Assessment of the Trophic State of Saquarema Lagoonal System, Rio De Janeiro (Brazil)

Dias, Pierre Philippe Belart Brandão; Martins, Maria Virgínia Alves; Clemente, Iara; Carelli, Thiago Gonçalves; Silva, Frederico Sobrinho da; Fontana, Luiz Francisco; Lorin, Maria Lucia; Panigai, Gabriel di; Pinheiro, Renan Habib; Filho, João Graciano Mendonça; Laut, Lázaro

doi:10.12957/jse.2017.28194

Cited by 20 publications

(17 citation statements)

References 30 publications

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“…The surface sediments of MGLS present relatively high TS contents, which are similar to that found in other Brazilian lagoons, such as Itaipu (Laut et al 2016;Raposo et al, 2018), Saquarema (Dias et al, 2017;Belart et al, 2018) and Vermelha lagoons (Laut et al, 2017). However, the recorded values were lower than in other polluted costal environments, such as Santos Estuary (Siqueira et.…”

Section: Discussionsupporting

confidence: 75%

“…The Maricá-Guarapina Lagoon System (MGLS) is located 50 km away from the Rio de Janeiro city and is composed by four connected lagoons: Maricá, Barra, Padre and Guarapina. This ecosystem are evolving to an increasing degradation, as well as other lagoons of the Rio de Janeiro State (Laut et al, 2016(Laut et al, , 2017Dias et al, 2017;Raposo et al, 2018). The current environmental degradation of the MGLS is being caused by the anthropic activities developed in this region, namely by the intense and disorderly property speculation.…”

Section: Introductionmentioning

confidence: 99%

“…The excessive discharge of nutrients from domestic and industrial sewage pipes as well as the surface runoff from urban and agrarian areas has created an enrichment of organic and inorganic nutrients in this transitional ecosystem (Silva et al, 2011) aggravating its eutrophication progression. This process is considered the major factor that is causing coastal environmental degradation (Meyer-Reil and Koster, 2000), as it is happening in Rio de Janeiro lagoons (Laut et al, 2016(Laut et al, , 2017Dias et al, 2017;Raposo et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…In Saquarema Lagonal System, Dias et al (2017) identified distinct regions such as: an inner and impacted zone where the sediments are particularly enriched in organic matter provided by contaminated effluents and by the rivers outflow; an outer-less impacted zone submitted to high hydrodynamic energy and; an intermediate area characterized by transitional conditions between the two previously mentioned.…”

Section: Introductionmentioning

confidence: 99%

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Organic Compounds as Proxies of the Sedimentary Environmental Quality of the Maricá-Guarapina Lagoon System (Se, Brazil)

