Environmental characterization of lake ecosystems located in Serbo Macedonian massif (FYRM)

Dolenec, Tadej and Serafimovski, Todor and Lojen, Sonja and Dolenec, Matej and Tasev, Goran and Kramar, Sabina and Rogan Šmuc, Nastja and Vrhovnik, Petra (2015) Environmental characterization of lake ecosystems located in Serbo Macedonian massif (FYRM). In: Biomineralization: From Fundamentals to Biomaterials & Environmental Issues (Key Engineering Materials). Trans Tech Publications Ltd , Churerstr. 20, 8808 Pfaffikon, Switzerland, pp. 295-311. ISBN 978-3-03835-591-5

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This mineralogical, geochemical and isotopic characteristics of recent lacustrine sediments, of Anodonta cygnea shells and of fish species Rutilus rutilus dojranensis from the Lake Dojran (FY Republic of Macedonia, southern part of the Serbo-Macedonian Massif (SMM)), which provide indirect evidence regarding biomineralization and calcification processes as well as various geological problems. Environmental pollution can seriously impair physiological functions such as the secretion of carbonate material into the shells. For comparison, sediments and fish species Vimba melanops from the Lake Kalimanci, located in northern part of the SMM, were also included into the study. X-ray powder diffraction (XRD), inductively coupled plasma mass spectrometry (ICP-MS) and carbon (C) and oxygen (O) stable isotope analyses were performed, and thereupon enrichment factor (EF) values were calculated. The XRD results revealed close association of sediment mineralogy with the prevailing metamorphic, volcanic and igneous rocks of the region surrounding both lakes (Dojran and Kalimanci). According to the EF value results, surficial Lake Dojran sediments are slightly enriched with Co, Cr, Cu, Pb, and Zn, moderately enriched with Au, Ni and Sb, moderately to severely enriched with Au, severely enriched with Sb and extremely enriched with As. This elemental enrichment originates from various geogenic (geological background and polymetallic mineralization) and anthropogenic (tourism, traffic, coatings, untreated wastewater discharge and agrochemicals) sources. Calculated EF revealed that surficial sediments from Lake Kalimanci are extremely enriched with Pb, Zn, and Cd, meanwhile As and Cu shows very severe enrichment. Comparing to Lake Dojran, calculated EF is much higher in Lake Kalimanci than in Dojran. Stable isotope signature results showed that Lake Dojran sediments were strongly influenced by evaporation effect. Their δ18O values range from -5.60 to +1.49 ‰ and the δ13CVPDB composition range from -6.45 to -1.65 ‰. Shells of A. cygnea are mainly composed of mineral aragonite and their δ18O values varies between 0.43 ‰ and +1.94 ‰, and δ13CVPDB between -2.48 to -1.72 ‰. δ18O signature in shells might be explained by precipitation of the carbonate from isotopically heavier oxygen lake water. The unusually high skeletal oxygen suggests calcification at elevated temperature and evaporation. Analyses also identify particularly high levels for Cr, Hg, Ni and Pb in fishes (V. melanops) and frog (Rana temporaria) samples from Lake Kalimanci with mean values [μgkg-1]: 1090 – 6.5, 339 – 117, 567 – 5100 and 1127 – 435, respectively. Meanwhile, the contents of Cr, Hg, Ni and Pb in fishes samples (R. rutilus dojranensis) from Lake Dojran are a bit lower [μgkg-1]: 2320, 1690, 700 and 50.

Item Type: Book Section
Subjects: Natural sciences > Biological sciences
Natural sciences > Chemical sciences
Natural sciences > Earth and related environmental sciences
Divisions: Faculty of Natural and Technical Sciences
Depositing User: Goran Tasev
Date Deposited: 14 Oct 2015 10:29
Last Modified: 14 Oct 2015 10:29
URI: http://eprints.ugd.edu.mk/id/eprint/13976

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