Hidrológiai Közlöny 2002 (82. évfolyam)

XLIII. Hidrobiológus Napok: "Vizeink ökológiai állapota: természetvédelem, vízhasznosítás" Tihany, 2001. október 3-5.

122 HIDROLÓGIAI KÖZLÖNY 2002. 82. ÉVF. Hejs, S. K., Azzoni, R, Ciordani, G., Jonkers, H. M. , Nizzoli, D., Viaroli, P., Gemerden, H. (2000): Sulfide-induced release of phosphate from sediments of coastal lagoons and the possible relation to the dissappearance of Ruppia sp -Aqut. Microb. Ecol. 23. 85-95. Henriksen, K., Kemp, M (1998): Nitrification in estuarine and coastal marine sediments. In. T. H. Blackburn, J. Sorensen (eds.) - Nitrogen cycling in coastal marine environments

. Wiley 201-249. Mann, C. J., Wetzel, R. G. (2000): Effects of emergent macrophyte Juncus effusus L. On the chemical composition of interstitial water and bacterial productivity.- Biogeochemistry 48 307-322. Nixon, S W, Kelly, J. R , Furnas, B. M, Oviatt, C. A., Hale, S. S. (1980): Phosphorus regeneration and the metabolism of coastal marine bottom communities. In: K. R. Tenore el B. C. Coull (eds): Marine Benthic Dynamics. Univ. S. Carolina Pr, Columbia, SC. 219-242. Phillips, G. L. (1977): The mineral nutrient levels in three Norfalk Broads differing in trophic status, and on annual mineral content budget for one of them. - J. Ecol. 65, 447-474. Rysgaard, S„ Risgaard-Petersen, N., Sloth. N. P. (1996): Nitrification denitrification, and nitrate ammonification in sediments of two coastal lagoons in Southern France. - Hydrobiologia 329, 133-141. Szabó, E. (2001): Az intersticiális viz fizikai és kémiai tulajdonságai a Fertő nádasában. - Hidrológiai Közlöny 81. Évf. 5-6 sz 468-470. Takúts, T„ Berczik, Á„ Dinka, M. (1997): The effect of hydrobiological and meteorological conditions on the water chemistry of a shallow lake. - Verh. Internat Ver. Limnol. Vol 26 :392-396. Tresh, J. C., E. V.

, Suckling, J. E. Beale (1944): The examination of water supplies London Wetzel, R. G. (1975): Limnology. W. B. Saunders Comp., Philadelphia Seasonal changes in i:he phisico-chemical characteristics of the interstitial water Szabó, E. , Dinka M. Abstract: Seasonal changes in the phisico-chemical characteristics of the surface water and the sediment interstitial water were studied in the Hungarian part of Lake-Fertő /Neusidler See Interstitial water samples were collected in healthy and die-back reed stands and the open water area from the 0-5 cm sediment layers. The pH, conductivity, redoxipotential and temperature of the water and intersitial water were measured in situ with a Hydrolog 2100 field equipment The CI", N0

2\ NO]', PO»

1' SO<

2", Na\ K*, Mg

!\ Ca

2*, NH

4\ concentrations were determined with a Dionex DX-120 ionchromatograph. Electrical conductivity, pH, CI", Na\ K*, Mg

2*, Ca

2*, NH/, concentration increased from March to September, the highest increase was observed in the die-back reed stand with shallow water and high organic matter content. Changes in the phisico-chemical characteristics of the surface water and the interstitial water were related to water level fluctuation, meteorological conditions and the ammounts of accumulated organic matter. Knowing the range of phisico-chemical characteristics in the sediment interstitial water we can predict pathways of biochemical processes (NOs'and SO4

2 reduction, nitrification and denitrification processes etc.) occuring in sediment. Keywords: interstitial water, phisico-chemical characteristics, seasonal changes, shallow lake