et al. 2019

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Bottom sediment is a natural trap for organic matter and different kinds of pollutants. The accumulation of large amount of organic matter gives rise to the eutrophication of the aquatic ecosystems. The analyses of the quantity and quality of the organic matter (biopolymers) help to determine the trophic status of coastal ecosystems. The Maricá-Guarapina Lagoon System (MGLS) is located in Rio de Janeiro and is composed by four connected lagoons: Maricá, Barra, Padre and Guarapina. It has been suffering impacts due to the intense and uncontrolled property speculation. Based on this problem, this study aimed to characterize the organic matter (OM) amount and quality in sediments and the relation with the impacted areas in this lagoon system. The collected sediment samples were analyzed for geochemical data combined with grain size and physical-chemical environmental parameters of the bottom water. Statistical results evidenced that the sedimentary environment of the MGLS is heterogenous. The organic matter supplied to the MGLS is provided from different sources but the autochthonous contribution (phytoplanktonic productivity and vegetal detritus from the mangrove fringe) prevails. The anthropogenic contribution was more evident in Padre Lagoon, where the sediments had relatively low TOC contents (0.1-0.8%). The MGLS is accumulating mainly aged organic matter. The most impacted zones were found in Guarapina, Barra and Maricá lagoons, in bottoms of fine-grained sediments, with relatively high TOC and labile biopolymeric compounds (proteins, carbohydrates and lipids) contents, which should evolve into an ever-increasing stage of eutrophication. COMPOSTOS ORGÂNICOS USADOS COMO INDICADORES DA QUALIDADE AMBIENTAL SEDIMENTAR DO SISTEMA LAGUNAR MARICÁ-GUARAPINA (SE DO BRASIL)ResumoO sedimento de fundo constitui uma armadilha natural para a matéria orgânica e diferentes tipos de poluentes. O acúmulo de grande quantidade de matéria orgânica dá origem à eutrofização dos ecossistemas aquáticos. Estimativas de quantidade e qualidade da matéria orgânica (biopolímeros) podem ajudar a determinar o estado trófico dos ecossistemas costeiros. O Sistema Lagunar de Maricá-Guarapina (MGLS), localizado no Estado do Rio de Janeiro (SE do Brasil), é composto por quatro lagunas interconectadas: Maricá, Barra, Padre e Guarapina. Este sistema tem sofrido impactos devido à intensa e descontrolada especulação imobiliária. Neste contexto, este estudo teve como objetivo caracterizar a quantidade e qualidade de matéria orgânica (MO) dos sedimentos do MGLS. Foram obtidos dados geoquímicos e confrontados com resultados granulométricos em amostras de sedimentos coletados em 22 estações de amostragem e analisados parâmetros físico-químicos da água. Os resultados estatísticos evidenciaram que o ambiente sedimentar do MGLS é heterogêneo. Este sistema recebe matéria orgânica de diferentes fontes, sendo, porém, prevalecente a contribuição autóctone (produtividade fitoplanctônica e detritos vegetais dos manguezais existentes na região). A contribuição antropogênica de matéria orgânica foi mais evidente na Lagoa do Padre, onde os sedimentos apresentaram teores de COT relativamente baixos (0,1-0,8%). As zonas mais impactadas foram encontradas em fundos de sedimentos finos, com teores relativamente elevados de COT e de compostos biopoliméricos lábeis (proteínas, carboidratos e lipídios), nas lagunas de Guarapina, Barra e Maricá. Os resultados obtidos revelam também que o MGLS está acumulando principalmente matéria orgânica envelhecida e permitem prever que as referidas áreas podem evoluir para um estágio de cada vez maior grau de eutrofização.Palavras-chave: Lagunas Costeiras Tropicais. Biopolímeros. Eutrofização. Dinâmica Sedimentar.

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Section: Discussionsupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Organic Compounds as Proxies of the Sedimentary Environmental Quality of the Maricá-Guarapina Lagoon System (Se, Brazil)

et al. 2019

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“…The 204 Pb, originated during the solar system formation, is the only natural radioactive isotope considered stable (Austin, 2005). It is therefore used as a reference for the standardization of other isotopes of this element 2016; Laut et al, 2016Laut et al, , 2019Dias et al, 2017;Alves Martins et al, 2018;Pregnolato et al, 2018). These materials have great affinity to heavy metals (Alves Martins 2015;Martins et al, 2015Martins et al, , 2017Suzuki et al, 2016;Zaaboub et al, 2016;Díaz Morales et al, 2019b) and can provide temporal information regarding the beginning of anthropic influence in the environment (Vilela et al, 2014;Bueno et al, 2019), which is one of the objectives of this research.…”

Section: Introductionmentioning

confidence: 99%

Sources of Pollutants in the Northern/Northeast Area of Guanabara Bay (Se, Brazil) Since the Late Nineteenth Century Using Lead Isotopes and Metal Concentrations

