QUANTITATIVE PRESENCE of Macropirytes in BASIC CHANNEL NETWORK of HYDROSYSTEM DANUBE - TISZA - DANUBE
TISCIA28,25 23. QUANTITATIVE PRESENCE OF MACROPIryTES IN BASIC CHANNEL NETWORK OF HYDROSYSTEM DANUBE - TISZA - DANUBE M. Vudkovid,S. Stojanovii, Z. Stankovii,M. Zderii,P. Kilibarda, Lj. Radakand S. Radulovii Vutko|ii, M., Stoja o"ic, 3., Stankovii, Z.,Zdetic, M., Kilibarda, P., Ratlak, Lj. and Rarlulowc, S. (1994): Quantitatil,e prcsence of mac,aphytes itl basic cha let ,rctuo* af Hldlosystent Dan|be'Tisra " Danube.- Tiscia28, 25-28. Abstract. Quantitativepresence of aqualic vascularplants is given at certain sectionsof Hydrosyst€mDanube - Tisza - Danubein Backarchannels Vftas - Bezdan,Backi Petrovac- Karavlrkovoand Jegricka. Among submerg€d plants which e not rooted,species Ceftltophyllw denetstrtt is the most fr€quentin all sections.From subnergedplants that are rooted, b,tiaphrlln spicatu,nsnd Vdlisneriaspimlis h^ve the gr€atestquantitative presence. Floating non rootedhydrophytes are smrll floatingflowering plants and waler ferns. Spi,odela poltrhin, Lenna gibba, Sah,inianatdns and Azolla ceohtiara havehigh coverage values at certninspots. From grcupoffloating rootedbydrophytes, mosl numerousare napa nata t, Nylrphaeaalba, Nuphar l*eun ^nd Nyutphoides$a,ra. Due to greal surfaceand big floating leaves,they are coverioglarge areas of watermirror, especially in channelvrbas - Bezdan.Among numerous emergedmacrophytes giving coastzone of all channels,highest panicipalion is of PhruEniles co n t.]', TrphuatE|stifoltu andGlrcoia n'arnll,a.It is con€ludedthrt differencesin florislic siruclureand quantitative presence ofvafious lif€ fonnsofaquatic plants in investigatedsection! of HydrosystemDarube ' Tiszn- Danubeare due to differentage ofchann€ls (30 to 200 years), differenlpbysico-chenical conditions of aquaticenvironment, purpose functions of chanlels, poilutiondegree and application of differentprotection measures. Keyrords: Hydrosysten Da tbc - Tiszd - Da,,rtbe, hydrcph),ta,Jlotistic sbuctne, ecalosicctl grc ps, quantit ti'e ptesence.
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