Encontrados 8 documentos, a visualizar página 1 de 1
Copper-driven avoidance and mortality in temperate and tropicaltadpoles
Araújo, Cristiano V.M.; Shinn, Cândida; Moreira-Santos, Matilde; Lopes, Isabel; Espíndola, Evaldo L. G.; Ribeiro, R.Amphibians have experienced an accentuated population decline in the whole world due to many factors,one of them being anthropogenic contamination. The present study aimed to assess the potential effect ofcopper, as a worldwide and reference contaminant, on the immediate decline of exposed population dueto avoidance and mortality responses in tadpoles of three species of amphibians across climatic zones:a South...
Ethoprophos fate on soil–water interface and effects on non-target terrestrial ...
Leitão, Sara; Moreira-Santos, Matilde; Van den Brink, Paul J.; Ribeiro, R.; Cerejeira, M. José; Sousa, J. P.The present study aimed to assess the environmental fate of the insecticide and nematicide ethoprophos in the soil–water interface following the pesticide application in simulated maize and potato crops under Mediterranean agricultural conditions, particularly of irrigation. Focus was given to the soil–water transfer pathways (leaching and runoff), to the pesticide transport in soil between pesticide applicatio...
Copper-driven avoidance and mortality in temperate and tropical tadpoles
Araújo, Cristiano V. M.; Shinn, Cândida; Moreira-Santos, Matilde; Lopes, Isabel; Espíndola, Evaldo L. G.; Ribeiro, RuiAmphibians have experienced an accentuated population decline in the whole world due to many factors, one of them being anthropogenic contamination. The present study aimed to assess the potential effect of copper, as a worldwide and reference contaminant, on the immediate decline of exposed population due to avoidance and mortality responses in tadpoles of three species of amphibians across climatic zones: a S...
Development and validation of an experimental life support system for assessing...
Coelho, Francisco J. R. C.; Rocha, Rui J. M.; Pires, Ana C. C.; Ladeiro, Bruno; Castanheira, José M.; Costa, Rodrigo; Almeida, Adelaide; Cunha, ÂngelaAn experimental life support system (ELSS) was constructed to study the interactive effects of multiple stressors on coastal and estuarine benthic communities, specifically perturbations driven by global climate change and anthropogenic environmental contamination. The ELSS allows researchers to control salinity, pH, temperature, ultraviolet radiation (UVR), tidal rhythms and exposure to selected contaminants. ...
Going with the Flow: Detection of Drift in Response to Hypo-Saline Stress by th...
Araujo, Cristiano V. M.; Romero-Romero, Sonia; Lourençato, Lucio F.; Moreno-Garrido, Ignacio; Blasco, Julián; Gretz, Michael R.; Moreira-Santos, MatildeAvoidance response is a well-known mechanism for escaping environmental stress. For organisms with reduced active movement, such as benthic microalgae, drifting could be a specifically selected mean of avoiding less favorable environments. To test this hypothesis, a system was developed to assess if hypo-saline stress triggers drift in the estuarine benthic diatom Cylindrotheca closterium. Concurrently, the eff...
A laboratory and in situ postexposure feeding assay with a freshwater snail
Correia, Vânia; Ribeiro, R.; Moreira-Santos, MatildeContaminant-driven feeding inhibition has direct and immediate consequences at higher levels of biological organization, by depressing the population consumption and thus hampering ecosystem functioning (e.g., grazing, organic matter decomposition). The present study aimed at developing a short-term laboratory and in situ assay based on the postexposure feeding of the freshwater snail Theodoxus fluviatilis. A m...
An in situ postexposure feeding assay with Carcinus maenas for estuarine sedime...
Moreira, Susana M.; Moreira-Santos, Matilde; Guilhermino, Lúcia; Ribeiro, RuiThis study developed and evaluated a short-term sublethal in situ toxicity assay for estuarine sediment-overlying waters, with the crab Carcinus maenas (L.) based on postexposure feeding. It consisted of a 48-h in situ exposure period followed by a short postexposure feeding period (30 min). A precise method for quantifying feeding, using the Polychaeta Hediste (Nereis) diversicolor Müller as food source, was f...
An in situ bioassay for freshwater environments with the microalga Pseudokirchn...
Moreira-Santos, Matilde; Soares, Amadeu M. V. M.; Ribeiro, RuiThis study was designed to evaluate the suitability of an in situ microalgal bioassay with Pseudokirchneriella subcapitata to be used in freshwater environments. The assay potential was investigated by deploying it in a system impacted by acid mine drainage. Water samples were collected to perform a laboratory assay also. P. subcapitata was viewed to be a good option for the in situ assay because it grew well a...
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