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Heavy metals contents in selected plant species from lake Cerknica

Tjaša Dernikovič (2014) Heavy metals contents in selected plant species from lake Cerknica. Diploma thesis.

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    Abstract

    Cerknica lake is the largest intermittent lake in Slovenia that lies on karst surface in the heart of Notranjska. Cerknica field and its different habitat types were formed due to floods and dry periods of the lake. Size of the lake can grow up to 26 square kilometres - such a large area is exposed to various natural and anthropogenic factors affecting the structure and functioning of the ecosystem. Heavy metals represent less than 0,1 % of the Earth's crust, but some of them are necessary for the successful growth and development of organisms. They are called essential nutrients which are present in the soil in very low concentrations. If they occur in excessive concentrations they become toxic and cause adverse effects on organisms. In this case we consider such areas polluted with heavy metals. We analysed the concentrations of heavy metals in soil and selected plants at different locations on the Cerknica field. We have chosen a location along a busy road, fertilized lawn and lawn which is not exposed to anthropogenic influences. Based on the obtained results we demonstrated that the concentrations of individual elements vary depending on location and also depend on the plant species. Critical emission values were not excided on any of the sampled locations, so we can conclude that the sampled locations are not polluted by heavy metals.

    Item Type: Thesis (Diploma thesis)
    Keywords: Cerknica lake, pollution, heavymetals
    Number of Pages: 30
    Language of Content: Slovenian
    Mentor / Comentors:
    Mentor / ComentorsIDFunction
    doc. dr. Katarina Vogel MikušMentor
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=search&base=50126&select=(ID=10183497)
    Institution: University of Ljubljana
    Department: Faculty of Education
    Item ID: 2384
    Date Deposited: 22 Sep 2014 12:08
    Last Modified: 22 Sep 2014 12:08
    URI: http://pefprints.pef.uni-lj.si/id/eprint/2384

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