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Comparing analysis of chlorophyll 'a' and phaeophytin 'a' concentrations in Palic lake [Serbia, Serbia&Montenegro]
2003
Camprag, N. | Lehoczki, I. (Zavod za zastitu zdravlja, Subotica (Serbia and Montenegro))
This work show and compare results of chlorophyll 'a' and phaeophytin 'a' concentrations during three years systematic examination. The samples were collected from the fourth sector of Palic lake, ones a month, during 2000, 2001, and 2002 using method by Szilagyi. Comparing values, a great seasonic changes of chlorophyll 'a' and phaeophytin 'a' concentrations is noticed.
اظهر المزيد [+] اقل [-]The content of photosynthetic pigments in plankton in "Djerdap 1" and "Djerdap 2" reservoirs [Serbia, Serbia&Montenegro]
2003
Obradovic, V. | Janac, M. (Institut za vodoprivredu "Jaroslav Cerni", Beograd (Serbia and Montenegro))
In the period October 2001 through November 2002 in six series parallely with physico-chemical and hydrobiological analyses, the content of photosynthetic pigments was determined in algae in the region of flow-through reservoirs of "Djerdap 1" and "Djerdap 2" on the profiles of Smederevo, Ram, Veliko Gradista, Donji Milanovac, Tekija, Kladovo and Radujevac. The samples were taken by a pump from the river midstream at the depth of 1-0 m (composite sample), while in the vegetation period April, June and September, the samples were taken at the depth of 5 m. The peak concentration of chlorophyll-a, the biological indicator of trophic condition, was recorded in the month of April in the Smederevo profile (30.2 mg/cubic meter) at the depth of 1-0 m. The lowest values of chlorophyll-a in all studied cycles were recorded in the Radujevac profile (below the dams) with the mean annual value of 1.8 mg/cubic meter. Chlorophyll-c occurs as the subdominant photosynthetic pigment. Values of chlorophyll-c were higher than chlorophyll-a in the month of June on the Donji Milanovac profile in the analysed sample taken at the depth of 5 m. Higher values of chlorophyll-b were recorded in the course of the vegetation period in the month of June on the profiles of Smederevo, Ram, Veliko Gradiste and Donji Milanovac at the depth of 1-0 m.
اظهر المزيد [+] اقل [-]Chlorophyll a and eutrophication conditions in Kotor bay [Adriatic sea, Montenegro (Serbia and Montenegro)]
2005
Krivokapic, S.(Prirodno-matematicki fakultet, Podgorica (Serbia and Montenegro). Studijska grupa za biologiju) E-mail:sladjana69@yahoo.com | Vuksanovic, N. | Stankovic, Z.
Eutrophicationn problems in the Kotor bay were studied monthly from September 2003 to August 2004. As a result of nutrient enrichment (directly dependent on human activities), phytoplankton growth was very intensive, reflected by high concentration of chlorophyll a (7.46 mg/cubic m).
اظهر المزيد [+] اقل [-]Qualitative and quantitative phytoplankton composition of the Slatina near Opovo [Serbia (Serbia and Montenegro)]
2004
Subakov-Simic, G.(Univerzitet u Beogradu, Beograd (Serbia and Montenegro). Bioloski fakultet)E-mail:gsubak@bfbot.bg.ac.yu | Plemic, N. | Karadzic, V. | Cvijan, M. | Krizmanic, J.
The puddle Slatina is the old meander of the river Tamis. It is periodically fill with moderate salt and high alkaline (pH 9) water. During our investigation it was determined 65 algal taxa from 5 divisions. Qualitative analysis points out on the domination of Cyanophyta, Euglenophyta and Chlorophyta, while quantitative analysis indicate the dominance of Cyanophyta. During spring 2003, total number of algae was 1.026 x 10**6 cel/l. High values of chlorophyll a (20 microgram/l) and total number of algae, as well as low transparency point out the progressive eutrophication.
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