et al. 2019

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The coastal areas, the most populated regions in the world, are those which have undergone the greatest human influence. In Brazilian southeastern coast, the region around Guanabara Bay (GB) is one of the most densely populated, with large cities, such as Rio de Janeiro and Niteroi, and is highly industrialized. Due to anthropic activities tones of effluents, waste and sewage is daily released in GB. Despite, several works have been performed aiming to study the current and past human influence in GB, the sources of pollutants that have impacted this bay since the late nineteenth century. This work is a new contribution aiming to identify the main sources of pollution in the northern/northeast region of GB using stable isotopes of lead (Pb) and metal concentrations during the last decades. It analyses results obtained along the core T3 collected in the northeast region of Guanabara Bay, near the Guapimirim Environmental Protected Area (known as Apa de Guapimirim), a mangrove fringe. Twenty-two sediment samples collected along this core were submitted to grain size, total organic carbon content (TOC), elemental concentrations (Ag, Ca, Cu, P, Pb, S and Zn) and stable isotopes of lead (Pb) analyses. The sediment accumulation rate was estimated by 210Pb. Results of core T3 were compared with similar data acquired in core T8, collected in Guanabara Bay, at north of Paquetá island. The comparison of the geochemical results allowed to verify that both cores recorded the same reality. Previous works have shown that the northern/northeast region of Guanabara Bay is low polluted by metals, however, since the ≈1950 a marked increase in eutrophication and metal contamination and another noticeable pulse after ≈1970, were recorded in both cores studied in this work. The 206Pb/207Pb values suggest that the main source of pollutants to northern/northeast region of GB since the second half of the 20th century have been related to deforestation and landfill and embankment engineering works preformed around the GB, in addition to mineral products applied in industrial goods, as well as oil, agricultural and organic loads. FONTES DE POLUENTES NA ÁREA NORTE / NORDESTE DA BAÍA DE GUANABARA (SE, BRASIL), DESDE O SÉCULO XIX, COM BASE EM ISÓTOPOS DE CHUMBO E CONCENTRAÇÕES DE METAIS ResumoAs áreas costeiras, as mais populosas do mundo, são as que têm recebido a maior influência humana. No litoral sudeste brasileiro, a região em torno da Baía de Guanabara (GB), uma das mais densamente povoadas, com grandes cidades, como Rio de Janeiro e Niterói, é altamente industrializada. Devido às atividades antrópicas toneladas de efluentes, resíduos e esgoto são liberados diariamente na GB. Apesar de vários trabalhos terem sido realizados com o objetivo de estudar a influência humana atual e passada na GB, não se sabe quais têm sido as fontes de poluentes mais impactantes nesta baía desde o final do século XIX. Assim, este trabalho tem como principal objetivo identificar as principais fontes de poluição na região norte / nordeste da GB usando isótopos estáveis de chumbo (Pb) e concentrações de metais nas últimas décadas. Analisa os resultados obtidos ao longo do testemunho T3, coletado na região nordeste da Baía de Guanabara, próximo à Área Ambiental Protegida de Guapimirim (conhecida como Apa de Guapimirim), uma orla de mangue. Vinte e duas amostras de sedimentos coletadas ao longo deste testemunho foram submetidas a análises granulométricas, teor de carbono orgânico total (COT), concentrações elementares (Ag, Ca, Cu, P, Pb, S e Zn) e isótopos estáveis de chumbo (Pb). A taxa de acumulação de sedimentos foi estimada com Pb210. Os resultados do testemunho T3 foram comparados com dados semelhantes adquiridos no testemunho T8, coletado na Baía de Guanabara, a norte da ilha de Paquetá. A comparação dos resultados geoquímicos permitiu verificar que os dois testemunhos registram a mesma realidade. Trabalhos anteriores mostraram que a região norte / nordeste da Baía de Guanabara é pouco poluída por metais, no entanto, observou-se nos dois testemunhos que desde 1950 aumentou acentuadamente a eutrofização e a concentração de metais tendo ocorrido um outro pulso de contaminação depois de 1970. Os valores de 206Pb / 207Pb sugerem que as principais fontes de poluentes na região norte / nordeste da GB, desde a segunda metade do século 20, estiveram relacionadas com o desmatamento e aterros em torno da GB, além de minerais aplicados em produtos indústrias, e ainda petróleo, produtos aplicados na agricultura e matéria orgânica. Palavras-chave: Concentração de metais. Isótopos de Pb. Contaminação. Fontes de poluição. Litoral. Registro antropogénico.

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

Belart

Habib

Raposo

et al. 2019

Estuaries and Coasts

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Assessment of the Trophic State of Saquarema Lagoonal System, Rio De Janeiro (Brazil)

Cited by 20 publications

References 30 publications

Organic Compounds as Proxies of the Sedimentary Environmental Quality of the Maricá-Guarapina Lagoon System (Se, Brazil)

Organic Compounds as Proxies of the Sedimentary Environmental Quality of the Maricá-Guarapina Lagoon System (Se, Brazil)

Sources of Pollutants in the Northern/Northeast Area of Guanabara Bay (Se, Brazil) Since the Late Nineteenth Century Using Lead Isotopes and Metal Concentrations

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

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