Sub-lethal Responses of the Polychaete Armandia agilis in Whole-sediment Toxicity Testing

Saes, Renan Vandre da Silva Toscano; Moreira, Lucas Buruaem; Peres, Tiago Farias; Taniguchi, Satie; Bı́cego, Márcia Caruso; Marins, Rozane Valente; Abessa, Denis Moledo de Souza

doi:10.1007/s00128-019-02556-7

Cited by 4 publications

(1 citation statement)

References 20 publications

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“…The compounds were quantitatively analyzed using an Agilent 6890 gas chromatograph coupled to a 5973N mass spectrometer (GC/MS). More details of sediment analysis are described in previous studies (Buruaem et al, 2016;Saes et al, 2019). The validation of analytical methods was assured by the analysis of surrogates, blank samples, and the reference materials of the National Institute of Standards and Technology for metals (NIST SRM 1646a), and hydrocarbons (NIST SRM 1944).…”

Section: Sediment Analysismentioning

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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Section: Sediment Analysismentioning

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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Biomarkers responses of the clam Anomalocardia flexuosa in sediment toxicity bioassays using dredged materials from a semi-arid coastal system

Moreira

Sasaki

Taniguchi

et al. 2020

Heliyon

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Few test organisms are employed for sediment toxicity assessments in Tropical regions, including Brazil. We assessed the ability of the clam Anomalocardia flexuosa to respond to contamination in sediment bioassays using dredging materials of a semi-arid region (Cear a State, NE Brazil), with attention to sublethal responses. Sediments were collected during and after dredging (survey 1 and 2, respectively) and animals exposed in laboratory over 28 days, with responses measured at 7 days. Bioaccumulation of contaminants was determined in whole-body soft tissues as a metric of bioavailability, and biomarkers' changes were monitored in terms of enzymes of phase I and II metabolism, acetylcholinesterase (AChE), and antioxidant responses, lipid peroxidation (LPO) and DNA damage (strand breaks). Clams accumulated aliphatic (AHs) and aromatic hydrocarbons (PAHs), and linear alkylbenzenes (LABs) compared to control conditions (day 0), with increased amounts of As, Cd, Cu, and Zn observed in some samples. The enzyme glutathione S-transferase was enhanced in animals exposed to samples, indicating activation of phase II metabolism. Changes observed in glutathione peroxidase (GPx), glutathione reductase (GR), LPO and strand breaks were related to oxidative stress. AChE enzymatic activity also changed, as an indicator of neurotoxicity caused by sediment exposure. The computed integrated biomarker response index (IBR) ranked sites according to the contamination status and proximity to its sources. Correlations found for biomarkers and bioaccumulation of hydrocarbons indicated the influence of harbor activities, effluent discharges, and urban runoff on the sediment pollution of Mucuripe Bay. Data also showed that SQGs are unable to predict bioaccumulation and subchronic effects. Based on our results we consider that biomarkers responses in A. flexuosa are important endpoints to be applied in sediment toxicity bioassays in tropical regions.

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Impacts of dredging on biomarkers responses of caged bivalves in a semi-arid region (Ceará State, NE Brazil)

Moreira

Sasaki

Taniguchi

et al. 2019

Marine Environmental Research

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Sub-lethal Responses of the Polychaete Armandia agilis in Whole-sediment Toxicity Testing

Cited by 4 publications

References 20 publications

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

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

Biomarkers responses of the clam Anomalocardia flexuosa in sediment toxicity bioassays using dredged materials from a semi-arid coastal system

Impacts of dredging on biomarkers responses of caged bivalves in a semi-arid region (Ceará State, NE Brazil)

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