Hidrológiai Közlöny 2006 (86. évfolyam)
6. szám - XLVII. Hidrobiológus Napok: Vizeink élővilágát érintő környezeti változások Tihany, 2005. október 5–7.
158 HIDROLÓGIAI KÖZLÖNY 2006. 86. ÉVF. 6. SZ. Irodalom Gorzó, Gy. 1991. Az üledékkotrás technológiájának meghatározása. Vízügyi Közlemények, LXXni. Évfolyam. 184-194. Overmann, J., H. van Gemerden, 2000. Microbial interactions involving sulfur bacteria: implications for the ecology and evolution of bacterial communities. FEMS Microbiol. Rev. 24: 591-599. Reskóné, N. M., Borsodi, A. K. 2003. Long-term investigations on the changes of the MPN values of bacterial communities in the sulphur -cycle in Lake Velencei, Hung. Hydrobiologia 506-509. 715-720. Rodina, G. A. 1972. Methods in aquatic microbiology. University Park Press. Baltimore -Butterworth and Co. Ltd., London. 329-349. Spring, S., R. Schulze, J. Overmann és K. H. Schleifer 2000. Identification and characterisation of ecologically significant prokaryotes in the sediment of freshwater lakes: molecular and cultivation studies. FEMS Microbiol. Rev. 24: 573-590. Quality of basin sediment and characteristics of microbial communities in lake Balaton M. N. Reskóné, A. Alföldi, G. Kiss, Zs. Balogi, E. M. Tóth, A. Borsodi Abstract: Since 1998 KDT KTVF has regularly been doing sediment examinations based on analytical measurements along the whole length of Lake Balaton. There is an accumulated reliable knowledge about the nutrient content of the basin sediment, however the characterization of bacterial communities involved in transformation and mineralization is still missing. We attempt to make up for this lack by our widespread examinations using upper layers of basin sediments from five sampling points along the lake. We have analyzed the composition and dominance relations of bacterial communities playing an important role in the nutrient cycle using methods based on both culturing and chemotaxonomy. The hygienic state of the lake has also been studied. We have examined the presence of static cyanobacteria (e.g. Cylindrospermopsis raciborskii) in the sediment. Based on our results we concluded that the four basins of the lake did not show any difference concerning the total phosphor, the BAP values and the number of thiosulphate oxidisings linked to sulphur cycles. Based on the number of bacteria with endospores the most rich region in nutrients is the sediment of the Zala-estaurine and the Keszthely basin. The amount of hygienic pollution of basin sediment is negligible. The results of culturing independent microbial methods with the participation of mainly chemoorganotrophic bacterial stems important in mineralization (e.g. Bacillus, Aeromonas, Leptospira and Spirochaeta) show a high degree of similarity between sampling points. The sediment contains the spores of Cylindrospermopsis raciborskii in a very low concentration. Keywords: Balaton, eutrofication, sediment, nurtients, BAP, bacterial communities, MPN, Cylindrospermopsis raciborskii. Klossy Irén alkotása (Fametszet, Magyar tájak sorozat)
