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Chlorophyll a and eutrophication in Kotor Bay [Adriatic sea, Montenegro] | Hlorofil a i eutrofikacija u Kotorskom zalivu [Jadransko more, Crna Gora]
2009
Krivokapic, S., Prirodno-matematicki fakultet, Podgorica (Montenegro). Studijski program za biologiju | Pestoric, B., Institut za biologiju mora, Kotor (Montenegro) | Drakulovic, D., Institut za biologiju mora, Kotor (Montenegro)
The weekly measurement of physico-chemical and biological parameters was done during the spring of 2008 in order to assess the level of eutrophication in the Kotor Bay. Chlorophyll a was used as trophic level indicator and its values varied from minimal 1.00 mg/cubic meter in June on the depth of 10 m to maximal 3.71 mg/cubic meter on the sea surface in May. According to Nixon criteria during investigation period it can be concluded that the area in question is oligotrophic. On the other hand, according to UNEP criteria which are somewhat stricter when the concentration of chlorophyll a is in question, Kotor Bay was mesoeutrophic area.
Afficher plus [+] Moins [-]Dynamics of nutrients on Montenegrin coast | Dinamika nutrijenata na crnogorskom primorju
2008
Joksimovic, D., Institut za biologiju mora, Kotor (Montenegro)
Content of nutrients in some protected areas in Vojvodina [Serbia]
2006
Maletic, S. (Univerzitet u Novom Sadu, Novi Sad (Serbia). Prirodno-matematicki fakultet), E-mail: snezanak@ih.ns.ac.yu | Dalmacija, B. (Univerzitet u Novom Sadu, Novi Sad (Serbia). Prirodno-matematicki fakultet) | Trickovic, J. (Univerzitet u Novom Sadu, Novi Sad (Serbia). Prirodno-matematicki fakultet)
During spring of 2005, referent monitoring of the chemical quality of surface waters and sediments in some protected areas in Vojvodina (Serbia) was conducted as a supplement to the Regular monitoring program. The aim of the study was to establish the chemical quality of surface waters and sediments regarding nutrient content. It is shown that the water quality satisfies the criteria of the 1st/2nd class according to our legislation, with the exception of the Ludos location, which showed a contamination with nitrogen matter in water and sediments. With regard to the contamination of water with phosphorus, almost all locations may be considered as potentially problematic.
Afficher plus [+] Moins [-][Nutrients determination in the river Tisza [Serbia] sediment during the period of 2004-2005]
2006
Crnkovic, N. (Republicki hidrometeoroloski zavod Srbije, Beograd (Serbia). Sektor zastite zivotne sredine, Laboratorija i Kvalitet voda) | Mijovic, S. (Republicki hidrometeoroloski zavod Srbije, Beograd (Serbia). Sektor zastite zivotne sredine, Laboratorija i Kvalitet voda)
Within the pollutant analysis in sediments the total organic carbon (TOC) content is determined, as well as nutrients such as nitrogen and phosphorus. In addition to this form carbon may be present as elemental or inorganic ones, as the crucial issue for sample preparation. Total phosphorus content was determined after sample digestion with sulphuric and perchloric acid. Organic nitrogen values were determined according the Kjeldahl method. Concentrations of TC, TOC, TIC, total P, organic N and total N in river Tisza sediment samples from sites Martonos, Novi Becej and Titel during 2004 and 2005 were presented.
Afficher plus [+] Moins [-]Nutrients and chlorophyll a dynamics in the inner part of Boka Kotorska Bay [Montenegro]
2006
Krivokapic, S. (Prirodno-matematicki fakultet, Podgorica (Montenegro). Studijska grupa za biologiju), E-mail: sladjana69@yahoo.com | Vuksanovic, N. (Institut za biologiju mora, Kotor (Montenegro)) | Stankovic, Z. (Prirodno-matematicki fakultet, Kragujevac (Serbia). Institut za biologiju i ekologiju)
Investigation of the nutrients and chlorophyll a concentrations, as indicators of trophic level, in the period from September 2003 to August 2004 in three sampling locations in the inner part of Boka Kotorska Bay varied widely. Nitrate concentration ranged from 0.0 to 2.42 mg/l at the surface and from 0.02 to 3.88 mg/l at the bottom, nitrate concentration from 0.02 to 0.21 mg/l at the surface and from 0.01 to 0.6 mg/l at the bottom, phosphate concentration from 0.03 to 0.18 mg/l at the surface and from 0.01 to 0.22 mg/l at the bottom, silicate concentration from 0.0 to 1.42 mg/l at the surface and 0.45 mg/l at the bottom respectively. Value of phytoplankton biomass, as represented by chlorophyll a, ranged from 1.02 to 8.68 mg/cubic meter and from 0.49 to 5.23 mg/cubic meter at the bottom. According to the UNEP criteria during the investigated period it can be concluded that the area in question is mesotrophic with the exception of December when it is eutrophic.
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