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Changes in the biocenoses composition and the Zapadna Morava midstream [Serbia (Serbia and Montenegro)] water quality trend
2005
Jurisic, I.(Osnovna skola Vozd Karadjordje, Jakovo (Serbia and Montenegro)) | Markovic, G.(Agronomski fakultet, Cacak (Serbia and Montenegro))
During several years of hydrobiological investigation of the Zapadna Morava river the Medjuvrsje and Stancici localities stood out; the most favourable water quality was registered with the Medjuvrsje reservoir (being constantly of the class 2), whilst, according to all the data obtained over the years, water quality of the Zapadna Morava at Stancici locality was the worts. The Medjuvrsje reservoir is in stable eutrophic phase. The saprobic index value points to a certain water quality improvement. Floristic diversity in the locality of Stancici increased over the years. An increase in the percental share of the oligosaprobity indicator indicates a certain organic load decrease and an improving water quality trend was recorded as indicated by lower saprobic index values.
Afficher plus [+] Moins [-]Characteristics of copepod plankton community in surface waters of Southern Adriatic
2004
Vukanic, D. | Vukanic, V.(Institut za biologiju mora, Kotor (Serbia and Montenegro))E-mail:vukanic@yahoo.com
Studies of the plankton copepods also included the area of continental shelf and the Southern Adriatic deep valley with pronounced ocean characteristics. The deep waters of Southern Adriatic are inhabited by numerous species of all depth zones, with a pronounced domination of ocean forms, similar to the Mediterranean. The quantity of copepods in the area of open surface waters shows a pronounced spring maximum of abundance. The abundance of overall copepod population decreases from the shore toward the open sea of Southern Adriatic valley, with an increase of species abundance in plankton. That area is governed by stenothermal and stenohaline conditions. The Copepoda community is characterized by stenothermic and stenohaline species. Ranges of many of these are not increased horizontally toward the northern parts of Adriatic, and the individuals carried north by water currents quickly die.
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