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

Castelo, Wellen Fernanda Louzada; Martins, Maria Virgínia Alves; Martínez-Colón, Michael; Guerra, Josefa Varela; Dadalto, Tatiana Pinheiro; Terroso, Denise; Soares, Maryane Filgueiras; Frontalini, Fabrizio; Duleba, Wânia; Socorro, Orangel Antonio Aguilera; Geraldes, Mauro César; Rocha, Fernando; Bergamaschi, Sérgio

doi:10.1007/s11356-020-12179-9

Cited by 25 publications

(10 citation statements)

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“…In such coastal settings, washover fans and flood tidal deltas might represent a significant source of sediment for barrier growth, as observed, for instance, by Buynevich et al (2004) and Fornari et al (2012). Castelo et al (2021) identified a sharp decrease in the feldspar/quartz ratio in sediments dated at ca. 6.5–6.3 ka, which was attributed to major changes in the configuration of Marambaia Barrier Island, leading to a less-confined bay, probably related to channels observed in stratigraphic unit SU2 (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Castelo et al (2021) considered that the main sediment sources for Marambaia Bay consisted of: (1) reworked mature lithics from nearby drainage basins and from nearby rock outcrops, probably from Marambaia Peak, between ca. 9.5–7.8 ka, still under subaerial conditions; (2) materials of coastal and fluvial origin, as the transgression slowed down towards its maximum elevation ca.…”

Section: Discussionmentioning

confidence: 99%

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Holocene morpho-sedimentary evolution of Marambaia Barrier Island (SE Brazil)

et al. 2021

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Barrier islands are sedimentary bodies susceptible to changes in sediment supply, dominant physical processes, and sea level. The aim of this work was to study the sedimentary processes that established Marambaia Barrier Island (SE Brazil) as an elongated sandy body that created Sepetiba Bay. For this purpose, barrier and back-barrier bay environments were analyzed using high-resolution satellite imagery, geophysical and topographic surveys, surface sediment samples and short cores, and radiocarbon and optically stimulated luminescence (OSL) dating techniques. Seven morpho-sedimentary domains were identified: coastal beach ridges, overland flow features, inter-ridge paleo lagoon, bayside beach ridges, marshlands, dune field and tidal wetlands. The results show that Marambaia Barrier Island evolved throughout the Holocene, first under normal regression conditions during sea-level rise, and then by forced regression as sea level lowered to its present position. Concurrent processes related to longshore drift, onshore transport, reworked barrier deposits, eolian transport, bay circulation, and pedogenesis influenced its morpho-sedimentary evolution. Morphological features such as truncated beach ridges, flying spits, and filled channels attest to the occurrence of alternating periods of erosion and accretion, evincing how the morphology of barrier island systems preserves an important archive of environmental changes.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Holocene morpho-sedimentary evolution of Marambaia Barrier Island (SE Brazil)

et al. 2021

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“…A atividade antrópica na enseada é sugerida pelo incremento de metais e na dinâmica de dispersão desses metais, bem como na modificação do regime sedimentar e comportamento geoquímico (Martins et al, 2020b;Castelo et al, 2021a) dos mesmos, dentre essas influências, os efluentes da CNAAA têm influência muito acentuada quanto ao retrabalho, dispersão e precipitação de metais, tanto pela elevação da temperatura, quanto pela turbidez gerada com suspensão e ressuspensão de material particulado.…”

Section: Conclusõesunclassified

“…Este estudo foi realizado na zona costeira do estado do Rio de Janeiro compreendida entre os municípios de Guaratiba, Angra dos Reis e Paraty, denominada Costa Verde, apresenta diversas enseadas, penínsulas e ilhas que impedem a circulação de correntes marítimas (Fonseca et al, 2020;Castelo et al, 2021a). Esses municípios estão localizados no mais importante entorno geoeconômico do Brasil e vem sendo considerada uma área potencialmente catalisadora de desenvolvimento, despontando como um dos polos industriais do Rio de Janeiro (Dias et al, 2017;Duleba et al, 2018;Baptista et al 2020) O crescimento industrial acelerado e a ocupação do solo desordenada são responsáveis pelo lançamento de inúmeras substâncias tóxicas nos afluentes que deságuam no mar (Newton et al, 2020;Amin E Almahasheer, 2022;Ballut-Dajud et al, 2022).…”

