Recent benthic foraminifera from the Itaipu Lagoon, Rio de Janeiro (southeastern Brazil)

Raposo, Débora; Laut, Vanessa Mattos; Clemente, Iara; Martins, V.; Frontalini, Fabrizio; Silva, Frederico Fonseca da; Lorini, Maria Lúcia; Fortes, Rafael; Laut, Lázaro

doi:10.15560/12.5.1959

Cited by 15 publications

(11 citation statements)

References 27 publications

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“…Foraminiferal species richness commonly documented for coastal lagoons vary between 20 and 30 species (Fatela & Taborda 2002;Laut et al 2007;Raposo et al 2016). The species richness in the Saquarema Lagoonal System (8 species) was lower recorded from other southeastern Brazilian lagoons.…”

Section: Discussionmentioning

confidence: 99%

“…However, these studies were done using the full assemblage (live and dead specimens), which may not represent the totality of the living species, because dead Foraminifera can be transported into lagoons. Raposo et al (2016) was the first to use exclusively record an assemblage of benthic Foraminifera based solely on live specimens and found 35 species in Itaipu Lagoon at Niterói (Rio de Janeiro state).…”

Section: Discussionmentioning

confidence: 99%

“…Several authors have suggested that these species are very resistant to salinity changes and thus are dominant in transitional environments (Boltovskoy 1965;Martins et al 2015;Laut et al 2016a, b;Raposo et al 2016). Ammonia parkinsoniana was also dominant in Maricá Lagoon (Bomfim et al 2010), Rodrigo de Freitas Lagoon (Vilela et al 2011), and Araruama Lagoon (Debenay et al 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Ammonia tepida is commonly encountered in restricted environments under stress of pollution from natural or anthropogenic sources (Vilela et al 2004;Yanko et al 1994Yanko et al , 1999Alve 1995;Culver & Buzas 1995;Sousa et al 1997;Bonetti et al 1997;Debenay et al 2000Debenay et al , 2001; Van der Zwaan 2000; Raposo et al 2016). In Rio de Janeiro state, it was the dominant species in Guanabara Bay and Itaipu Lagoon.…”

Section: Discussionmentioning

confidence: 99%

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Living benthic Foraminifera from the Saquarema lagoonal system (Rio de Janeiro, southeastern Brazil)

Belart¹,

Laut²,

Clemente³

et al. 2017

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Transitional environments such as coastal lagoons with narrow connections to the sea are ecosystems very sensitive to natural or anthropogenic pressures. They are biodiversity hotspots and for this reason it should be studied and preserved. This study lists the benthic Foraminifera species from the Saquarema lagoonal system (SLS), Rio de Janeiro state, Brazil. This complex ecosystem consists of four large connected lagoons, namely Urussanga, Jardim, Boqueirão, and Saquarema. A poorly diversified benthic foraminiferal assemblage was documented from most of the lagoon system and consisted of only eight species belonging to three orders and four families. The relatively low species richness of the SLS compared to other Brazilian coastal lagoons might be explained by several factors including domestic sewage input and the long residence time of water.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Living benthic Foraminifera from the Saquarema lagoonal system (Rio de Janeiro, southeastern Brazil)

Belart¹,

Laut²,

Clemente³

et al. 2017

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“…The species identification was based on several references, such as Loeblich and Tappan (1988), Debenay et al (1998), Semensatto-Jr. and Dias-Brito (2004), Raposo et al (2016), Belart et al (2017) and Alves Martins et al (2019). The species nomenclature was updated following the World Foraminifera Database (Hayward et al, 2017).…”

Section: Foraminiferal Analysismentioning

confidence: 99%

Impact of Eutrophication on Benthic Foraminifera in Sepetiba Bay (Rio De Janeiro State, Se Brazil)

