Water chemical properties around different vegetation types at Nyarias marsh, N.E. Hungary indicate substantial variation in levels of potassium, iron and phosphorus. The results suggest that potassium comes from decaying plant material, whilst iron and phosphorus come from the sediment. The latter seem to reflect subtle differences among the vegetation patches in water and sediment redox conditions. The results also suggest that other chemical elements (Na, Ca, Mg, S, Zn, Mn, Al, Pb, Cd) and pH proved far less important in discriminating between the water bodies. Spatial variation in potassium, iron and phosphorus in water may have important bearings for the whole marsh ecosystem through their widely recognised potential in controlling plant growth.
A. Tóth, M. Braun
Archiv Fur Hydrobiologie