56 documents found, page 1 of 6
Ecological quality assessment of estuarine macrobenthic communities using an in...
Neves, Joana; Martins, Marta; Adão, Helena; Mil-Homens, Mário; Costa, Maria Helena; Lobo-Arteaga, JorgeMacrobenthic communities play a crucial role in the functioning of estuarine ecosystems and serve as bioindicators of environmental quality. This study assessed the ecological quality of an estuarine system using the AMBI and M-AMBI indices. The following parameters were considered: (i) environmental factors (total organic matter, organic carbon, grain size, calcium carbonate), (ii) sediment trace metals (Pb, Z...
Distribution patterns of benthic bacteria and nematode communities in estuarine...
Vieira, Soraia; Sroczy´nska, Kasia; Neves, Joana; Martins, Marta; Costa, Maria Helena; Adão, Helena; Vicente, Cláudia S.L.Benthic organisms are crucial in the regulation of the ecosystem functions. The interactions between benthic nematodes and sediment bacteria across divergent environmental conditions are poorly understood. The main goal of this study was to understand the spatial distribution patterns and diversity of benthic bacterial communities and nematode assemblages of the intertidal sediments in three sampling sites (Nav...
Effect of season and proximate composition on the Br, As, Cd and Pb contents in...
Ventura, Marta; Cardoso, Carlos; Bandarra, Narcisa Maria; Delgado, Inês; Coelho, Inês; Gueifão, Sandra; Martins, Marta; Costa, Maria HelenaOn the basis of a Total Diet Study, the Br, As, Cd and Pb contents in relevant food groups consumed in Portugal were determined. The studied groups were meat products, fatty fish, lean fish, shellfish, cephalopods, fresh and dried fruit, crucifers and other vegetables. It was observed that the concentrations of As, Br, Cd and Pb in fruit, vegetables and meat products were much lower than in seafood. Fresh fruit...
Bromine occurrence in Portuguese cabbage from center region of Portugal before ...
Ventura, Marta; Delgado, Inês; Coelho, Inês; Gueifão, Sandra; Matos, Ana Sofia; Martins, Marta; Costa, Maria Helena; Castanheira, IsabelBromine (Br) is one of the main halogens of the periodic table and has been classified as emerging contaminant due to its persistence in the environment, bio-magnification properties and risk to human health [1]. The main goal of this work was to evaluate Bromine contents in Portuguese cabbage (Brassica Oleracea var. Costata DC), in the center region of Portugal before and after forest fires. This vegetable is ...
Bromine, arsenic, cadmium, and lead in several key food groups: an assessment o...
Ventura, Marta; Cardoso, Carlos; Bandarra, Narcisa Maria; Delgado, Inês; Coelho, Inês; Gueifão, Sandra; Ribeiro, Mariana; Costa, Maria HelenaThis study endeavoured to provide an overview of the bromine, Br, arsenic (As, a metalloid) and metal (cadmium, Cd, and lead, Pb) relative risk associated with the consumption of relevant food groups (lean fish, fatty fish, bivalves, cephalopods, fresh fruit, dried fruit, and green vegetables) in Portugal. Though As, Cd, and Pb have been frequently studied, a comprehensive overview applying the same state-of-th...
Bromo, um contaminante de preocupação emergente em couve portuguesa
Ventura, Marta; Delgado, Inês; Coelho, Inês; Ribeiro, Mariana; Ferreira, Marta; Costa, Maria Helena; Castanheira, IsabelO bromo é um dos principais halogéneos da tabela periódica e tem vindo a ser classificado como contaminante de preocupação emergente, porque devido à sua bio-magnificação pode constituir um risco para a saúde humana. Os compostos bromados são contaminantes não biodegradáveis que se acumulam nos diferentes níveis tróficos da cadeia alimentar. O objetivo deste trabalho foi avaliar os teores de bromo em amostras d...
Contrasting morphological and DNA barcode-suggested species boundaries among sh...
Lobo, Jorge; Ferreira, Maria S.; Antunes, Ilisa C.; Teixeira, Marcos André Machado Lima; Borges, Luisa M. S.; Sousa, Ronaldo Gomes; Gomes, Pedro A.In this study we compared DNA barcode-suggested species boundaries with morphology-based species identifications in the amphipod fauna of the southern European Atlantic coast. DNA sequences of the cytochrome c oxidase subunit I barcode region (COI-5P) were generated for 43 morphospecies (178 specimens) collected along the Portuguese coast which, together with publicly available COI-5P sequences, produced a fina...
Emerging and persistent inorganic contaminants in prioritized foods: results fr...
Ventura, Marta; Coelho, Inês; Delgado, Inês; Gueifão, Sandra; Costa, Maria Helena; Castanheira, IsabelTotal diet studies (TDS) provide analytical data to estimate dietary exposure and risk assessment of contaminants. TDS were adopted by several European countries as the sound scientific basis for strength the linkage between food consumption and food analysis with the purpose to assess the effect of harmful substances on health. Heavy metals have been extensively studied and their effects on human health regula...
Toxicity of environmental pollutants: from the bench research to human biomonit...
Pinto, Miguel; Sacadura, Joana; Louro, Henriqueta; Costa, Pedro Manuel; Lavinha, João; Costa, Maria Helena; Caeiro, Sandra; Silva, Maria JoãoBeing subjected to diverse anthropogenic pressures, from industrial to agricultural activities, estuaries have long been regarded as ecosystems particularly sensitive to contamination. A recent study addressed the potential adverse effects of the Portuguese Sado river sediment contaminants on human and ecosystem health. Several complementary approaches were used to assess the effects on human health, including:...
DNA metabarcoding for high-throughput monitoring of estuarine macrobenthic comm...
Lobo, Jorge; Shokralla, Shadi; Costa, Maria Helena; Hajibabaei, Mehrdad; Costa, Filipe O.Morphology-based profling of benthic communities has been extensively applied to aquatic ecosystems’ health assessment. However, it remains a low-throughput, and sometimes ambiguous, procedure. Despite DNA metabarcoding has been applied to marine benthos, a comprehensive approach providing species-level identifcations for estuarine macrobenthos is still lacking. Here we report a combination of experimental and ...