Waters around the Barreiro/Seixal Industrial Complex loc in the Tagus Estuary, near Lisbon (38° 40'N,9° 05'W), Portugal PROJECT: Industrial impact assessment on the Tagus estuary - Barreiro/Seixal Industrial Complex

Fauna abundance per unit area of the bed; Sediment grain size parameters; Dissolved metal concentrations in the water column; Particulate metal concentrations in the water column; Nutrient concentrations in sediment pore waters; Nitrate concentration parameters in the water column; Nitrite concentration parameters in the water column; Phosphate concentration parameters in the water column; Redox potential in sediment; Silicate concentration parameters in the water column; Temperature of the water column; Zooplankton taxonomy-related abundance per unit volume of the water column; Zoobenthos taxonomic abundance; Zooplankton non taxonomy-related abundance per unit volume of the water column; Zoobenthos taxonomy-related counts; Phytoplankton generic abundance in water bodies; Concentration of organic matter in sediments; Alkalinity, acidity and pH of the water column; Concentration of organic matter in water bodies; Dissolved trace metalloid and inorganic selenium concentrations in water bodies; Particulate trace metalloid and inorganic selenium concentrations in water bodies; Zoobenthos generic abundance; Phytoplankton taxonomic abundance in water bodies

Plankton nets; discrete water samplers; sediment grabs

The Barreiro/Seixal Industrial Complex is the biggest industrial area in the Tagus estuary. Many industrial effluents are discharged into the waters without treatment. Monthly samples over a year were taken, 14 stations were sampled, (surface and bottom), for the physico-chemical, bacterial and phytoplankton study, and 8 for the zooplankton and the ichthyoplankton studies. 21 stations were sampled during June to September 1989 for heavy metals. The sedimentary and macrozoobenthic characterization were made during May/July 1989 where 29 stations were sampled. The results have shown that some physico-chemical parameters (total suspended solids, dissolved oxygen, oils, lead and mercury) were higher than those refer in the Portuguese quality standards; equally the bacterial parameters are above the Portuguese quality standards but only at some stations. The planktonic component (phyto, zoo and ichthyoplankton) was stressed, with low diversity indices. The benthic communities were poor in species. Those areas presented organic enrichment and, in extreme cases, practically no species were sampled. These results point to a disturbed area.

Duarte, M.F., Henriques, F., Karmali, S., Marques, P. and Anastaci P. (1991) Caracterizacao Fisico-Quimica das Aguas do Complexo Industrial Barr - Seixal 1989/90. Coordenacao cientifica de M. Constanca Peneda. DEII 5/91, Publicacao LNETI: 54pp + Anexos., ; Bordalo Costa, M.M., Barreiros, M.A. and Garcia, H.M. (1991) Metais Pesados n Aguas do Estuario do Rio Tejo Constrangidas pelo Complexo Industrial do Barrei Seixal 1989/90. Coordenacao cientifica de M. Constanca Peneda. DEII 6/91, Publicacao LNETI: 14pp., ; Baeta-Hall, L. (1991) Caracterizacao Microbiologica das Aguas receptoras do Complexo Industrial do Barreiro - Seixal 1989/90., Coordenacao cientifica de M. Constanca Peneda. DEII 7/91, Publicacao LNETI: 57pp + Anexos.; Duarte, A.P. (1991) Estudo do Ictioplancton das Aguas do Estuario do Rio Tejo Constrangidas pelo Complexo Industrial do Barreiro/Seixal 1989/90. Coordenacao cientifica de M. Constanca Peneda. DEII 8/91, Publicacao LNETI: 39pp., ; Quintino, V. and Rodrigues, A.M. (1991) Diagnostico do Estado de Qualidade do Ambiente Biosedimentar Subtidal do Estuario do Rio Tejo: Barreiro - Seixal. Coordenacao cientifica de M. Constanca Peneda. DEII 9/91, Publicacao LNETI: 59,

National Institute of Engineering and Industrial Technology, Lisbon, Department of Industrial Impact Studies
Estrada do Paço do Lumiar, 22
Lisboa

1649-038
Portugal