Monitoring of phytobenthos was performed seasonally, on five locations of Montenegrin coast for the purpose of environmental monitoring. Locations with highest biodiversity were Budva and Stari Ulcinj, while the poorest one was Kotor. Regression of seagrass Posidonia oceanica was observed on the Krasici location.

A length-weight relationship (LW) for five cephalopod species, of which three decapod (Illex coindetii, Loligo vulgaris, Sepia officianlis) and two octopod species (Eledone cirrhosa, Eledone moschata) is given in this paper. The mean exponent b was found to be significantly lower than 3.

In this work physico-chemical and microbiological indicators of coastal waters of Boka Kotorska Bay were presented. As results these parameters of waters quality for mariculture were estimated, especially for breeding of high quality species: mussels-Mytilus galloprovincialis and oyster-Ostrea edulis. The data of primary production which is important for food chain for these organisms were presented. Investigated locations are suitable for mariculture which was requested from Public Enterprise Coastal zone. Temporary, higher eutrophic level was noticed as result of anthropogenic influence. The data are from one year period (2010- montly and seasonally intervals) by monitoring on 10 locations.

Sea urchin gametes, embryos and larvae can be used for quick, cheap and reliable screening and testing of pharmacologically active substances and pollutants. Effects of fecal pollution of Kotor Bay water and mercury in sediments and water of Risan Bay on embryonic development of spotted sea urchin (S. granularis), were examined. The results showed malformations, blockade of adhesion blastomeras and normal embryonic development. This distortion of development is about the suppression of the normal process of cortical granule exocytosis during activation reaction that starts fertilization, response Ring wave and increased level of free calcium ions in intimately membrane layer.

This paper presents results of wastewater examination from Belgrade sewerage system (BKS) which are discharged into the river Sava (Fair) and river Danube (Visnjica). Examinations were conducted within the project Eight monitoring spots and are compliant with European Directives concerning wastewater management. Project Eight monitoring spots consist of: continuous measurements of physical and chemical parameters (pH, temperature, redox potential and conductivity), sampling of wastewater during 24 hours, measuring flow rate and analyzing the quality of wastewater from monitoring places located at the discharges into rivers Sava and Danube. This paper shows examination results collected at two discharge points out of eight which are included in this project. The analysis of the quality and the quantity of wastewater sampled continuously during 24 hours, the effects of industrial pollution on them and total pollution load from these two collectors on the recipient is given.

After the year 2000 the issue of a water qualitative and quantitative monitoring increased in importance as a consequence of the provisions of the Framework Directive 2000/60/EC. In this context agriculture is required to use more efficiently the unconventional sources of water. In the enclosures located at the scientific bases from the Danube meadow during the vegetation period from April to September the natural risk factors alternate, being represented by the hydric excess, mainly generated by phreatic excess, and the deficit of humidity from June to August (14, 15). In these conditions the engineering works performed are complex, being required a sizing for mixt task 0 controlled discharge and supply (2, 3, 10, 13). For finding the volume of water resource which transits the drainage works and the capacity of transport it is required to be known first the flow of the absorbent drain.

Paper presents an overview of wastewater treatment systems with macrophytes. It is concluded that application of these systems in Mediterranean countries is feasible, especially for treatment of smaller and remote wastewater point sources.

The content of aluminum, boron, chromium, manganese, cobalt, nickel, copper, zinc, arsenic, cadmium, barium and lead was analyzed in raw water and drinking water that is used by the Belgrade Water Supply and Sewage Company. Total of 14 samples were examined from all water treatment plants that are part of the Belgrade Water Supply and Sewage. The measurements were conducted using the inductively coupled plasma-mass spectrometry (ICP-MS) technique. The aim of this research was to examine the effectiveness of the process of drinking water preparation in the existing plants. In all drinking water samples concentrations of the elements were bellow the maximum allowed levels according to the Serbian regulations. Correlation coefficients for the elements, which were analyzed in this paper, show that three groups of elements can be distinguished. Boron, manganese, arsenic and barium are related to each other and probably originate from the same source; copper, nickel and zinc have lower mutual correlation coefficients, indicating a potential common origin; finally, lead, aluminum and cadmium are not in correlation with any tested element.

This paper presents aquatic macroinvertebrate community composition at six investigated localities of Drina River. Sampling was performed during 2004. Field data together with characteristics of the community were used to estimate the status of the river. According to our results good water quality, within the limits of the 2nd category, was evaluated for Drina River.

Creation of scientific basis for rational use of water resources is impossible without studying viability of the microorganisms, their influence on the formation of chemical properties of natural waters and an explanation of the principles of biochemical processes such as transformation of elements in the aquatic environment. The survey of microbial (bacterial) characteristics of watercourses in the Republic of Srpska was conducted on a total of 64 streams within Operational, International and National surveillance monitoring. Sampling and analysis of samples was performed during the period from May to October. The study included ecological and sanitary aspects of river quality.