58 documents found, page 1 of 6
Macroinvertebrate communities reveal regional asymmetries in riverine ecosystem...
Santos, Joana Isabel; Silva, Carlos; Gonçalves, Fernando J. M.; Pereira, Joana Luísa; Castro, Bruno B.Climate change has been increasing the frequency and severity of drought periods. There is a need to understand how this water scarcity affects aquatic communities. The main aim of this work was to compare the macroinvertebrate communities and their bioindicator value (ecological status sensu the Water Framework Directive) in three Regions [northeast (N), central (C) and south (S)] of Portugal along a water ava...
Uma amêijoa (asiática) de sucesso: atividades experimentais com Corbicula fluminea
Abreu, Gonçalo; Pascoal, Érica; Monteiro, Leandro; Mantas, Diogo; Pereira, Joana Luísa; Jesus, FátimaA amêijoa Corbicula fluminea, vulgarmente conhecida como amêijoa asiática, é um bivalve invasor de água doce. À semelhança de outros bivalves, a amêijoa asiática apresenta uma elevada taxa de filtração, o que constitui uma caraterística interessante e que pode ser facilmente avaliada em contexto de ensino. Neste artigo são propostas duas atividades experimentais que se baseiam nesta caraterística. A primeira at...
Potential effects of the discharge of wastewater treatment plant (WWTP) effluen...
Silva, Carlos; Santos, Joana Isabel; Vidal, Tânia; Silva, Susana; Almeida, Salomé Fernandes Pinheiro; Gonçalves, Fernando José Mendes; Abrantes, NelsonWastewater treatment plant (WWTP) effluents can be sources of environmental contamination. In this study, we aimed to understand whether effluents of three different WWTPs may have ecological effects in riverine recipient ecosystems. To achieve this, we assessed benthic phytobenthos and macroinvertebrate communities at three different locations relative to the effluent discharge: immediately upstream, immediate...
Redox homeostasis disclosed in the saltmarsh plant Halimione portulacoides upon...
Pereira, Patrícia; Pereira, Joana Luísa; Marques, Ana; Marques, Carlos; Brandão, Fátima; Cesário, Rute; Frankenbach, Silja; Serôdio, JoãoThe saltmarsh plant Halimione portulacoides was shortly exposed to realistic levels of inorganic mercury (iHg) with the aim of investigating the adaptative processes of the roots and leaves regarding redox homeostasis, physiology, and Hg accumulation. Plants were collected at a contaminated (CONT) and a reference (REF) site to address the interference of contamination backgrounds. The influence of major abiotic...
Horizontal migration of zooplankton in lake–wetland interfaces. Can temperature...
Pereira, Joana Luísa; Lopes, Ana Sofia; Silva, Júlia; Vidal, Tânia; Abrantes, Nelson; Santos, Daniela; Brito, Moisés; Ferreira, Rui M. L.Lake ecology can be affected by exchange flows driven by horizontal temperature gradients in lake–wetland interfaces. In this work, we investigate the hypothesis that thermally driven flows modulate the horizontal migration patterns of freshwater zooplankters. A 48-h field campaign in a shallow lake (Lake Vela, Quiaios, Portugal) was carried out to test this hypothesis. Thermal differences between the littoral ...
History of exposure to copper influences transgenerational gene expression resp...
Jeremias, Guilherme; Muñiz-González, Ana-Belén; Gonçalves, Fernando José Mendes; Martínez-Guitarte, José-Luis; Asselman, Jana; Pereira, Joana LuísaThe establishment of transgenerational effects following chemical exposure is a powerful phenomenon, capable of modulating ecosystem health beyond exposure periods. This study assessed the transgenerational effects occurring due to copper exposure in the invertebrate D. magna at the transcriptional level, while evaluating the role of exposure history on such responses. Thus, daphnids acclimated for several gene...
Do Freshwater and Marine Bivalves Differ in Their Response to Wildfire Ash? Eff...
Jesus, Fátima; Mesquita, Filipa; Virumbrales Aldama, Elisa; Marques, Ana; Gonçalves, Ana M. M.; Magalhães, Luísa; Nogueira, António J. A.; Ré, AnaWildfires constitute a source of contamination to both freshwater and marine ecosystems. This study aimed to compare the antioxidant defense response of the freshwater clam Corbicula fluminea and the marine cockle (Cerastoderma edule) to wildfire ash exposure and the concomitant metal body burden. Organisms were exposed to different concentrations (0%, 12.5%, 25%, 50%, and 100%) of aqueous extracts of Eucalypt ...
Macroinvertebrate community structure and ecological status in Portuguese strea...
Santos, Joana Isabel; Silva, Carlos; Goncalves, Fernando J. M.; Pereira, Joana Luísa; Castro, Bruno B.Climatic and hydrological variation is of utmost importance in regions of the globe facing water scarcity and river intermittency (e.g. areas under Mediterranean influence). The main aim of this study was to compare the macroinvertebrate community structure and its bioindicator value (i.e. waterbody ecological status) in streams from three Portuguese regions (Regions C, N and S), representing distinct climatic ...
Do Freshwater and Marine Bivalves Differ in Their Response to Wildfire Ash? Eff...
Jesus, Fátima; Mesquita, Filipa; Virumbrales Aldama, Elisa; Marques, Ana Margarida; Gonçalves, Ana M M; Magalhães, Luísa; Nogueira, António J A; Ré, AnaWildfires constitute a source of contamination to both freshwater and marine ecosystems. This study aimed to compare the antioxidant defense response of the freshwater clam Corbicula fluminea and the marine cockle (Cerastoderma edule) to wildfire ash exposure and the concomitant metal body burden. Organisms were exposed to different concentrations (0%, 12.5%, 25%, 50%, and 100%) of aqueous extracts of Eucalypt ...
A review of the order mysida in marine ecosystems: What we know what is yet to ...
Oliveira, Ana Filipa; Marques, Sónia Cotrim; Pereira, Joana Luísa; Azeiteiro, Ulisses MirandaMysids have a high ecological importance, particularly by their role in marine food chains as a link between the benthic and pelagic realms. Here we describe the relevant taxonomy, ecological aspects such as distribution and production, and their potential as ideal test organisms for environmental research. We also highlight their importance in estuarine communities, trophic webs, and their life history, while ...