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Impact of environmental caffeine contamination in zebrafish: ecotoxicological a...
Pinto, I.; Diogo, B. S.; Antunes, S. C.; Rodrigues, S.Background: Caffeine (CAF) is considered a suitable indicator of anthropogenic contamination of aquatic environments, and several pharmacological and biological effects have been observed in target and non-target organisms [1,2]. Objective: Assess the chronic effects of environmental concentrations of CAF in several biomarker responses in Danio rerio. Methods: After chronic exposure to CAF (0.16, 0.42, 1.09, 2....
The ecotoxicity evaluation of Gens ponds: are the pH values a confounding factor?
Pereira, R.; Diogo, B. S.; Rodrigues, I.; Antunes, S. C.Background: Portuguese polymetallic mining activities were important for local development of economy and ceased in 1970s. However, these activities leave amounts of tailings susceptible to erosion and chemical weathering, representing a potential risk to the environment, due to a high concentration of heavy metals and acidic mine drainages [1,2]. Gens ponds arose due to open pit mining in a gold-antimony mine ...
Ecotoxicological effects of elutriates from coal mining waste in Lactuca sativa...
Rajnauth, A.; Diogo, B. S.; Marques, J. E.; Flores, D.; Antunes, S. C.Background: Fojo mine (Castelo de Paiva, Douro Carboniferous Basin) was used for anthracite exploitation until 1994, resulting in the production of coal waste piles without any environmental management [1,2]. In October 2017, a wildfire triggered the ignition of some of these waste piles. The extinguishing process of the fire included the remobilization of the coal mining residues using water mixed with a cooli...
Metal selective pressure in the modulation of the microbial community in sedime...
Almeida, E.; Torre, R.; Godinho, O.; Noyer, M.; Cravo-Laureau, C.; Duran, R.; Antunes, S. C.; Catita, J.; Lage, O. M.Background: Microorganisms in sediments of estuarine ecosystems play key roles in the biogeochemical cycles [1]. These communities, essential for maintaining the ecosystems quality, are affected by natural and anthropogenic factors, such as metals, affecting the ecosystems health [2]. Objectives: This work aims to understand the effect/impact of metals on brackish sediment microbial community in a mesocosm expe...
Study of metal presence in the sediments of three different water bodies from t...
Torre, R.; Pinto, I.; Lage, O. M.; Noyer, M.; Almeida, E.; Cravo-Laureau, C.; Duran, R.; Antunes, S. C.; Catita, J.Background: Human impact on the planet’s biomes has been rapidly increasing over the last decades [1]. In aquatic ecosystems, an active monitoring of the water and the sediments quality is already essential to assure its suitability for human use as well as to guarantee the health of the ecosystems [2, 3]. Objectives: This work focuses on the study of metals concentration in transitional water bodies (Ave estua...
The unknown acute toxicity of the antibiotic sulfamethoxazole
Diogo, B. S.; Rodrigues, S.; Antunes, S. C.Background: Sulfamethoxazole (SMX) is one of the most used antibiotics in the last 50 years, applied to humans, veterinary medicines, and aquaculture purposes [1]. Detected in different environmental matrices this antibiotic can pose a risk to aquatic ecosystems and contribute to the spread of antimicrobial resistance [2,3]. In addition, SMX has already been included in the 3rd Priority Substances Watch Lis...
Acute toxicity screening of 4-chloroaniline in freshwater standard species
Rebelo, D.; Antunes, S. C.; Rodrigues, S.Background: Aromatic amines are commonly used in the production of pigments, dyes, pharmaceuticals, pesticides, and laboratory chemicals [1]. Due to inappropriate discard and the ineffectiveness of wastewater treatment plants in removing these compounds, they are frequently detected in aquatic ecosystems [2], leading to 4-chloroaniline being considered a candidate for the 4th Watch List under the Water Fram...
Sensitivity of freshwater species under single and multigenerational exposure t...
Venancio, C.; Castro, Bruno B.; Ribeiro, R.; Antunes, S. C.; Abrantes, N.; Soares, A. M. V. M.; Lopes, I.Salinization of coastal freshwater ecosystems is already occurring in some regions of the world. This phenomenon raises serious concerns on the protection of coastal freshwater ecosystems, since many of them support and shelter a large number of species and are considered hotspots of biodiversity. This work intended to assess the adverse effects that salinization, caused by the intrusion of seawater (SW), may p...
Sensitivity to salinization and acclimation potential of amphibian (Pelophylax ...
Venancio, C.; Castro, Bruno B.; Ribeiro, Rui Tomé; Antunes, S. C.; Lopes, I.Predictions of the International Panel for Climate Changes on sea level rise foresee that the number of coastal regions impacted with salinization will increase in a near future. The present work intended to evaluate the sensitivity to salinization of two freshwater vertebrate species (the frog Pelophylax perezi and the fish Lepomis gibbosus) and their ability to acclimate to this stressor. For this, three spec...
Transgenerational Effects of Toxicants: An Extension of the Daphnia 21-day Chro...
Castro, Bruno B.; Freches, A. R.; Rodrigues, M.; Nunes, B.; Antunes, S. C.The assessment of transgenerational effects should be incorporated in standard chronic toxicity protocols for the sake of a realistic extrapolation of contaminant effects to the population level. We propose a simple add-on to the standard 21-day chronic Daphnia magna assay, allowing the assessment of the reproductive performance of the offspring (F-1 generation) born from the first clutch of the parental (F-0) ...