Hidrológiai Közlöny 2002 (82. évfolyam)

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

26 HIDROLÓGIAI KÖZLÖNY 2002. 82. ÉVF. - A tápelem koncentrációja nő a dekompoziciós idő alatt, a koncentrációnövekedés okozói: 1.) a tömeg csökkenés 2.) a mikrobiális tevékenység valamint a mikrobák megtelepedése a dekomponálódó anyag felületén. - Az ETS-aktivitás változás összefüggést mutat a tömegváltozással, tükrözi a bomlás sebességét. Irodalom Armstrong, J., Armstrong, W., Beckett, P. M., Halder, J. E., Lythe, S., Holt, R., Sinclair, A. 1996: Pathways of aeration and the mechanism and beneficial effects of humidity and ventury induced convections in Phragmites australis (Cav.) Trin. ex Steud - Aquat Bot. 54, 177-197. Andersen , F 0., 1978: Effects of nutrient level on the decomposition of Phragmites communis Trin..- Arch. Hydrobiol., 84, 42-54. Baerlocher, F., Biddiscombe, N. R. 1996: Geratology and decomposition of Typha latifolia and Lythrum salicaria in a freshwatwr marsh .- Arch. Hydrobiol 136/3 3,9-325. Björk, S. 1972: Swedish lake restoration program gets results. - Ambio 1: 153-165 Davis, C.B, Van der Valk, A. G. 1977: The decomposition of standing litte of Typha glauca and Scirpusfluviatilis. - Can. J. Bot. 662-675. De Busk, T. A., Dieberg, F. E. 1984: Effect of nitrogen and fiber content on the decomposition of the wateryacinth (Eichhornia crassipes mart. Solms). - Hydrobiologia, 118, 199-204. Eiland F., Klamer, M., Lind, A. M , Leth, M., Baath, E. 2001: Influense of initial C/N ratio on chemical and microbial Composition during Long term composting of straw. - Microb. Ecol. 41, 272-280. Esteves, F. Barbieri, R. 1983: Dry weight and chemical changes during decomposition of tropical macrophytes in Lobo reservoir. - Aquat. Bot. Sao Paulo, Brazil. 16, 185-186. Gessner, M O. 2000: Breakdown and nutrient dynamics of submerged Phragmites shoots in the littoral zone of a temperate hardwater lake - Aquatic Botany 66. 9-22. Heitz, P. 1992: Decomposition and nutrient dynamics of reed (Phragmites australis (Cav.) Trin ex.Steud) litter in Lake Neusiedl, Austria - Aquatic Botany. 43. 211-230. Harmon, E. M., Nadeihoffer, K. J., Blair, J M 1999: Measuring decomposition, nutrient turnover, and stores in plant litter. 202-240. In Robertson, G. P., Coleman, D. C., Bledsoe C. S., Sollins P (eds) Standard soil methods for long term ecological research Kaushik, N. K, Hynes, H B. N 1968: Experimental study on the role of autumn shed leaves in aquatic environments. - J. Ecol 56. 229243. Kaushik, N. K, Hynes, H. B. N 1971: The fate of dead leaves that fall into streams. - Arch Hydrobiol. 68, 465-515. Kuehn. K. A., Gessner, M.O., Wetzel, R. G., Suberkopp, K. 1999: Decomposition and CÖ2 evolution from standing litter of the emergent macrophyte Eryanthus giganteus - Microb. Ecol. 38, 50-57. Mason, C. F., Bryant, R. J 1975: Production, nutrient content and decomposition of Phragmites communis Trin and Typha angustifolia L. -Journ. of Ecol. 63, 71-95. Nicholas, V., Polunin, V C. 1982: Processes contributing to the decay of reed (Phragmites australis) litter in freshwater. - Arch. Hydrobiol. 94, 182-209. Ostendorp, W. 1993: Schilf als Lebensraum. - Beih. Veröff. Naturschutz Landschaftpflege Bad.-Württ. 68, 173-280. Pieczynska

, E 1993: Detritus and nutrient dynamics in the shore zone of lakes: a review. - Hydrobiologia 251, 49-58 Poide-Neiff, A. Neiff, J. J. 1989: Dry weight loss andcolonization by invertebrates of Eichhornia crassipes litter under anaerobic conditions. -Trap. Ecol., 302,30/2 175-182. Rodewald-Rudescu, L. 1975: Das Schilfrohr - Die Binnengewässer, vol. 27. Schweizerbart. Stuttgart Triska, F. J., Sedell, J R., 1976.decomposition of four soecies of leaf litter in response to nitrate manipulation. -Ecology 57, 783-792 Twilley, R. 1985: Biomass production and nutrient cycling in aquatic macrophyte communities of Chowan river, North Carolina. -Aquatic Botany 22.: 231-253. Varga, I. 2001: Macroinvertebrates in Reed Litter - VII Decomposition of Organic Matter in Standing Waters. - Inter Rev. Hydrobiol 4-5 : 573-583. Köszönetnyilvánítás E munka az EU-EUREED projekt (IC-CT96-0020/CT960020A2) és az AKP támogatás segítségével jött létre. Decomposition of reed (Phragmites australis) organs at Lake Fertö/Neusiedler See Dinka, M,., Szabó, E. Abstract:. In situ reed decomposition was examined at Lake Fertö/Neusiedler See (Hungary) using litter bag method. The phytomass and nutrient concentration changes in the the samples, the ETS-activity of decomposig reed rhizome were investigated over the period of study. Leaf and rhizome decomposition rates were similar in the water, and decomposed 3-5 times hihger than the culm. Culm decomposition was 1,5 times faster in water than in air. The leafand rhizome mass, nutrient content decreased faster than in the culm. The nutrient concentration increased during the decomposition period, which can be explained by mass decrease and the colonization of the the surface of decomposing material by microbes. The ETS-activity changes were i connection with dry mass content and it also reflect the to the decomposition rate of reed rhizome Keywords: decomposition, mass change, nutrient content (C, N, S, P), ETS-activity, Lake Fertö/Neusiedler See.