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-Introduction.Among different fruit species, aronia have attracted a great attention because of its wide range of protective effects with potential benefits for human health. Furthermore, the consumption of products of aronia (juice, tea, berries) is becoming a part of a healthy lifestyle. Materials and Methods. The multi-element characterization of products of aronia has been carried out using inductively coupled plasma atomic emission spectrometry (ICP-AES). Results and Discussion. Among the major elements, the most abundant are K, Ca and P, followed by the Mg and Na. Fe, Zn, Mn, Cu, Bi and Si are the most abundant among the microelements. In terms of heavy metals (As, Cd, Pb), it can be concluded that the concentrations of them are below permissible levels (PLs) prescribed by national legislation in all samples. The chemometric techniques of principal component analysis (PCA) and cluster analysis (CA) were used to differentiation of products aronia according to their metal content. The application of PCA and CA was resulted in two clusters with similarities in the mineral composition. The first cluster includes tea bag samples (T1-T6). The second cluster includes berries (B1, B2), juices (J1-J4) and leaves (L). Conclusion. Data obtained in this study showed that analyzed products are potentially a rich source of some dietary metals such are K, Ca, P, Mg, Na, Fe and Zn. Obtained results could be also used as selection criteria for further use of products of aronia as a part of conventional diet.

Key-words:caddisfly, river, community structure, environmental factors, river continuum concept Monthly samples of caddisfly (Trichoptera) larvae were taken from ten localities along a 151 km long section of the Nišava River (eastern Serbia) during a one year study, with the aim to assessing the spatial composition of the caddisfly assemblage along the river gradient, to identify key environmental factors influencing its variability, to find out if caddisflies are suitable as biological indicators of water quality in this region, and to asses if the caddisfly assemblage in the river follows the river continuum concept. Twenty-three morphologically distinct taxa belonging to 14 genera were identified. The dominant family was Hydropsychidae with 70.34% of specimens examined, followed by Brachycentridae with 9.74% specimens. The longitudinal variability of the caddisfly assemblage has shown a clear dependence on physical and chemical parameters. The CCA analysis suggests that BOD 5 and concentration of total phosphorus are the most important factors in structuring the caddisfly assemblage. The species diversity was greatest at localities with the highest oxygen concentration and low nutrient levels. The caddisfly assemblage proved to be useful in identifying differences in environmental conditions in the Central Balkan region. RÉSUMÉ L'influence des facteurs environnementaux sur la structure des communautés de phryganes (trichoptères) dans la rivière Nišava (péninsule centrale des Balkans) Mots-clés :phryganes, rivière, Des échantillons mensuels de larves de phryganes (trichoptères) ont été préle-vés dans dix localités réparties dans un secteur long de 151 km de la rivière Nišava (Serbie orientale) au cours d'une étude d'un an, dans le but ; d'évaluer la composition spatiale de l'assemblage de phryganes le long de la rivière, d'identifier les principaux facteurs environnementaux qui influent sur sa variabilité, pour savoir si les trichoptères sont appropriés comme indicateurs biologiques de la qualité de l'eau dans cette région, et d'évaluer si l'assemblage de phryganes dans la rivière suit le concept de continuum fluvial. Vingt-trois taxons morphologiquement distincts appartenant à 14 genres ont été identifiés. La famille dominante était les Hydropsychidae avec 70,34 % des spécimens examinés, suivis par les Brachycentridae avec 9,74 % des spécimens examinés. La variabilité longitudinale de l'assemblage de phryganes a montré une dépendance claire des paramètres physiques et chimiques. L'analyse CCA suggère que la DBO 5 et la concentration de phosphore total sont les facteurs les plus importants dans la structuration de l'assemblage de phryganes. La diversité des espèces était la plus élevée dans des localités ayant la plus forte concentration d'oxygène et de faibles niveaux d'éléments nutritifs. L'assemblage de phryganes s'est avéré utile pour identifier les différences dans les conditions de l'environnement dans la région centrale des Balkans.