Benthic foraminiferal and organic matter compounds as proxies of environmental quality in a tropical coastal lagoon: The Itaipu lagoon (Brazil)

Raposo, Débora; Clemente, Iara; Figueiredo, Marcos de Souza Lima; Vilar, Amanda; Lorini, Maria Lúcia; Frontalini, Fabrizio; Martins, V.; Belart, Pierre; Fontana, Luiz Francisco; Habib, Renan; Laut, Lázaro

doi:10.1016/j.marpolbul.2018.02.018

Cited by 31 publications

(21 citation statements)

References 46 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%

“…This methodology was used in some Brazilian transitional environments (e.g. Silva et al, 2011;Clemente et al, 2015;Laut et al, 2016Laut et al, , 2017Dias et al, 2017;Raposo et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…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%

“…The first study was carried out by Laut et al (2016) in Itaipú Lagoon (Niteroi city). The analysis of the quantity and quality of organic matter in this lagoon allowed: to identify three distinct regions with different level of environmental stress; to deduce that the organic matter accumulation was the result of hydrodynamic conditions mostly governed by tidal currents; to infer that the quality of organic matter was mainly influenced by urban effluents, river inputs and mangroves contributions as well as by the autochthonous lagoonal biological productivity (Raposo et al, 2018).…”

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%

“…This methodology was used in some Brazilian transitional environments (e.g. Silva et al, 2011;Clemente et al, 2015;Laut et al, 2016Laut et al, , 2017Dias et al, 2017;Raposo et al, 2018).…”

Section: Discussionmentioning

confidence: 99%