Abstract-The main objective of this study was to assess the ecological status of the Mlava River based on epilithic diatoms and to test the use of diatom indices as a tool for estimating the quality of fl owing waters in Serbia. Quantitative analysis showed that in April Achnanthidium minutissimum was dominant at each site, except at the fi fth site, where Amphora pediculus was dominant. In July and September, Achnanthidium minutissimum, Achnanthidium pyrenaicum, Amphora pediculus, Denticula tenuis, Diatoma vulgaris, Gomphonema elegantissimum, Cocconeis pseudolineata and Cocconeis placentula var. lineata dominated. Detrended correspondence analysis (DCA) was used to detect the major patterns of variation in species composition. The fi rst DCA axis summarizes the distribution of the diatom community, mainly through temperature, conductivity, oxygen and water hardness gradient. The second DCA axis was weakly correlated with few variables. Based on the average values of the pollution sensitivity index (IPS), commission for economical community metric (CEE) and biological diatom index (IBD), the water of the Mlava River belonged to water class I during all three seasons. Values of the diatom-based eutrophication/pollution index (EPI-D) indicated class II water quality. According to calculated trophic diatom index (TDI) values, water of the Mlava River was characterized by intermediate nutrient concentrations during three seasons. Principal components analysis was used to represent the correlation between diatom indices, and the highest correlation among the selected diatom indices is seen between EPI-D, IPS and IBD.
The main objective of this paper is to report the diatom taxa identified from
the Nisava River and its tributaries, the Jerma and Temska rivers. The study
area included 11 sampling sites along the Nisava River, with one site on the
Jerma River and one on the Temska River. Monthly samples (from stones,
sediments and macrophytes) were collected from May 2008 to May 2009. Diatom
frustules were cleaned with chemical agents, and mounted on permanent slides.
In total, 194 diatom taxa were identified. The most species rich genera are
Navicula (25), Nitzschia (17) and Gomphonema (13), while other genera are
presented with one or more species. Detailed floristic analysis of the
benthic diatom flora has not been conducted before on these rivers.
Therefore, this paper provides a baseline for future research.
[Acknowledgments. The work was supported by projects Nos. TR037009, III43002
and III45012 that are financed by the Ministry of Education and Science of
the Republic of Serbia.]
The main objective of this paper is to report the desmid taxa identified from four Serbian peat bogs: Pešter, Daić Lake on Mt. Golija, Crvene pode on Mt. Tara and Horgoš. Samples were collected in the period from 2007 to 2011. In total, 220 desmid taxa from 22 genera were identified. The most species-rich genera are Cosmarium (81), Staurastrum (38) and Closterium (31). Of the total number, 66 desmid taxa are new for the Serbian desmid flora. [Projekat Ministarstva nauke Republike Srbije, br. TR 037009
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