10th Symposium on the Flora of Southeastern Serbia and ...
10th Symposium on the Flora of Southeastern Serbia and ...
10th Symposium on the Flora of Southeastern Serbia and ...
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10 th <str<strong>on</strong>g>Symposium</str<strong>on</strong>g> <strong>on</strong> <strong>the</strong> <strong>Flora</strong> <strong>of</strong> Sou<strong>the</strong>astern <strong>Serbia</strong> <strong>and</strong> Neighbouring regi<strong>on</strong>s,Vlasina 17 to 20 June 2010Zavisnost mase perifit<strong>on</strong>a i primarne produkcije odsredinskih uslova u reci NišaviSavić, A.Department <strong>of</strong> Biology <strong>and</strong> Ecology, Faculty <strong>of</strong> Science <strong>and</strong> Ma<strong>the</strong>matics,University <strong>of</strong> Niš, <strong>Serbia</strong>Praćenjem dinamike primarne produkcije, kako u vremenskim odrednicamatako i duž toka reke, dolazimo do činjenica koje nam omogućavaju zaključivanje omnogim karakteristikama vodenih ekosistema. Ovim istraživanjem je, na osnovustepena primarne produkcije, zaključeno da veći deo reke nišave pripadaeutr<strong>of</strong>ičnom stepenu tr<strong>of</strong>ičnosti, dok znatno manji deo pripada eu-politr<strong>of</strong>ičnomstepenu. Veličina primarne produkcije određena je mnogim sredinskim faktorima. Uovom radu je razmatran uticaj k<strong>on</strong>centracije nutrijenata: ukupog fosfora i ukupnogazota na primarnu produkciju. Takođe je sagledano povećanje k<strong>on</strong>centracije ovihnutrijenata (aloht<strong>on</strong>og porekla) sa aspekta zagađenja ekosistema. Razmatran je uticajstepena radijacije na primarnu produkciju sa dva aspekta: stepen osenčenostiporeklom od riparijalne vegetacije i uticaj mere turbiditeta. Perifit<strong>on</strong>ska zajednica jetakođe razmatrana sa aspekta zavisnosti od k<strong>on</strong>centracije nutrijenata i stepenaprisutnosti stabilne podloge. Reka Nišava je istražena duž 151 km njenog toka utrajanju od godinu dana.Relati<strong>on</strong>ships between life forms <strong>and</strong> ecological indiced <strong>of</strong><strong>the</strong> flora in lake Provala (Vojvodina, <strong>Serbia</strong>)Nikolić, Lj., Čobanović, K., Nićin, S.Poljoprivredni fakultet u Novom Sadu, Srbijaljnik@polj.uns.ac.rsA several-year floristic study <strong>of</strong> Lake Provala <strong>and</strong> its riparian z<strong>on</strong>e wascarried out in <strong>the</strong> period 1996-2004. Presence <strong>of</strong> 65 vascular plants was registered in<strong>the</strong> course <strong>of</strong> <strong>the</strong> study. All <strong>of</strong> <strong>the</strong>se plant species bel<strong>on</strong>ged to <strong>the</strong> category <strong>of</strong>Magnoliophyta, <strong>of</strong> which 41 were in <strong>the</strong> class Magnoliopsida <strong>and</strong> 24 in <strong>the</strong> classLiliopsida. In this paper relati<strong>on</strong>ships are analyzed for <strong>the</strong> first time betweenecological indices (F, R, N, H <strong>and</strong> D) <strong>and</strong> <strong>the</strong> life forms <strong>of</strong> <strong>the</strong> vascular flora <strong>of</strong> <strong>the</strong>lake, which may serve as a reliable indicator <strong>of</strong> ecological c<strong>on</strong>diti<strong>on</strong>s prevailing in<strong>the</strong> investigated ecosystem. Starting from <strong>the</strong> hypo<strong>the</strong>sis that <strong>the</strong> development <strong>of</strong>certain life forms, in additi<strong>on</strong> to climatic c<strong>on</strong>diti<strong>on</strong>s, depends also <strong>on</strong> plantrequirements for major envir<strong>on</strong>mental factors, which are expressed via ecologicalindices, our intenti<strong>on</strong> was to establish <strong>the</strong> exact relati<strong>on</strong>ship between <strong>the</strong> two groups43
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