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Modeling trophic webs in freshwater fishpond systems using Ecopath: towards bet...
Aubin, J; Baizeau, V; Jaeger, C; Roucaute, M; Gamito, SofiaFreshwater pond polyculture faces many challenges in Europe. Appropriate tools must be developed to better understand and manage trophic interactions in pond ecosystems. The objective of our study was to understand the trophic interactions and make inference on the fish diet in common carp polyculture through a combination of experiments and trophic web modeling. We conducted an experiment in small fishponds of...
Integrated multi-trophic aquaculture systems: energy transfers and food web org...
Gamito, Sofia; Quental-Ferreira, H; Parejo, A; Aubin, J; Christensen, V; Cunha, METhree Ecopath models were built to reproduce 3 experimental treatments carried out in earthen ponds located in Olhao, southern Portugal, to understand the energy transferred and the ecosystem state in integrated multi-trophic aquaculture (IMTA). These earthen ponds behave as simplified ecosystems or mesocosms, with well-defined borders, where the relationships between trophic groups can be described through eco...
Understanding the individual role of fish, oyster, phytoplankton and macroalgae...
Cunha, M. E.; Quental-Ferreira, H.; Parejo, A.; Gamito, Sofia; Ribeiro, L.; Moreira, Márcio; Monteiro, I; Soares, F.; Pousao-Ferreira, P.In order to demonstrate that IMTA can be profitable and a good alternative to regular semi-intensive fish mariculture production in earthen ponds three different production treatments with distinct combinations of trophic levels were designed: (i) a combination of fish, filter feeders, phytoplankton and macroalgae, (ii) fish, filter feeders and phytoplankton and (iii) fish, phytoplankton and macroalgae, to eval...
Vindicating the biological and socioeconomic importance of coastal lagoons and ...
Marcos, Concepcion; Gamito, Sofia; Umgiesser, Georg; Perez-Ruzafa, AngelThe European Congress on Coastal Lagoons celebrates this year 2018 its fifteen years of existence. Its first edition, in November 2003 in Ferrara (Italy), under the slogan “The Influence of River Basin-Coastal Zone Interactions”, opened a series of actions and opportunities that have been consolidated in the biannual celebration of this meeting, the creation of the Euro-Mediterranean Federation on Coastal Lagoo...
Phyto- and zooplankton dynamics in two ICOLLs from Southern Portugal
Gamito, Sofia; Coelho, Susana; Perez-Ruzafa, AngelFoz do Almargem and Salgados are two small, intermittently closed and open lakes and lagoons (ICOLLs) located in the Portuguese southern coast, both remaining isolated from the sea throughout great part of the year. Based on environmental and biotic parameters, the first lagoon was classified as mesotrophic, with a greater marine influence, while the second one was classified as hypereutrophic. The plankton rel...
Methodology for assessing the individual role of fish, oyster, phytoplankton an...
Cunha, M.E.; Quental-Ferreira, H.; Parejo, A.; Gamito, Sofia; Ribeiro, L.; Moreira, M.; Monteiro, I.; Soares, F.; Pousão-Ferreira, PedroProduction costs in extensive and semi-intensive fish culture in earthen ponds are often too high to offer sustainable economic activity due to the low productivity of these systems. The right combination of commercial finfish species with inorganic (primary producers) and organic extractive (bivalves) species in Integrated MultiTrophic Aquaculture (IMTA) create a balanced system with higher profitability and r...
Trends in water quality and subtidal benthic communities in a temperate estuary...
Veríssimo, Helena; Lane, Michael; Patrício, Joana; Gamito, Sofia; Marques, João CarlosThe analysis of temporal patterns in water quality and benthic assemblages in estuaries constitutes an important methodological issue for discriminating the effects of natural and anthropogenic pressures. Temporal trends in water quality and in the subtidal benthic community over a 5-year interval in the Mondego estuary (Portugal) were investigated with the aim of assessing changes in environmental quality as a...
The importance of habitat-type for defining the reference conditions and the ec...
Gamito, Sofia; Patrício, Joana; Neto, João M.; Marques, João Carlos; Teixeira, HelianaCoastal lagoons are complex systems, with considerable habitat heterogeneity and often subject to high temporal dynamics, which constitutes a great challenge for ecological assessment programs. For defining reference conditions for benthic invertebrates, under the EU Water Framework Directive objectives, historical data from the Ria Formosa leaky lagoon (wet surface area of about 105 km2) located in Southern Po...
Integrated assessment of bioerosion, biocover and downwearing rates of carbonat...
Moura, Delminda; Gabriel, Selma; Gamito, Sofia; Santos, Rui; Zugasti, Estibaliz; Gomes, A.I.; Tavares, Ana Mafalda; Martins, Ana LuísaBioerosion on rocky shores has been frequently reported as an important mechanism in coastal evolution, with less attention focussed on determining the bioprotective role organisms may have in mediating coastal erosion. This work aims, for the first time, to provide an integrated assessment of both traversing microerosion meter (TMEM) downwearing rates and activity of intertidal organisms on two carbonate shore...
Feeding diversity index as complementary information in the assessment of ecolo...
Gamito, Sofia; Patrício, Joana; Neto, João M.; Teixeira, Heliana; Marques, João CarlosThe feeding diversity of macroinvertebrates from the estuary of Mondego was estimated with Shannon–Wiener complementary evenness following the methodology presented in Gamito and Furtado (2009. Ecological Indicators, 9: 1009-1019). Results were compared with those from BAT (Benthic Assessment Tool; Teixeira et al., 2009. Marine Pollution Bulletin, 58: 1477-1786) applied to the same data set, obtained from sampl...