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DISTRIBUTION OF YEASTS AND FILAMENTOUS FUNGI IN POLLUTED AND NON POLLUTED STREAMS OF DOURO BASIN, NE PORTUGAL
Abstract
Water samples of 5 sites belonging to 3 streams of Douro River Basin (Portugal, NE) were analyzed regarding their hydrogeochemical and microbiological parameters. Two of the studied streams (Corgo and Pinhao) were strongly influenced by agricultural practices and construction pressures while the other stream (Olo) has low human impact. The study was conducted during 2.5 years, in winter and summer. Physicochemical characterization of water samples from Olo stream show very low mineralization (Electrical Conductivity – EC – between 9 and 13 $\mu$S/cm), with pH range 4.7 to 6.6. Higher mineralization (22 0.05) obtained in the same season. Fungi, both moulds and yeasts, seemed to respond to changes in water column which in turn are influenced by anthropogenic pressure, geologic characteristics and weather.
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References12
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