RT Journal Article ID 3c8892ee49622f7e A1 Krstic, Svetislav A1 Svircev, Zorica A1 Levkov, Zlatko A1 Nakov, Teofil T1 Selecting appropriate bioindicators regarding Water Framework Directive guidelines for freshwaters -a Macedonian experience JF International Journal on Algae JO IJA YR 2007 FD 2007-04-09 VO 9 IS 1 SP 41 OP 63 AB In light of WFD (Water Framework Directive) guidelines for freshwater monitoring, this paper addresses the suggested organisms to be used in regular biomonitoring systems. Based on critical observations and reported obstacles in applying the various developed methods, but also on long-term research on freshwater ecosystems in Macedonia, the best bioindicator organism is proposed. In order to have an overall assessment of the investigated ecosystem, biomonitoring organisms (such as fish, macrophytes) or geomorphology reveal important informations. But, if the target is rapid, reliable, and cost effective bioindication of the water quality (with algae and benthic invertebrates only) have a most comprehensive application in history. Accumulated evidence that using benthic invertebrates pose a problem in obtaining reliable results triggered a recent CEN's revision of their applicability in monitoring programs. Therefore, amid all critically addressed disadvantages, algae (benthic diatoms in particular) are recommented as the best solution and basic methodology given for being included in regular bioindication programs in rapid detection of water quality of lotic and lenthic freshwater environments. PB Begell House LK https://www.dl.begellhouse.com/journals/7dd4467e7de5b7ef,40d202df3ebb39f3,3c8892ee49622f7e.html