29 documents found, page 1 of 3
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 ...
Macroinvertebrate communities reveal regional asymmetries in riverine ecosystem...
Santos, Joana Isabel; Silva, Carlos; Gonçalves, Fernando J. M.; Pereira, Joana Luísa; Castro, Bruno B.Published: 29 December 2023; 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)] ...
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 ...
Cyanobacteria as candidates to support mars colonization: growth and biofertili...
Macário, Inês P. E.; Veloso, Telma; Frankenbach, Silja; Serôdio, João; Passos, Helena; Sousa, Clara; Gonçalves, Fernando J. M.; Ventura, Sónia P. M.Cyanobacteria are indicated as organisms that can possibly support Mars colonization, contributing to the production of oxygen and other commodities therein. In this general context, the aim of this work was to evaluate the ability of three species of cyanobacteria (Anabaena cylindrica, Nostoc muscorum, and Arthrospira platensis) and a green microalga (Chlorella vulgaris) to grow using only the resources existi...
A review on polycyclic aromatic hydrocarbons distribution in freshwater ecosyst...
Jesus, Fátima; Pereira, Joana L.; Campos, Isabel; Santos, Martha; Ré, Ana; Keizer, Jacob; Nogueira, António; Gonçalves, Fernando J. M.; Abrantes, NelsonPolycyclic aromatic hydrocarbons (PAHs) are a group of organic compounds, found ubiquitously in all environmental compartments. PAHs are considered hazardous pollutants, being of concern to both the environmental and human health. In the aquatic environment, PAHs tend to accumulate in the sediment due to their high hydrophobicity, and thus sediments can be considered their ultimate sink. Concurrently, sediments...
Cyanobacteria as Candidates to Support Mars Colonization: Growth and Biofertili...
Macário, Inês P. E.; Veloso, Telma; Frankenbach, Silja; Serôdio, João; Passos, Helena; Sousa, Clara; Gonçalves, Fernando J. M.; Ventura, Sónia P. M.Cyanobacteria are indicated as organisms that can possibly support Mars colonization, contributing to the production of oxygen and other commodities therein. In this general context, the aim of this work was to evaluate the ability of three species of cyanobacteria (Anabaena cylindrica, Nostoc muscorum, and Arthrospira platensis) and a green microalga (Chlorella vulgaris) to grow using only the resources existi...
Are cyanobacteria a nearly immortal source of high market value compounds?
Macário, Inês P. E.; Veloso, Telma; Fernandes, Andreia P. M.; Martins, Margarida; Frankenbach, Silja; Serôdio, João; Gonçalves, Fernando J. M.BACKGROUND: When the human population increases, so does the need to explore a wider range of feedstocks and biomasses, such as cyanobacteria. However, a deeper understanding of the growth patterns and pigment production is required to support the selection of the most beneficial species and conditions for industrial production. The growth and pigment production (i.e., chlorophyll a and C-phycocyanin) of three ...
Enzymes as useful biomarkers to assess the response of freshwater communities t...
Gonçalves, Ana M. M.; Rocha, Carolina P.; Marques, João C.; Gonçalves, Fernando J. M.The lack of specificity of pesticides used for control of various organisms, even if efforts have been made to design formulations more species-specific, produce harmful effects on non-target organisms. Oxidative stress and lipid peroxidation are amongst the main known effects induced by pesticide exposure, besides eventual lethal toxicity, endangering organisms’ biomembranes integrity or compromising their act...
Fatty acids as suitable biomarkers to assess pesticide impacts in freshwater bi...
Gonçalves, Ana M. M.; Rocha, Carolina P.; Marques, João C.; Gonçalves, Fernando J. M.The toxic effects associated to pesticides have been for long a concern in terms of environmental and human safety. The recognition of the limitations of numerous, if not all, pesticides in terms of species-specificity, toxicity level, persistency in the environment, influencing its runoff and transport ability, among other characteristics, have been the subject of numerous studies over the years. These have es...