Changes in sediment and sediment interstitial water characteristics in Lake Fertő/Neusiedler See

Opuscula Zoologica Instituti Zoosystematici et Oecologici Universitatis Budapestinensis

关键词: Lake Fertő;    ion concentrations;    organic matter content;    macrophytes;   

DOI  :  

来源: DOAJ

【 摘 要 】

Changes in the C, S, N, P concentrations, organic matter content and electron transport system activity (ETS) of the sediment and in the NO2-, NO3-, PO43- SO42-, NH4+ concentrations of water and sediment interstitial water were studied in the Hungarian part of Lake Fertõ/Neusiedler See during the vegetation period. Sediment samples were collected in healthy and die-back reed stands and in the open water area from the 0-5 cm sediment layers. Organic matter content, C, N, S, P concentrations and ETS-activity were significantly higher in the sediment of the degraded reed stand. Higher electrical conductivity and SO42- concentration were found in the second part of the vegetation period, when the water level was lower. The seasonal variation in PO43- and NO3- concentrations of the surface water showed an antagonistic pattern. Higher PO43-and NH4+ concentrations were measured in the sediment interstitial water in summer, when the temperature and the decrease in SO42- concentration, which indicate the SO42- reduction processes, were greater. The higher ETS-activity values in September were probably due to the decaying mass of macrophytes.

【 授权许可】

Unknown