Section: Introductionunclassified

Geoquímica dos Sedimentos de Fundo da Enseada de Ribeira – Rio de Janeiro, Brasil.

Veiga

Souza²,

Cunha

et al. 2022

Rev. Bras. Geog. Fis.

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A baia da Ilha Grande circunda Angra dos Reis e Ilha Grande e apresenta influência antrópica tanto pela dinâmica das cidades ali instaladas, quanto pelo aumento da população quando em período de alta temporada – uma vez que esta é uma região turística. Soma-se a isso, o fato de estarem situadas nessa mesma região o Porto de Bracuhy e as duas usinas nucleares brasileiras (Angra 1 e 2), que se valem da enseada da Ribeira, localizada dentro da baia, para seu arrefecimento. Portanto esse estudo visa identificar os possíveis contaminantes nessa região, utilizando as concentrações de metais, através da análise de sedimentos de fundo. A coleta do sedimento de fundo foi realizada utilizando amostrador Van Veen. A digestão da amostra foi realizada em solução ácida e quantificada por Espectrometria de Massa Induzida por Plasma (EMPI) na qual se obteve a concentração multielementar de elementos maiores, menores e traços. A enseada da Ribeira tem seus metais fornecidos pelas atividades industriais da região, além de ter influência nos processos de sedimentação, dada pelos efluentes oriundos das usinas nucleares, e controlados por temperatura e salinidade. A partir da correlação das fontes, relacionou-se fontes naturais e antrópicas e suas concentrações média de elementos maiores e menores variam entre 6,32 e 0,06% e, os elementos traços apresentam concentrações médias entre 0,07 e 639 mg.kg -1, sendo os valores mais altos para bário, estrôncio e manganês. Estes elementos têm origem tanto antrópica quanto natural e são controlados por fatores como temperatura, correntes, procedência e natureza química de cada elemento.Palavras-chave: geoquímica ambiental, metais pesados, geologia costeira Geochemistry of the Bottom Sediments of the Ribeira Cove – Rio de Janeiro, Brazil.AbstractThe Ilha Grande bay has anthropogenic influence both due to the dynamics of the cities as well as the increase in population during high season – since this is a tourist region. Added to this, the fact that the Port of Bracuhy and the two Brazilian nuclear power plants (Angra 1 and 2), which use Ribeira Bay water for cooling processes. Therefore, this study aims to identify possible contaminants in this region, using metal concentrations, through the analysis of bottom sediments. The sampling of the bottom sediment was carried out using a Van Veen sampler; Digestion of the sample was carried out in acid solution and quantified by Inductive Plasma Mass Spectrometry ( ICP-MS) in which the multielemental concentration of major and trace elements was obtained, respectively. The Ribeira Bay has its metals supplied by industrial activities in the region, in addition to the influence on the sedimentation process, given by the effluents of the nuclear power plants, and controlled by temperature and salinity. From the correlation of sources, natural and anthropogenic sources surface distribution patterns were characterized, and their average concentrations of major and minor elements vary between 6.32 and 0.06%, and trace elements have average concentrations between 0.07 and 639 mg.kg -1, the highest values being for barium, strontium and manganese. These elements have both human and natural origin and are controlled by factors such as temperature, currents, origin and chemical nature of each element. Regardless of the fact that the results reveal less likelihood of adverse effects occurring, the increase in significant human interference in the ecosystem is indisputable, requiring constant and effective monitoring of aquatic systems such as the Ribeira Bay and conservation programs, in order not to allow the evolution of environmental degradation.Keywords: environmental geochemistry, heavy metals, coastal geology

