Environmental controls on the distribution of living (stained) benthic foraminifera on the continental slope in the Campos Basin area (SW Atlantic)

2018 ◽  
Vol 181 ◽  
pp. 37-52 ◽  
Author(s):  
Cintia Yamashita ◽  
Silvia Helena de Mello e Sousa ◽  
Thaisa Marques Vicente ◽  
Maria Virgínia Martins ◽  
Renata Hanae Nagai ◽  
...  
Keyword(s):  
Continental Slope ◽  
Benthic Foraminifera ◽  
Environmental Controls ◽  
Campos Basin ◽  
Sw Atlantic ◽  
Basin Area

scholarly journals Living Benthic Foraminifera from the Surface and Subsurface Sediment Layers Applied to the Environmental Characterization of the Brazilian Continental Slope (SW Atlantic)

Water ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 1863
Author(s):  
Luciana Cristina de Carvalho Santa-Rosa ◽  
Sibelle Trevisan Disaró ◽  
Violeta Totah ◽  
Silvia Watanabe ◽  
Ana Tereza Bittencourt Guimarães
Keyword(s):  
Continental Slope ◽  
Benthic Foraminifera ◽  
Subsurface Layer ◽  
Environmental Characterization ◽  
Potiguar Basin ◽  
Middle Slope ◽  
Sw Atlantic ◽  
Sediment Layers ◽  
Lower Slope

Living benthic foraminifera (>63 µm) were studied to characterize the continental slope of the Potiguar Basin (SW Atlantic). Foraminifers from the surface (0–2 cm), subsurface (2–5 cm), and integrated (0–5 cm) sediment layers were analyzed to verify their contribution to environmental characterization. It was also estimated if and which changes occur when the subsurface is added. Sampling stations were distributed in five transects in four isobaths (150, 400, 1000, and 2000 m). Sediment samples were fixed with 4% buffered formaldehyde and stained with Bengal rose. Were recorded 396 species in the surface layer, 228 in the subsurface, and 449 in integrating both layers. This study did not include tubular agglutinated species. The assemblages from 150 m isobath indicated the upper slope, from 400 m indicated the middle slope and the ones from the 2000 m indicated the lower slope. The surface layer’s assemblage at 1000 m isobath was more similar to the middle slope; in contrast, its subsurface layer´s assemblage had more similarity with the lower slope. Rarefaction curves, Permanova, and NMDS routines indicated a high resemblance between surface and integrated layers. Therefore, the first two centimeters were sufficient to characterize this region based on living benthic foraminifera.

Upper slope sands: Late Quaternary shallow-water sandy contourities of Campos Basin, SW Atlantic Margin

2002 ◽  
Vol 22 (1) ◽  
pp. 261-270 ◽  
Author(s):  
Adriano R. Viana ◽  
Waldemar De Almeida ◽  
Cleide Wilhelm De Almeida
Keyword(s):  
Shallow Water ◽  
Late Quaternary ◽  
Campos Basin ◽  
Sw Atlantic ◽  
Atlantic Margin ◽  
Upper Slope

Four new species of Sabatieria Rouville, 1903 (Nematoda, Comesomatidae) from the Continental Slope of Atlantic Southeast

Zootaxa ◽  
2007 ◽  
Vol 1402 (1) ◽  
pp. 39 ◽  
Author(s):  
ALESSANDRA PRATES BOTELHO ◽  
MARIA CRISTINA DA SILVA ◽  
ANDRÉ MORGADO ESTEVES ◽  
VERÔNICA FONSÊCA-GENEVOIS
Keyword(s):  
New Species ◽  
Continental Slope ◽  
Rio De Janeiro ◽  
Distal Part ◽  
Maximum Diameter ◽  
Campos Basin ◽  
Tail Shape ◽  
Abundant Genus

Sabatieria is the most abundant genus along the Campos Basin, Rio de Janeiro (Brazil). Four new species of Sabatieria (Nematoda-Comesomatidae) from the Continental Slope of Atlantic Southeast are described. Sabatieria spiculata sp.nov. is characterized by the size of spicule and the presence of dorsal tooth ; S. paraspiculata sp. nov. by tail shape and the maximum diameter; S. bitumen sp. nov. by spicule shape with an arrow-like distal part and the S. subrotundicauda sp.nov. by a round tail and reflected ovary.

