10 documents found, page 1 of 1
Guardians of the flora: the peril of pesticides in Caatinga to native bees beha...
Abreu , Isabel Oliveira; Teixeira, Cláudia; dos Santos, Jefferson Alves; Rebouças, Jaíne Santos; Caldas, Maiara Janine MachadoBackground: The impact of pesticides on bees and the devastating effects of pesticides evokes a sense of urgency and concern among scientists and environmentalists alike [1]. Once hailed as agricultural saviours, pesticides now threaten bee populations globally. Neonicotinoids and organophosphates harm bee behaviour, hindering navigation, foraging, and reproduction. Sublethal doses further weaken bees, impactin...
Pesticides in a case study on no-tillage farming systems and surrounding forest...
da Silva, Karlo Alves; Nicola, Vitoria Beltrame; Dudas, Rafaela Tavares; Demetrio, Wilian Carlo; Maia, Lilianne Dos Santos; Cunha, LuísWith the growing global concern on pesticide management, the relationship between its environmental recalcitrance, food security and human health has never been more relevant. Pesticides residues are known to cause significant environmental contamination. Here, we present a case study on long-term no-tillage farming systems in Brazil, where Glyphosate (GLY) has been applied for more than 35 years. GLY and its m...
Computational and experimental study of time-averaged characteristics of positi...
Ferreira, Nuno G. C.; Almeida, Pedro G. C.; Benilov, Mikhail S.; Panarin, Victor A.; Skakun, Victor S.; Tarasenko, Victor F.; Naidis, George V.The use of stationary solvers instead of approximate solution methods or time-dependent solvers, which are standard tools in gas discharge modeling, allows one to develop a very fast and robust numerical model for studying the time-averaged characteristics of dc corona discharges. Such an approach is applied to dc corona discharges in point-plane gaps in ambi ent air. A wide range of currents of both voltage po...
Unravelling the molecular mechanisms of nickel in woodlice
Ferreira, Nuno G. C.; Morgado, Rui G.; Cunha, Luís; Novo, Marta; Soares, Amadeu M. V. M.; Morgan, Andrew J.; Loureiro, Susana; Kille, PeterDuring the last few years, there has been an alarming increase in the amount of nickel (Ni) being released into the environment, primarily due to its use in the production of stainless steel but also from other sources such as batteries manufacturing and consequent disposal. The established biotic ligand models provide precise estimates for Ni bioavailability, in contrast, studies describing the mechanisms unde...
Mercury accumulation from food decreases collembolans' growth
Cardoso, Diogo N.; Ferreira, Nuno G. C.; Tourinho, Paula S.; Santos, Cátia; Soares, Amadeu M. V. M.; Loureiro, SusanaIn the terrestrial environment, mercury (Hg) contamination can be originated from different inorganic and metal-organic sources, redistributed and transformed in soils. In the present study, the effects of contaminated food with environmentally relevant concentrations of Hg were evaluated in the soil-dwelling invertebrate Folsomia candida. Changes in growth rate and Hg bioaccumulation levels were observed at di...
Metabolic responses of the isopod Porcellionides pruinosus to nickel exposure a...
Ferreira, Nuno G. C.; Saborano, Raquel; Morgado, Rui; Cardoso, Diogo N.; Rocha, Claudia M.; Soares, Amadeu M. V. M.; Loureiro, Susana; Duarte, Iola F.This work aimed at characterizing the metabolome of the isopod Porcellionides pruinosus and at assessing its variations over 14 days under laboratory culture conditions and upon exposure to the contaminant metal Nickel (Ni). The spectral profiles obtained by H-1 NMR spectroscopy were thoroughly assigned and subjected to multivariate analysis in order to highlight consistent changes. Over 50 metabolites could be...
Abiotic factors affect the performance of the terrestrial isopod Porcellionides...
Morgado, Rui; Ferreira, Nuno G. C.; Cardoso, Diogo N.; Soares, Amadeu M. V. M.; Loureiro, SusanaAbiotic factors constitute one of the most important drivers shaping soil ecosystems. Although being a strongly buffered environment, soil heterogeneous nature combined with the limited mobility of its organisms can make them highly sensitive to unfavourable conditions. A thorough knowledge of these relationships is thus a critical starting point to understand the challenges posed to edaphic organisms in a cont...
Biomarkers and energy reserves in the isopod Porcellionides pruinosus: the effe...
Ferreira, Nuno G. C.; Morgado, Rui; Santos, Miguel J. G.; Soares, Amadeu M. V. M.; Loureiro, SusanaTerrestrial isopods from the species Porcellionides pruinosus were exposed to the recommended field dose application (0.4 mg/kg soil) and a sublethal concentration (10 mg/kg soil) of dimethoate at two temperatures that can be generally found in several countries (20 °C and 25 °C) and are commonly used as reference temperatures. The organisms were exposed for 28 days and sampled at the following time points: 24 ...
Preliminary evaluation of the toxic effects of the antifouling biocide Sea-Nine...
Cima, Francesca; Ferrari, Giulia; Ferreira, Nuno G. C.; Rocha, Rui J. M.; Serôdio, João; Loureiro, Susana; Calado, RicardoSea-Nine 211™ is a new biocide specifically formulated for antifouling paints and being considered to have a low environmental impact. Even with a short environmental half-life, this compound can cause toxic effects on marine organisms. This study used PAM fluorometry and biomarkers of oxidative stress (GST, CAT and LPO) to monitor potential toxic effects of Sea-Nine 211™ on fragments of the soft coral Sarcophy...
Environmental- and growth stage-related differences in the susceptibility of te...
Morgado, Rui; Ferreira, Nuno G. C.; Tourinho, Paula; Ribeiro, Fabianne; Soares, Amadeu M. V. M.; Loureiro, SusanaGlobal environmental changes are nowadays one of the most important issues affecting terrestrial ecosystems. One of its most significant expressions is the increasing ultraviolet radiation (UVR) arising from the human-induced depletion in ozone layer. Therefore, to investigate the effects of UVR on the terrestrial isopod Porcellionides pruinosus a multiple biomarker approach was carried out. Two experiments wer...