Hidrológiai Közlöny 2008 (88. évfolyam)

6. szám - IL. Hidrobiológus Napok: „A Balaton és vízrendszere – a Balaton-kutatás története” és „A Duna-kutatás története” Tihany, 2007. október 3–5.

146 HIDROLOGIAI KÖZLÖNY 2008. 88. EVF. 6. SZ. Köszönetnyilvánítás A munka elvégzését a Hortobágyi Nemzeti Park Igazgatóság, publikálását az OMFB-01491/2006, és a -01569 /2006 számú pályázata támogatta. Irodalom Bárdosi E., Nagy S., Dévai Gy., Grigorszky I., Kiss B., Végvári P., Bancsi I. 2000: Az oxigénviszonyok változatossága holtmedrek példáján. - Hidrológiai Közlöny 80(5-6): 275-277. Borics, G., Grigorszky, I., Padisák, J. (2002): Tisza- és Körös-menti holtágak dinoflagellátái - Hidrológiai Közlöny 82. 21-23. Dévai Gy., Végvári P., Nagy S., Bancsi I., 1999: Az ökológiai vizminősítés elmélete és gyakorlata. —Acta biol. Debrecina, Suppl. Oecol. hung. 10/: 216 pp European Comission. 2000. Directive 2000/60/EC of European parliament and of the Council establishing a framework for the Community action in the field of water policy. Official journal of the European Communities. L 327/1. Felfoldy L. 1987: A biológiai vízminősítés. In: Vízügyi hidrobiológia 16. - VGI, Budapest, 258 pp. Gőri Sz., Aradi Cs., Dévai Gy., Nagy S. 2000: Principles and methodology of integrated categorisation of water bodies and wetlands demonstrated on backwaters - In: L. Gallé - L. Körmöczi (Ed.): Ecology of River Valleys - TISCIA monograph series, Department of ecology, University of Szeged, Szeged, p. 91-97. Grigorszky I., J. Padisák, G. Borics, C. Schitchen and G. Borbély, (2003): Deep chlorophyll maximum by Ceratium hirundinella (O. F. Müller) Bergh in a shallow oxbow in Hungary. - Hydrobiologia 506-509: 209-212. M. K. Kiss, A. Tóth, M. Szabó, G. Lakatos 2006: Hydrobiological state of various oxbow lakes in Hungary. - Verh. Internat. Verein. Limnol., 29: 2267-2270. M. K. Kiss, Gy. Lakatos, G. Borics, Zs. Gidó, Cs. Deák 2003: Littoral macrophyte-periphyton complexes in two Hungarian shallow waters. - Hydrobiologia, 506-509: 541-548. Móra A., Bíró K., Csabai Z. 2004: Non-biting midges (Diptera: Chironomidae) from oxbows along the Hungarian section of the UpperTisza, with two new species to the Hungarian fauna. - Acta biol. Debrecina, Suppl. oecol. hung. 12: 27-34. Padisak J, Borics G, Feher G, Grigorszky I, Oldal I, Schmidt A, Zambone-Doma Z (2003): Dominant species, functional assemblages and frequency of equilibrium phases in late summer phytoplankton assemblages in Hungarian small shallow lakes. Hydrobiologia 502 (1-3): 157-168. Roijackers, R.M.M., Szabó, S., and Scheffer, M. (2004) Experimental analysis of the competition between algae and duckweed. - Archiv fur Hydrobiologie, 160,401-412. Speciár András, Bíró Péter, Tátrai István 2007: Tavaink halállománya az EU VKI görbe tükrében. - Hidrológiai Közlöny 87: 156-158. Szabó, S., Braun, M., Nagy, T., Balázsy, S. and Reisinger, O. 2000: Decomposition of duckweed (Lemna gibbá) under axenic and microbial conditions: flux of nutrients between litter water and sediment, the impact of leaching and microbial degradation. - Hydrobiologia 434: 201-210. Teszárné, N. M., Márialigeti, K., Végvári, P., Csépes, E., Bancsi, I. (2003): Stratification analysis of the Óhalász Ox-bow of the River Tisza (Kisköre Reservoir, Hungary), - Hydrobiologia Volume 506, Number 1, November 2003 , pp. 37-44(8) Is the nature conservation value and ecological state valuation reconcilable (on the basis of oxygen budget)? Nagy S. A. - Tóth, A. Department of Hidrobiology, University of Debrecen, H-4032. Debrecen Egyetem tér 1., Hungary Abstract: Keywords: During the hydroecological state estimation of aquatic and wetland habitats we have met several respect systems of value measuring. There is an attempt to determine nature conservation value in the level fixed by the current protection law or order while using a category system - sanctuary like, wise use, economic use - indicates value from the viewpoint of environmental management. If we approach the question from the viewpoint of nature conservation then we have to keep the valid orders of Hungarian Standard (MSZ) in each field of sampling, processing and valuing, at the same time there are more frequent attempts to apply the Water Frame Directive of European Union for valuing good ecological state and good ecological potential. However, diversity of living organisms and variety of their demands have no consideration for the rules applied by human and the values determined by different respects have discrepancy in many cases. In our paper we would like to show that paradoxical situation in the example of tracking the oxygen budget of the backwaters (Hordódi-Holt-Tisza, Háromágú, Szartos, Nagymorotva) located at the southeastern basin of Tiszavalk in Lake Tisza when the ecological state of the water body considered to be the most valuable from the viewpoint of nature conservation was the worst out of the four areas while the ecological state of the water body considered to be the less valuable from the viewpoint of nature conservation was the best. ecological state, value of nature conservation, Lake Tisza, backwaters, oxygen budget. Klossy Irén alkotása