Taxonomy ofCladorhizain the deep SW Atlantic:C. nicoleaesp. nov. and redescription ofC. inversa(Cladorhizidae, Poecilosclerida, Demospongiae)

2015 ◽  
Vol 96 (2) ◽  
pp. 297-303
Author(s):  
Cristiana Castello-Branco ◽  
Jon Thomassen Hestetun ◽  
Hans Tore Rapp ◽  
Eduardo Hajdu
Keyword(s):  
New Species ◽  
Continental Slope ◽  
The Body ◽  
Shaped Body ◽  
Se Brazil ◽  
Sw Atlantic ◽  
A New Species

Until now only two species ofCladorhizahave been reported from the SW Atlantic, namelyC. diminutaandC. inversa, despite a total of 39 species reported from various parts of the globe. Here we describe a new species,C. nicoleaesp. nov., dredged from 750 m depth on the continental slope off SE Brazil during the French RV ‘Marion Dufresne’ expedition in 1987. It is an erect, pedunculated and club-shaped sponge, 26 mm high and with 12 radially arranged whip-like projections (each up to 3 mm long). The new species differs from its closest relative,C. inversa(redescribed here), by its possession of sigmas and sigmancistras. The holotype ofCladorhiza inversais also a pedunculated sponge, 1.9 cm tall, with a cup-shaped body with an apical spur-like continuation of the stem and a crown of 16 projections (up to 8 mm long) radiating from the rim of the body.

scholarly journals Mid-lower bathyal benthic foraminifera of the Campos Basin, southeastern Brazilian margin: biotopes and controlling ecological factors

2006 ◽  
Vol 29 (1) ◽  
pp. 571-572
Author(s):  
Silvia Helena de Mello e Sousa ◽  
Raquel Fernanda Passos ◽  
Marina Fukumoto ◽  
Ilson Carlos Almeida da Silveira ◽  
Rubens Cesar Lopes Figueira ◽  
...  
Keyword(s):  
Benthic Foraminifera ◽  
Ecological Factors ◽  
Campos Basin

scholarly journals New records of Tindariopsis (Pelecypoda, Protobranchia) from Brazil - Campos Basin (off Rio de Janeiro)

2011 ◽  
Vol 11 (3) ◽  
pp. 423-429
Author(s):  
Natalia Pereira Benaim ◽  
Ricardo Silva Absalão
Keyword(s):  
Atlantic Ocean ◽  
Continental Slope ◽  
Type Species ◽  
New Records ◽  
First Record ◽  
Brazilian Coast ◽  
Surface Sculpture ◽  
Campos Basin ◽  
The Caribbean

As a part of the Environmental Characterization of the Campos Basin project, we obtained samples from the continental slope benthos. As a consequence, specimens of Tindariopsis aeolata (Dall, 1889) and Tindariopsis agathida (Dall, 1889) were found. These species show prodissoconch surface sculpture patterns that were never seen for species of Tindariopsis. The presence of this kind of sculpture in the type species of the genus, T. agathida, adds diagnostic characters to the genus. T. agathida and T. aeolata are typical from the Caribbean Realm (Guyana and Tobago). This is the first record of T. aeolata in the southernmost area of the Atlantic Ocean, and also the shallowest record (1000 m) for this species. With this finding of specimens from the Bacia de Campos, the distribution of T. agathida can now be extended in the Brazilian coast from 7º to 22º S.

Sign in / Sign up

Export Citation Format

Share Document