The quality of water of the Mantovo reservoir, Republic of Macedonia

The aim of the paper is to evaluate the quality of water of the Mantovo Reservoir (Southeast Macedonia)based on physico-chemical parameters and the macrozoobenthos. Monthly sampling was performed during 2003 and 2004. Temperature and DO depth profile data indicate that the Mantovo Reservoir is a dimictic lake. Based on mean nutrient concentrations, the Mantovo Reservoir can be considered as being phosphorus-deficient. During the summer stratification, very high concentrations of Mn (2,819 ?g/l)and Cu (147.6?g/l)were detected in the lower profundal. Limnodrilus hoffmeisteri was the dominant species, which indicates the presence of organic pollution. Dominance of Chaoborus crystallinus and decline in abundance of L. hoffmeisteri in the lower profundal indicate a deterioration of environmental status in the deepest part of the lake. Cilj rada je bio da se proceni kvalitet vode akumulacije Mantovo (jugoistocna Makedonija)na osnovu fizicko-hemijskih parametara i vodenih makrobeskicmenjaka. Vrseno je mesecno prikupljanje uzoraka tokom 2003. i 2004. Podaci o temperaturi i rastvorenom kiseoniku po profilima indikovali suda je Mantovo dimikticka akumulacija. Na osnovu koncentracije nutrijenata, Mantovo se moze okarakterisati kao akumulacija sa deficitom fosfora. Tokom letnje stratifikacije, izmerene su vrlo visoke vrednosti mangana (2819 ?g/l)i bakra (147.6?g/l)u donjem profundalu. Limnodrilus hoffmeisteri je bio dominantna vrsta, sto ukazuje na prisustvo organskog zagadjenja. Dominacija vrste Chaoborus crystallinus, uz opadanje abundance L. hoffmeisteri u donjem profundalu, indikuje pogorsanje statusa u najdubljem delu jezera.