Gomes et al, 2016;Eichler et al, 2017;Barbosa et al, 2018;Ribeiro et al, 2018;Eichler et al, 2019;Gomes et al, 2019;Rovira et al, 2019). Feições com expressão morfológica em diferentes escalas distribuemse ao largo dos compartimentos da plataforma (Vital et al, 2010a;Gomes et al, 2014), como dunas gigantes longitudinais (Nascimento Neto et al, 2019), dunas de menores escalas (Pereira et al, 2019) na plataforma interna, vales incisos e cânions submarinos (Vital et al, 2010b;Almeida et al, 2015;Gomes et al, 2015Gomes et al, & 2016, recifes bioconstruídos (Nascimento e beachrocks afogados (Cabral Neto et al, 2013).…”

Section: Características Gerais Da áReaunclassified

Imageamento Acústico da Plataforma Interna Adjacente à Praia de Ponta Negra - RN

2021

Self Cite

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ResumoProcessos erosivos na praia de Ponta Negra em Natal (RN), têm sido relacionados ao baixo suprimento de sedimentos terrígenos e ao substrato predominantemente carbonático que favorecem as condições de plataforma faminta. Neste trabalho o mapeamento de padrões e feições do substrato marinho foi aplicado a análise da dinâmica sedimentar costeira-plataformal. Utilizou-se um mosaico de imagens acústicas adquiridas por um sistema de varredura multifeixe numa área de 31 km² entre as profundidades de 10 e 14 m. O processamento dos dados hidroacústicos consistiu na aplicação de filtros, ganhos e correções geométricas. Adicionalmente, foram processadas imagens LANDSAT 8 com correção atmosférica, composição de bandas e realce de histogramas. Foram reconhecidos dois padrões acústicos, um homogêneo e outro heterogêneo, distribuídos em quatro níveis de intensidade acústica associados às diferenças texturais dos sedimentos de fundo. As feições morfológicas observadas nas imagens acústicas são em geral associadas as dunas transversais ao fluxo com espaçamento variando entre 0,6 e 100 m. A imagem LANDSAT 8 ETM+ revelou a presença de sand ribbons paralelas a costa com comprimento de onda entre 500 m e 710 m, sobrepostas por dunas transversais observadas nos padrões acústicos. As dimensões das dunas transversais indicam que o suprimento sedimentar na área é baixo, implicando no baixo desenvolvimento da altura dessas feições. Embora haja diversidade nas características da plataforma leste e norte do RN, os regimes hidrodinâmicos produzem feições semelhantes associadas aos processos erosivos costeiros adjacentes.

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Organically enriched sediments and foraminiferal species from the Açu Reef, indicators of upwelling in NE Brazil?

Cited by 11 publications

References 37 publications

Taxonomy and biogeography of living species of the Family Notorotaliidae (Notorotalia, Parrellina, Porosorotalia, Buccella, Cristatavultus)

Taxonomy and biogeography of living species of the Family Notorotaliidae (Notorotalia, Parrellina, Porosorotalia, Buccella, Cristatavultus)

The South American Advances in Submarine Canyons Studies and Their Link to the Ocean Decade

Imageamento Acústico da Plataforma Interna Adjacente à Praia de Ponta Negra - RN

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