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[online models]
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back to top DATABASES

GEM has amassed data about several estuarine systems over the course of the projects it has been involved in. Data are mainly water quality, bathymetry, and substance distribution maps interpolated from surfaces. Study systems are located in many parts of the world. Some of these data are available online for research purposes.

Tagus Estuarine Salt Marshes Image Database

This site contains GEM's collection of image data for the Tagus estuary and its salt marshes, including estuarine bathymetry and water quality, remote sensing data, and salt marsh zonation and density. All images are GIS interpolations of point sampling data.


back to top ONLINE MODELS

GEM has made available information online through the use of models running in real-time, and according to user requests. This methodology makes available to the general public some useful resources in oceanography.

TideP_logo.gif (6710 bytes) On-line Tide Predictor

The Oceanus 2000 oceanographic table software has been made available for on-line use. This version allows the user to create several oceanographic tables, including gas solubility and  tide predictions; data can be obtained in graphic or table formats.



The scientific activity developed within GEM has led to the publication of papers in refereed journals, by members of the research group. The full text of selected recent papers is provided on-line for browsing only; all material is copyrighted by the journal publishers.

J. G. Ferreira, A. M. Nobre, T. C. Simas, M. C. Silva, A. Newton, S. B. Bricker, W. J. Wolff, P.E. Stacey, A. Sequeira, 2005. A methodology for defining homogeneous water bodies in estuaries – Application to the transitional systems of the EU Water Framework Directive. Estuarine, Coastal and Shelf Science, In Press.
J.G.Ferreira, W.J.Wolff, T.C.Simas, S.B.Bricker, 2005. Does biodiversity of estuarine phytoplankton depend on hydrology? Ecological Modelling, 187(4) 513-523.
A.M.Nobre, J.G.Ferreira, A.Newton, T.Simas, J.D.Icely, R.Neves, 2005. Management of coastal eutrophication: Integration of field data, ecosystem-scale simulations and screening models. Journal of Marine Systems, 56 (3/4), 375-390.
Newton, A., Icely, J.D., Falcão, M., Nobre, A., Nunes, J.P., Ferreira, J.G., Vale, C., 2003. Evaluation of Eutrophication in the Ria Formosa coastal lagoon, Portugal. Continental Shelf Research, 23, 1945-1961.
Tett, P., Gilpin, L., Svendsen, H., Erlandsson, C.P., Larsson, U., Kratzer, S., Fouilland, E., Janzen, C., Lee, J., Grenz, C., Newton, A., Ferreira, J.G., Fernandes, T., Scory, S., 2003. Eutrophication and some European waters of restricted exchange. Continental Shelf Research, 23, 1635-1671.
Bricker, S.B., J.G. Ferreira, T. Simas. An Integrated Methodology for Assessment of Estuarine Trophic Status. Ecological Modelling, 169(1), 39-60.
Alvera-Azcarate, A., Ferreira, J.G., & Nunes, J.P., 2003. Modelling eutrophication in mesotidal and macrotidal estuaries. The role of intertidal seaweeds. Estuarine, Coastal and Shelf Science, 57(4), 715-724.
Nunes, J.P, Ferreira, J.G., Gazeau, F., Lencart-Silva, J., Zhang, X.L, Zhu M.Y. & Fang J.G., 2003. A model for sustainable management of shellfish polyculture in coastal bays. Aquaculture, 219/1-4,  257-277.
Macedo, M. F., Duarte, P., Ferreira, J. G., 2002. The influence of incubation periods on photosynthesis-irradiance curves. J. Exp. Mar. Biol. Ecol. vol 274/2, 99-118.
Simas, T., Ribeiro, A.P. & Ferreira, J.G., 2001. SHRIMP - A dynamic model of heavy metal uptake in aquatic macrofauna. Environmental Toxicology and Chemistry, 20, Nº 11 - 2649-2656.
Macedo, M.F., Duarte, P., Mendes P., and  J.G. Ferreira, 2001. Annual variation of environmental variables, phytoplankton species composition and photosynthetic parameters in a coastal lagoon. Journal of Plankton Research. Vol. 23 No. 7, 719 - 732
Simas, T., Nunes, J.P. & Ferreira, J.G., 2001. Effects of global climate change on coastal salt marshes. Ecological Modelling. 139 (1), 1-15.
Macedo, M. F., Duarte, P., Ferreira, J. G., Alves, M. &Valentina  C., 2000. Analysis of the deep chlorophyll maximum across the Azores Front. Hydrobiologia, 441 (1/3), 155-172.
Ferreira, J.G., 2000. Development of an estuarine quality index based on key physical and biogeochemical features. Ocean & Coastal Management, 43/1, 99-122.
Monvoisin, G., Bolito, C. & Ferreira, J.G., 1999. Fish dynamics in a coastal food chain, simulation and analysis. Oceanography of the Iberian Continental Margin. Boletin Instituto Español de Oceanografía Nº15 (1-4). 431-440.
Macedo, M.F., Ferreira, J.G. and Duarte, P., 1998. Dynamic behaviour of photosynthesis-irradiance curves determined from oxygen production during variable incubation periods. Mar. Ecol. Prog. Series, 165, 31-43.
Ferreira, J.G., Duarte, P. and Ball, B., 1998. Trophic Capacity of Carlingford Lough for Aquaculture - Analysis by Ecological Modelling. Aquatic Ecology Vol. 31, 4, 361-378.
Bacher, C., Duarte, P., Ferreira, J.G., Héral, M. and Raillard, O., 1998. Assessment and comparison of the of the Marennes-Oléron Bay (France) and Carlingford Lough (Ireland) carrying capacity with ecosystem models. Aquatic Ecology Vol. 31, 4, 379-394.
M.L. Carvalho, J. G. Ferreira, P. Amorim, M.I.M. Marques and M.T. Ramos, 1997. Study of heavy metals and other elements in macrophyte algae using energy-dispersive x-ray fluorescence. Environmental Toxicology and Chemistry, Vol. 16, N. 4, 807-812.
Duarte, P. & Ferreira, J.G., 1997. Dynamic modelling of photosynthesis in marine and estuarine ecosystems. Environmental Modelling and Assessment, 2, 83-93.
Duarte, P. and Ferreira, J.G., 1997. A model for the simulation of macroalgal population dynamics and productivity. Ecological Modelling, 98, 199-214.
Duarte, P. and Ferreira, J.G., 1995. Seasonal adaptation and short-term metabolic responses of macroalgae to varying light and temperature. Mar. Ecol. Prog. Series, 121, 289-300.
Ferreira, J.G., 1995. EcoWin - An object-oriented ecological model for aquatic ecosystems. Ecol. Modelling, 79, 21-34.