Description, distribution and ecology of living Reophax pyriformis n. sp. (Campos Basin, South Atlantic Ocean)

Author(s)

Yamashita, Cintia ^[1] ; de Mello e Sousa, Silvia Helena ^[1] ; Kaminski, Michael A. ^[2] ; Alves Martins, Maria Virginia ^{[3, 4]} ; Leao Elmadjian, Carlos Eduardo ^[5] ; Nagai, Renata Hanae ^[6] ; Yamamoto, Naira Tiemi ^[1] ; Machado Koutsoukos, Eduardo Apostolos ^[7] ; Lopes Figueira, Rubens Cesar ^[1]

Affiliation

^[1] Univ Sao Paulo, Inst Oceanog, Praca Oceanog 191, Cidade Univ, BR-05508120 Sao Paulo, SP - Brazil

^[2] King Fahd Univ Petr & Minerals, Geosci Dept, POB 701, Dhahran 31261 - Saudi Arabia

^[3] Univ Estado Rio de Janeiro, Fac Geol, Dept Estratig & Paleontol, Av Sao Francisco Xavier 524, Sala 2020A, BR-20550013 Rio De Janeiro, RJ - Brazil

^[4] Univ Aveiro, Dept Geociencias, GeoBioTec, Campus Santiago, P-3810193 Aveiro - Portugal

^[5] Univ Sao Paulo, Inst Matemat & Estat, Rua Matao, 1010, Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil

^[6] Univ Fed Parana, Ctr Estudos Mar, AV Beira Mar S-N, BR-83255000 Pontal Do Parana, Parana - Brazil

^[7] Heidelberg Univ, Inst Geowissensch, Neuenheimer Feld 234, D-69120 Heidelberg - Germany

• Document type: Journal article
• Source: REVUE DE MICROPALEONTOLOGIE; v. 64, SEP 2019.
• Web of Science Citations: 0

Abstract

The distribution of living (rose Bengal stained) Reophax pyriformis Yamashita, Sousa and Kaminski, n. sp., an agglutinated benthic foraminiferal species, was analyzed in the area of the Campos Basin (southeastern Brazilian continental margin). The study is based on 34 oceanographic stations (54 samples), located between 400 m and 3000 m water depth. The distribution of living R. pyriformis n.sp. density is compared to sedimentological parameters, such as total organic carbon, total nitrogen, calcium carbonate, phytopigment, lipids biomarkers (sterols, fatty acids and n-alcohols), total lipids, and bacterial biomass, as well as the particulate organic matter flux to the seafloor. This species was found in the range of 1000-1200 m water depth, with an average living depth of 1.52 cm in the sediment. The distribution of this species seems to be related to lipid biomarkers (allochthone and/or continental derivative, zooplankton and/or fauna, phytoplankton or primary producers) and total organic carbon under the influence of Intermediate Western Boundary Current conditions. (C) 2019 Elsevier Masson SAS. All rights reserved. (AU)

• FAPESP's process: 17/00427-5 - Living benthic foraminifera vertical distribution at mud-belts in the southwestern margin of the South Atlantic Ocean: faunal response to redox condition and organic matter input.
• Grantee: Cintia Yamashita
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/12510-3 - Evaluation of the ocean productivity in the slope of the campos Basin,southeastern Brazilian continental margin: an approach from benthic foraminifera and stable isotopes
• Grantee: Silvia Helena de Mello e Sousa
• Support Opportunities: Regular Research Grants