SGEM GeoConferences Library

DISTRIBUTION OF YEASTS AND FILAMENTOUS FUNGI IN POLLUTED AND NON POLLUTED STREAMS OF DOURO BASIN, NE PORTUGAL

AUTHOR/S: M. LOPES, A. SAMPAIO, M. DO ROSARIO COSTA, R. M. CORTES
Sunday 1 August 2010 by Libadmin2009

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 2, 495-502 pp

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 μS/cm), with pH range
4.7 to 6.6. Higher mineralization (22 (4.5

<7.8)>

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.

Keywords: fungi, yeast, pollution, water chemistry, mineralogy