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“…Threshold values for determining EcoQS classes according to Hlog2 and ES100 [75], Exp (H' bc ) [49,74], TSI-Med [50], FSI [76], Foram-AMBI [77], and NQIf [75]. The foraminifera-based Exp (H' bc ) method has, since then, been successfully tested in a variety of transitional waters, i.e., fjords [74], lagoons [78], harbors [61], bays [78], and estuaries [25,79,80], in both subtidal [49] and intertidal conditions [78]. Furthermore, the index was successfully implemented in different biogeographical regions, i.e., Scandinavia [19], European Atlantic coasts [23,78], the Mediterranean Sea [49], and in South America in Brazil [25].…”

Section: Foraminiferal Diversity Indicesmentioning

confidence: 99%

Benthic Foraminiferal Indices and Environmental Quality Assessment of Transitional Waters: A Review of Current Challenges and Future Research Perspectives

O’Brien

Asteman

Bouchet

2021

Water

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Transitional waters straddle the interface between marine and terrestrial biomes and, among others, include fjords, bays, lagoons, and estuaries. These coastal systems are essential for transport and manufacturing industries and suffer extensive anthropogenic exploitation of their ecosystem services for aquaculture and recreational activities. These activities can have negative effects on the local biota, necessitating investigation and regulation. As a result of this, EcoQS (ecological quality status) assessment has garnered great attention as an essential aspect of governmental bodies’ legislative decision-making process. Assessing EcoQS in transitional water ecosystems is problematic because these systems experience high natural variability and organic enrichment and often lack information about their pre-human impact, baseline, or “pristine” reference conditions, knowledge of which is essential to many commonly used assessment methods. Here, foraminifera can be used as environmental sentinels, providing ecological data such as diversity and sensitivity, which can be used as the basis for EcoQS assessment indices. Fossil shells of foraminifera can also provide a temporal aspect to ecosystem assessment, making it possible to obtain reference conditions from the study site itself. These foraminifera-based indices have been shown to correlate not only with various environmental stressors but also with the most common macrofaunal-based indices currently employed by bodies such as the Water Framework Directive (WFD). In this review, we firstly discuss the development of various foraminifera-based indices and address the challenge of how best to implement these synergistically to understand and regulate human environmental impact, particularly in transitional waters, which have historically suffered disproportionate levels of human impact or are difficult to assess with standard EcoQS methods. Further, we present some case studies to exemplify key issues and discuss potential solutions for those. Such key issues include, for example, the disparate performance of multiple indices applied to the same site and a proper assignment of EcoQS class boundaries (threshold values) for each index. Disparate aptitudes of indices to specific geomorphologic and hydrological regimes can be leveraged via the development of a site characteristics catalogue, which would enable the identification of the most appropriate index to apply, and the integration of multiple indices resulting in more representative EcoQS assessment in heterogenous transitional environments. In addition, the difficulty in assigning threshold values to systems without analogous unimpacted reference sites (a common issue among many transitional waters) can be overcome by recording EcoQS as an ecological quality ratio (EQR). Lastly, we evaluate the current status and future potential of an emerging field, genetic biomonitoring, focusing on how these new techniques can be used to increase the accuracy of EcoQS assessment in transitional systems by supplementing more established morphology-based methods.

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

Cited by 25 publications

References 132 publications

Holocene morpho-sedimentary evolution of Marambaia Barrier Island (SE Brazil)

Holocene morpho-sedimentary evolution of Marambaia Barrier Island (SE Brazil)

Geoquímica dos Sedimentos de Fundo da Enseada de Ribeira – Rio de Janeiro, Brasil.

Benthic Foraminiferal Indices and Environmental Quality Assessment of Transitional Waters: A Review of Current Challenges and Future Research Perspectives

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