The aim of this study was to assess wheather the Crno jezero (Black Lake) could be designated as a site possessing specific reference conditions of a glacial lake in the Dinaric Western Balkan ...ecoregion. The results of a Lake Habitat Survey (LHS), analysis of macrophytes and a basic water quality assessment indicate that the lake is in a near pristine state, particularly with regard to its hydromorphological status, and that it fulfills the requirements of High Ecological Status (HES), as set by the Water Framework Directive. However, to confirm these preliminary findings, an integrated assessment of the ecological and chemical status, using other biological quality elements and a full set of physico-chemical parameters, is necessary.
Biological invasions represent one of the defining features of the Anthropocene, causing major problems and incurring significant economic losses worldwide, which are only projected to increase in ...the future. Riparian zones, as critical transition zones, despite providing numerous ecosystem services, are exposed to a multitude of human pressures, making them highly vulnerable to plant invasions. In fact, in Europe, riparian areas are considered to be among the most vulnerable habitat types. As foci of invasive plant species richness, they play an important role in the process of their spread into nearby terrestrial ecosystems. Various disturbance events, both natural (i.e. floods) and artificial (e.g. hydro-morphological alterations), in addition to a strong propagule pressure these areas are subjected to, increase the invasibility of these vulnerable zones. Given their ecological importance and susceptibility to plant invasions, the preservation and restoration of riparian zones is especially important in light of climate change. In order to preserve and restore the ecosystem services and biodiversity of riparian areas, invasive alien plants have to be managed. The success of restoration measures and control activities can be affected by many variables, such as the invasive plants' residence time and their legacy effects. Furthermore, different environmental factors and drivers of invasion must also be considered, as they could potentially impair the restoration measures. Finally, a successful restoration effort depends on the inclusion of all the relevant stakeholders and their understanding of the importance of preventing and managing plant invasions.
The aim of this investigation was to establish the presence or absence of chemical contamination of water and the litoral zone (banks) of Danube-Tisza-Danube (DTD) canal system. The investigation ...covered the canal section form Bezdan to Prigrevica. By analyzing the chemical composition of dominant aquatic species in four locations of the section, we defined the species with the highest capacity to accumulate nutrients and heavy metals. Concentrations of P and K as well as of a beneficial element Na in the tissues of the analyzed macrophytes were both species- and site-dependent. The highest accumulation was registered for Ceratophyllum demersum while the species Elodea canadensis showed increased P and K accumulation values in the location Sombor. The lowest concentrations of almost all heavy metals were recorded near Sombor, indicating that the section suffered the lowest chemical pollution. The highest concentrations of all of the analyzed heavy metals were recorded in the tissue of Ceratophyllum demersum from the location Prigrevica, possibly due to the influx of polluted drainage waters from surrounding agricultural areas as well as industrial wastewaters. The obtained results showed that the enforcement of biomonitoring and analyses of other parameters indicative of ecosystem conditions might be useful for improved protection of areas experiencing a strong human impact.
Microorganisms as water quality indicators for the Lim river Delević, Olivera (Faculty of Science, Podgorica (Montenegro)); Đukić, Dragutin (Faculty of Agronomy, Čačak (Serbia)); Radulović, Snežana (Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology) ...
Acta Agriculturae Serbica,
2012
Journal Article
Microbial indicators of the water quality of the Lim River were analysed to assess its potential use for sports, recreational and agricultural activities. Testing was conducted at six locations ...(Plav, Andrijevica, Skakavac, Zaton, Bijelo Polje, Dobrakovo), four times (June, July, August, October) in 2005. Total counts of aerobic mesophilic bacteria, coliforms and faecal coliforms were determined. Aerobic mesophilic counts were highest in the water samples taken from the Bijelo Polje location in July, and lowest in the samples collected from the Plav location in August. The same tendency was observed for coliforms, whose total count, however, was lower in June. Faecal coliform counts were highest in the water samples collected from the Skakakav site in August and lowest in those taken from the Plav location in the same month.
Microorganisms as water quality indicators for the Lim river Delević, Olivera (Faculty of Science, Podgorica (Montenegro)); Đukić, Dragutin (Faculty of Agronomy, Čačak (Serbia)); Radulović, Snežana (Faculty of Sciences, Novi Sad (Serbia). Department of Biology and Ecology) ...
Acta Agriculturae Serbica,
2012
Journal Article
Microbial indicators of the water quality of the Lim River were analysed to assess its potential use for sports, recreational and agricultural activities. Testing was conducted at six locations ...(Plav, Andrijevica, Skakavac, Zaton, Bijelo Polje, Dobrakovo), four times (June, July, August, October) in 2005. Total counts of aerobic mesophilic bacteria, coliforms and faecal coliforms were determined. Aerobic mesophilic counts were highest in the water samples taken from the Bijelo Polje location in July, and lowest in the samples collected from the Plav location in August. The same tendency was observed for coliforms, whose total count, however, was lower in June. Faecal coliform counts were highest in the water samples collected from the Skakakav site in August and lowest in those taken from the Plav location in the same month.
COLOR DOPPLER ULTRASONOGRAPHY DIAGNOSTICS OF MAJOR BLOOD VESSLES OF THE NECK IN PATIENTS AFTER A STROKERaduloviu0107 Sneu017eana1, Josoviu0107 LJiljana 1, Jokiu0107 Aleksandar11Specialized ...Rehabilitation Hospital Banja Koviljau010da, Banja Koviljau010da, SerbiaIntroduction: Stroke is a sudden and an abruptly formed loss of brain functions due to the cutting off of the blood flow to the brain caused by occlusion or hemorrhage of the carotid and vertebrobasilar system of arteries and the border zones. Most common pathological process in the arterial network of the brain is arteriosclerosis. Color Doppler ultrasonography diagnostics is procedure for the examination of blood vessels.Purpose: The aim of this paper is to visualize the changes on the major blood vessels of the neck (carotid and vertebral arteries) in patients after a stroke, and to make a correlation between ultrasonography findings in patients after ischemic and after hemorrhagic stroke.Method: This prospective study performed form January 1st 2013 till January 1st 2016 encompasses 80 patients who went on a rehabilitation after a stroke, patients of both genders, divided into two groups, depending on the stroke type u2013 ischemic or hemorrhagic. The patients had endocranial CT, and all had CDS of carotid and vertebral arteries. For statistical data processing, it was used Hi square and T test.Results: In the ischemic stroke group 87.5% of the patients has arteriosclerotic changes on the carotid and 50% on the vertebral arteries, while in the hemorrhagic group, 36% has pathological findings on carotid and 23% on the vertebral arteries. By comparative analysis, we have discovered that there are statistically significantly more patients with pathological findings on the carotid and vertebral arteries in the ischemic stroke group, and statistically significant larger number of patient with risk hactors such as hypercholesterolemia and diabetes. By analyzing arteriosclerosis risk factors, it is determined that all patients had hypertension as a risk factor. Discussion and Conclusion: By timely execution of non-invasive CDS diagnostic procedures in patients with high arteriosclerosis risk factors (hypertension, hypercholesterolemia, diabetes mellitus and smoking) the changes on the blood vessels can be timely detected, proper treatment can be commenced and thus later complications can be prevented.
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