15 documents found, page 1 of 2
Behavioural Responses of Cerastoderma edule as Indicators of Potential Survival...
Verdelhos, T.; Veríssimo, H.; Marques, J.C.; Anastácio, P.M.According to climate change scenarios the incidence of extreme events, such as flooding, is expected to increase worldwide. In the current climate change context, understanding behavioural responses of marine species to such stressors is essential, especially for species of high ecological and economic interest such as bivalves, which can be quite useful for future management and conservation actions. In this s...
Ecosystem response to different management options in Marine Protected Areas (M...
Ferreira, A.; Alves, A.S.; Marques, J.C.; Seixas, S.Marine Protected Areas (MPA) can be powerful coastal management tools with several specific goals, although there is debate concerning their effectiveness. There is no consensus regarding the ideal size of MPAs, and actually there is some evidence that perhaps size is not as critical as other specific factors in determining their success in terms of populations’ protection and ecological functions conservation. On...
Brain as a target organ of climate events: Environmental induced biochemical ch...
Vieira, R.; Marques, S.M.; Neto, J.M.; Barría, P.; Marques, J.C.; Gonçalves, F.J.M.; Gonçalves, A.M.M.The present study aims to examine physiological and biochemical response of three commercial fish species (Dicentrarchus labrax; Platichthys flesus and Solea solea), over contrasting environmental dynamics: an extremely dry (2012) and flood (2014) years, in a shallow temperate southern European estuary, the Mondego Estuary (Portugal). Physiological and biochemical biomarkers were evaluated by a principal compon...
Effects of dietary exposure to herbicide and of the nutritive quality of contam...
Silva, M. Bessa da; Abrantes, N.; Rocha-Santos, T.A.P.; Duarte, A.C.; Freitas, A.C.; Gomes, A.M; Carvalho, A.P.; Marques, J.C.; Gonçalves, F.Risk assessment of pesticides has been based on direct toxic effects on aquatic organisms. Indirect effects data are taken into account but with limitations, as it is frequently difficult to predict their real impacts in the ecosystems. In this context the main aim of this work was to assess how the exposure to the herbicide pendimethalin (Prowl®), under environmentally relevant concentrations, may compromise t...
Effects of dietary exposure to herbicide and of the nutritive quality of contam...
Silva, M. Bessa da; Abrantes, N.; Rocha-Santos, T.A.P.; Duarte, A.C.; Freitas, A.C.; Gomes, Ana M. P.; Carvalho, A.P.; Marques, J.C.; Gonçalves, F.tRisk assessment of pesticides has been based on direct toxic effects on aquatic organisms. Indirect effectsdata are taken into account but with limitations, as it is frequently difficult to predict their real impactsin the ecosystems. In this context the main aim of this work was to assess how the exposure to theherbicide pendimethalin (Prowl®), under environmentally relevant concentrations, may compromise the...
Ecological quality assessment of transitional waters based on fish assemblages:...
Cabral, H.N.; Fonseca, V.F.; Gamito, R.; Gonçalves, C.I.; Costa, J.L.; Erzini, K.; Gonçalves, J.; Martins, J.; Leite, L.; Andrade, J.P.; Ramos, S.The assessment of water quality has changed markedly worldwide over the last years, especially in Europe due to the implementation of the Water Framework Directive. Fish was considered a key-element in this context and several fish-based multi-metric indices have been proposed. In this study, we propose a multimetric index, the Estuarine Fish Assessment Index (EFAI), developed for Portuguese estuaries, designed...
Benthic meiofauna as indicator of ecological changes in estuarine ecosystems: T...
Alves, Ana Sofia; Adão, Helena; Ferrero, T.; Marques, J.C.; Costa, M. J.; Patricio, J.Estuarine meiofauna communities have been only recently considered to be good indicators of ecological quality, exhibiting several advantages over macrofauna, such as their small size, high abundance, rapid generation times and absence of a planktonic phase. In estuaries we must account not only for a great natural variability along the estuarine gradient (e.g. sediment type and dynamics, oxygen availability, t...
Spatial distribution of subtidal Nematoda communities along the salinity gradie...
Adão, Helena; Alves, A.; Patricio, J.; Neto, J. M.; Costa, M. J.; Marques, J.C.of two Portuguese estuaries exposed to different degrees of anthropogenic stress: the Mira and the Mondego. The nematode communities were mainly composed of Sabatieria, Metachromadora, Daptonema, Anoplostoma, Sphaerolaimus and Terschellingia species, closely resembling the communities of Northern European estuaries. In both estuaries, nematode density and community composition followed the salinity gradient, na...
On the relevance of freshwater nematodes for ecological assessment in transitio...
Alves, Ana; Adão, Helena; Marques, J.C.Nematoda is the most common group of organisms in the meiobenthic assemblages of freshwater and marine systems and, in Portugal, its distribution has been studied along the estuarine gradient of two estuaries. Nematodes are recognized as good indicators of anthropogenic impacts in aquatic ecosystems and, together with the taxonomic data, the inclusion of functional diversity can create a powerful tool, providin...
Do nematode and macrofauna assemblages provide similar ecological assessment in...
Patrício, Joana; Adão, Helena; Neto, J. M.; Alves, Ana; Traunspurger, Walter; Marques, J.C.Do nematode and macrofauna assemblages provide similar ecological assessment information? To answer this question, in the summer of 2006, subtidal soft-bottom assemblages were sampled and environmental parameters were measured at seven stations covering the entire salinity gradient of the Mondego estuary. Principal components analysis (PCA) was performed on the environmental parameters, thus establishing differ...