Seasonal Dynamics of Benthic Foraminiferal Biocoenosis in the Tropical Saquarema Lagoonal System (Brazil)

Belart, Pierre; Habib, Renan; Raposo, Débora; Clemente, Iara; Martins, Maria Virgínia Alves; Frontalini, Fabrizio; Figueiredo, Marcos de Souza Lima; Lorini, Maria Lúcia; Laut, Lázaro

doi:10.1007/s12237-018-00514-w

Cited by 15 publications

(5 citation statements)

References 59 publications

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“…In this station, it was found the presence of 18 species and the highest value of species richness in July and December (with 7 species/sample) and its higher richness species could be notice by the low similarity among the samples of the cluster groups (22%) showing a richer diversity of foraminifera than other portions of the channel, with epifaunal and infaunal species, as found in Ubatuba Bay, a marine environment (Burone and Pires-Vanin 2006). Even with the high freshwater discharge of the Itapanhaú River (Eichler et al 2007, Passos et al 2017, this station showed the occurrence of calcareous hyaline and porcelaneous species such as A. tepida and Quinqueloculina patagonica, and also the presence of Pararotalia sarminetoi which is related to marine The porcelaneous genus Quinqueloculina is also associated with normal to hypersaline marine salinities, high water clarity and good circulation (Ishman et al 1997;Debenay et al 2001;Eichler et al 2007;Raposo et al 2018;Belart et al 2019). The higher frequency of aerobic marine conditions (C/S > 5) at this station confirm the intense marine water exchange.…”

Section: Discussionmentioning

confidence: 87%

Living benthic foraminiferal assemblages monitored monthly in a tide-dominated estuary, Bertioga Channel, Brazil

Rodrigues

Oliveira

Eichler

2020

J. Sediment. Environ.

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Monitoring studies to characterize coastal environments and/or describe the direct impact of pollutants on foraminiferal fauna must be based on the living assemblages. The aim of this study is to review a benthic foraminifera dataset of a bio-monitoring work performed in Bertioga Channel region (São Paulo State) from April of 1999 until March of 2000 by following some of the FOBIMO recommendations. The Bertioga Channel is an estuarine system dominated by tide which may influence the foraminifera fauna. Six distinct stations were selected and sampled monthly during a year. To the faunal analysis, a fixed volume of sediment (50 cm 3 ) was washed through a sieve with 63 µm openings. The foraminifer specimens were picked up and identified. The living fauna showed that Ammonia tepida and Cribroelphidium spp. were the most frequent taxa in almost all stations and during all the monitoring study. Agglutinated species such as Arenoparrella mexicana and Haplophragmoides wilberti were found mainly in the inner portions of the channel. Typical species of marine and paralic environments such as Pararotalia cananeiaensis and Pseudononion japonicumj were found in both entrances of the channel. The living foraminifera abundance and species richness are related to the circulation patterns in this estuarine system with occurrence of opportunistic species near the its entrance closer to impacted areas (Santos Channel), eurihaline in the eastern entrance and mixohaline species in the inner portions of it.

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Section: Discussionmentioning

confidence: 87%

Living benthic foraminiferal assemblages monitored monthly in a tide-dominated estuary, Bertioga Channel, Brazil

Rodrigues

Oliveira

Eichler

2020

J. Sediment. Environ.

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“…9, 10; appendix 3) are commonly found in living assemblages of Brazilian coastal shallow waters (e.g. Delavy et al, 2016;Martins et al, 2016 a, b;Raposo et al, 2016Raposo et al, , 2018Belart et al, 2017Belart et al, , 2019Duleba et al, 2018). However, in the lower sedimentary layers (240-229 cm), in addition to a relatively high foraminiferal density and slight increase of diversity, the presence of Ammonia parkinsoniana, bolivinids and buliminids species (Figs.…”

Section: Influence Of Eutrophication On Benthic Foraminiferamentioning

confidence: 97%

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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“…Nonetheless, in recent decades, the number of studies using foraminifera as bioindicators in tropical areas has increased, which a focus on the foraminiferal response to natural (Debenay et al 2001;Duleba and Debenay 2003;Laut et al 2016a;Belart et al 2019) and anthropogenic (Vilela et al 2004(Vilela et al , 2011Teodoro et al 2009;Eichler et al 2015;Laut et al 2016bLaut et al , 2021aBelart et al 2018;Raposo et al 2018;Pregnolato et al 2018;Martins et al 2020) environmental stresses. A few studies addressing the effect of trace element pollution on the benthic foraminiferal community have also been performed (Debenay and Fernandez 2009;Lacuna and Alviro 2014;Martínez-Colón et al 2009, 2018ab;Sánchez et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Benthic Foraminiferal Response to Trace Elements in a Tropical Mesotidal Brazilian Estuary

Raposo

Frontalini

Clemente

et al. 2022

Estuaries and Coasts

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Living benthic foraminifera have been widely used as ecological indicators in coastal ecosystems. There is, however, a lack of studies on their response to trace element pollution in tropical estuarine systems. Here we analyze the living assemblages of benthic foraminifera, collected in 2016, in the Cachoeira River Estuary (CRE) in northeastern Brazil, to understand their response to natural and anthropogenic stressors, including trace element pollution. Some species were good bioindicators of specific environmental conditions, such as the agglutinant Paratrochammina clossi which preferred mangrove areas and anoxic conditions. In addition, the calcareous Ammonia tepida and Cribroelphidium excavatum, dominant within the whole system disregarding organic or trace element pollution, seem to resist even in the areas most polluted by trace elements. Interestingly, C. excavatum showed a particular positive relationship with trace element pollution (specifically by Cu and Pb), outnumbering the opportunistic A. tepida in the areas with higher pollution of these metals. However, for other species, it is still difficult to constrain to which parameters they respond (i.e., Haynesina germanica and Elphidium gunteri, which in the present study seem to respond to natural conditions, whereas in the literature they are regarded as indicators of trace element and organic pollution, respectively). Therefore, our findings shed light on the response of benthic foraminiferal species in a highly polluted and highly mixed tropical estuarine system and highlight the need to understand the complexity of these environments when applying foraminiferal biological indexes to avoid imprecise conclusions.

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Seasonal Dynamics of Benthic Foraminiferal Biocoenosis in the Tropical Saquarema Lagoonal System (Brazil)

Cited by 15 publications

References 59 publications

Living benthic foraminiferal assemblages monitored monthly in a tide-dominated estuary, Bertioga Channel, Brazil

Living benthic foraminiferal assemblages monitored monthly in a tide-dominated estuary, Bertioga Channel, Brazil

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

Benthic Foraminiferal Response to Trace Elements in a Tropical Mesotidal Brazilian Estuary

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