**9. Acknowledgments**

Many colleagues and contributors, as a part of the full team, have added their invaluable research data for achieving the final results. Among them, most important contributions for the purpose of this chapter have been made available by Prof.dr.Ivan Blinkov (GIS), Prof.dr.Ordan Cukaliev (agriculture), Prof.dr.Trajce Stafilov (heavy metals), Dr.Marina Talevska (macrophytes), Dr.Trajce Talevski (fish), Miss Mr. Radmila Bojkovska (priority substances), Mr. Valentina Slavevska (zoobenthos). The research has been conducted under the UNDP funded project "Development of Prespa Lake Watershed Management Plan", RF. 50/2009, Contract No. 31/2009, lead by Mr. Teodor Conevski. The author is fully obliged to all contributors.