et al. 2019

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The main objective of this work is to analyze the consequences of eutrophication in benthic meiofaunal organisms (foraminifera) in an internal area of Sepetiba Bay (State of Rio de Janeiro, SE, Brazil). This study is interesting because, at the studied site, the sediments corresponding to the period of greatest accumulation of organic matter were not contaminated by metals, although Sepetiba Bay has areas known to be polluted by this type of contaminants. Thus, in this study, it was possible to consider only the impact caused by eutrophication.In the SP6 core, collected in the Sepetiba Bay internal area and studied in this work, textural, geochemical (concentration of chemical elements; 210Pb and 137Cs; radiocarbon data) and foraminifera were analyzed in a muddy section, with a few intercalations of sandy layers. The sediments of the analyzed section were deposited in the last ≈2,350 BP years. The concentrations of Al, Cd, Co, Fe, Mn, Ni, Pb, Sn, Ti, V and Zn are higher at the base of the core and decrease towards the top. The contents of TOC, P and Zr have inverse paterns. The ratios of these elements to their background value have similar patterns. However, previous studies have recognized that during the twentieth century Cd, Zn, Cr and Pb concentrations increased in several areas of Sepetiba Bay, mainly due to industrial activity. The area where this core was collected may have been dredged. Radiocarbon ages suggest a loss of ≈2000 years of sedimentary registration, marked by an unconformity at a depth of 126 cm, probably caused by dredging. A new sedimentary sequence unpolluted by metals but highly enriched in organic matter was deposited on the surface of that discontinuity. Foraminifera were quite abundants in the lower section (240-126 cm; between ≈2,400-2,090 years BP, execept in the sandy layers), corresponding to sediment deposition before dredging. After dredging, the accumulation of very fine-grained sediments rich in organic matter generated eutrophication phenomena, which caused a drastic reduction in the abundance and diversity of these organisms. This work testifies the effect of eutrophication on meiofaunal organisms. Although some coastal foraminifer species tolerate harmful effects caused by eutrophication, it is recognized that the impact has been so negative that even these species occur with reduced abundance in the study area. IMPACTO DA EUTROFICAÇÃO EM FORAMINIFEROS BÊNTONICOS NA BAÍA DE SEPETIBA (ESTADO DO RIO DE JANEIRO, SE BRASIL) ResumoO principal objetivo deste trabalho é analisar as conseqüências da eutrofização em organismos meiofaunais bentônicos (foraminíferos) em uma área interna da Baía de Sepetiba (Estado do Rio de Janeiro, SE, Brasil). Este estudo é interessante porque, no local estudado, os sedimentos correspondentes ao período de maior acumulação de matéria orgânica, não estavam contaminados por metais, apesar da Baía de Sepetiba ter áreas reconhecidamente poluídas por este tipo de contaminantes. Assim neste estudo foi possível considerar apenas o impacto causado pela eutrofização.No testemunho SP6, coletado na área interna da Baía de Sepetiba e estudado neste trabalho, foram analisados dados texturais, geoquímicos (concentração de elementos químicos; 210Pb e 137Cs; dados de radiocarbono) e foraminíferos numa secção lamosa, com intercalações de camadas arenosas.Os sedimentos da seção analisada foram depositados nos últimos 2.350 anos BP. As concentrações de Al, Cd, Co, Fe, Mn, Ni, Pb, Sn, Ti, V e Zn são mais elevadas na base do testemunho e diminuem em direção ao topo. O conteúdo de TOC, P e Zr possui padrões inversos. As razões destes elementos com o respectivo valor de fundo possuem padrões semelhantes. Porém, estudos anteriores reconheceram em várias áreas da Baía de Sepetiba um aumento das concentrações de Cd, Zn, Cr e Pb durante o século XX, principalmente devido à atividade industrial. A área onde foi coletado este testemunho poderá ter sido dragada. As idades de radiocarbono sugerem uma perda de aproximadamente 2000 anos de registro sedimentar, marcada por uma inconformidade a 126 cm de profundidade, causada provavelmente por dragagem. Uma nova sequência sedimentar não poluída por metais, mas bastante enriquecida em matéria orgânica foi depositada sobre a superfície da descontinuidade. Os foraminíferos eram relativamente abundantes na seção inferior (240-126 cm; entre ≈2.400-2.090 anos BP), correspondente á deposição de sedimentos antes da dragagem. Após a dragagem, a acumulação de sedimentos muito finos e ricos em matéria orgânica, gerou fenómenos de eutrofização, que terão causado uma redução drástica da abundância e diversidade destes organismos. Este trabalho testemunha o efeito da eutrofização em organismos meiofaunais. Apesar de algumas espécies de foraminíferos costeiros tolerarem efeitos nefastos causados pela eutrofização, reconhece-se que o impacto foi tão negativo que mesmo estas espécies ocorrem com abundância reduzida na área estudada. Palavras-chave: Área Costeira. Registro Paleoambiental. Impacto Antrópico. Meiofauna, Abordagem Multiproxy.

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Disentangling natural vs. anthropogenic induced environmental variability during the Holocene: Marambaia Cove, SW sector of the Sepetiba Bay (SE Brazil)

Castelo

Martins

Martínez-Colón

et al. 2021

Environ Sci Pollut Res

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Recent benthic foraminifera from the Itaipu Lagoon, Rio de Janeiro (southeastern Brazil)

Cited by 15 publications

References 27 publications

Living benthic Foraminifera from the Saquarema lagoonal system (Rio de Janeiro, southeastern Brazil)

Living benthic Foraminifera from the Saquarema lagoonal system (Rio de Janeiro, southeastern Brazil)

Impact of Eutrophication on Benthic Foraminifera in Sepetiba Bay (Rio De Janeiro State, Se Brazil)

Disentangling natural vs. anthropogenic induced environmental variability during the Holocene: Marambaia Cove, SW sector of the Sepetiba Bay (SE Brazil)

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