Principal component analysis (PCA) and mineral associations of litoraneous facies of continental shelf carbonates from northeastern Brazil

Marques, Wanessa Sousa; Sial, Alcídes N.; Menor, Eldemar de Albuquerque; Ferreira, Valderez P.; Freire, George Satander Sá; Lima, Enjôlras de Albuquerque Medeiros; Manso, Valdir do Amaral Vaz

doi:10.1016/j.csr.2008.09.005

Cited by 16 publications

(11 citation statements)

References 21 publications

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“…In both sampling campaigns, the highest levels of OM occurred in the mid-estuary (P4-P7). However, all along the JPE, OM levels were within the range expected for tropical estuaries from northeastern Brazil (0.76-38.9%) (Freire et al, 2004;Lacerda and Marins, 2005;Marques et al, 2008;Nascimento et al, 2010). The distribution of OM in the sediments presented a pattern similar to that exhibited by the fine sediments, a finding which reinforces the possibility that the lower and mid-estuarine zones are depositional areas.…”

Section: Sediment Propertiessupporting

confidence: 71%

Using an integrated approach to assess the sediment quality of an estuary from the semi-arid coast of Brazil

Souza

Araujo

Cruz

et al. 2016

Marine Pollution Bulletin

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The Jundiaí-Potengi Estuary (JPE) on the semi-arid coast of Brazil is influenced by multiple sources of pollution. Sediment quality at 10 JPE sites was evaluated through an integrated approach. Rainy and dry seasons were considered. Collected sediments were analyzed for texture, metal, nitrogen, phosphorus concentrations, and toxicity to invertebrates. Geochemical and ecotoxicological data were integrated using qualitative approaches and multivariate techniques. We observed decreased sediment quality in both seasons, particularly in the mid-estuary. In the dry season, the contamination-toxicity relationship was clearer, as hydrological conditions favor contaminant retention within the estuary. Rainy season conditions were found to be worse, since stormwater drainage from agricultural and urban areas carries the contamination into the estuary. Because of the contamination sources and dissolved and particle-bound metal transport, contamination and toxicity did not correlate as clearly in the rainy season. The results suggest that unmeasured contaminants are contributing to JPE sediment degradation.

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Section: Sediment Propertiessupporting

confidence: 71%

Using an integrated approach to assess the sediment quality of an estuary from the semi-arid coast of Brazil

Souza

Araujo

Cruz

et al. 2016

Marine Pollution Bulletin

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“…Calcium carbonates and organic matter levels presented high levels at the deeper stations, especially in sheltered areas, which can be associated with the deposition in both harbors induced by the jetty. These results corroborate the characteristic of sediments from terrigenous facies of this region (Freire et al 2004;Marques et al 2008). The sediments collected in navigation channel of Port of Santos presented a predominance of very fine sands, with increasing fine particles (coarse silt) towards the inner estuary not considering the predominance of fine particles in S1.…”

Section: Resultssupporting

confidence: 79%

Soft-bottom polychaetes from the Brazilian harbors of Mucuripe and Pecém (state of Ceará) and Santos (state of São Paulo)

Buruaem¹,

Petti²,

Abessa³

2015

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Abstract:The analysis of polychaete fauna from 20 softbottom samples collected in different shallow sectors of Mucuripe, Pecém and Santos harbors provided a list of 34 different taxa, totaling 366 individuals. A comparison with recent published data revealed the first occurrence of two polychaete genera and 10 species in Ceará state. Distribution by station, depth and type of sediment was also provided. Despite the considerable knowledge of polychaete fauna from the coast of Brazil especially in the southeastern region, little attention has been given to the harbor areas, which are under influence of anthropogenic impacts. This study represents an important inventory of polychaete fauna found in three harbors from the northeastern (Mucuripe and Pecém, State of Ceará) and southeastern (Santos, state of São Paulo) regions of Brazilian coast.

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“…The climate in coastal zone of Brazilian semi-arid is influenced by the Intertropical Convergence Zone (ITCZ) conditions, with average temperatures ranging from 24°C to 30°C and the predominance of trade winds blowing from the E-SE, controlling thus the sediment transport in the region (Maia et al, 1998;Paula et al, 2013). The sedimentology of Ceará coast is characterized by organogenic facies with elevated deposition of calcium carbonate from calcareous algae and terrigenous facies marked by clastic rocks and clay (Lacerda & Marins, 2006;Marques et al, 2008). A predominance of coarser sediments is found in the outer shelf contrasting with sandy particles with low amounts of mud that cover the inner shelf (Freire et al, 2004).…”

Section: Study Area and Sediment Samplingmentioning

confidence: 99%

Toxicity of sediments and dredged material from a semi-arid coastal system to marine invertebrates

Moreira¹,

Saes²,

Peres³

et al. 2020

Ecotoxicol. Environ. Contam.

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Dredging involves the sediment excavation in order to increase the bathymetry of harbors by different methods. In urbanized and Industrial areas, dredging pose risks of negative effects on the biota due to sediment contamination. The Brazilian criteria for characterizing dredged material include chemical analyzes and comparison with sediment quality guidelines and toxicity testing, which require the development of novel and different biological models to be used in bioassays. In this study, we aimed to assess the quality of sediments collected during dredging activities of Mucuripe Bay (Fortaleza city, NE Brazil). Sediments were characterized for the concentration of metals and hydrocarbons, in order to establish the contamination status. Whole sediment toxicity was assessed by means of mortality of the amphipod Tiburonella viscana and the polychaete worm Armandia agilis, while chronic effects were evaluated on the fecundity of the copepod Tisbe biminiensis. Liquid phase exposures were determined in the acute toxicity of sediment-water interface (ISA) on the mysid Mysidopsis juniae, while chronic toxicity of ISA and elutriates (ELU) assessed by the embryo-larval development of the sea urchin Lytechinus variegatus. Results revealed that contaminated samples exhibited both acute and chronic toxicity. An integrative method for integrating different endpoints was employed and classified samples related to dredging activities as the most degraded. Extracts obtained from the material collected within the dredge were also tested for acute and chronic effects and exhibited toxicity as well. Based on our findings we recommend the analysis of material from dredger cistern and application of a set of bioassays in order to properly determine the quality of dredged sediments.

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Principal component analysis (PCA) and mineral associations of litoraneous facies of continental shelf carbonates from northeastern Brazil

Cited by 16 publications

References 21 publications

Using an integrated approach to assess the sediment quality of an estuary from the semi-arid coast of Brazil

Using an integrated approach to assess the sediment quality of an estuary from the semi-arid coast of Brazil

Soft-bottom polychaetes from the Brazilian harbors of Mucuripe and Pecém (state of Ceará) and Santos (state of São Paulo)

Toxicity of sediments and dredged material from a semi-arid coastal system to marine invertebrates

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