We studied the presence and frequency of macrophytes and describe the environmental parameters on the entire length of the river Krka. Based on the RDA analysis , species and sections on the river can be grouped in the three groups; in the first group are species, which grow from the source to the central part of the river, in the second are species that grow in a segment about Novo mesto and in the third group are the species that grow in the segment from Novo mesto to the estuary. There is a clear link between the speed of water flow and the type of sediment and the presence of the species.
We estimated the intensity of organic matter degradation through the different groups of organisms in littoral and pelagial+profundal zones in Lake Bohinj. Although the areal mineralization was significantly greater in littoral than pelagial+ profundal, both zones contributed similarly to whole-lake metabolism. The relative importance of the littoral and pelagial+profundal in whole-lake metabolism is a function of lake morphometry and the presence of macrophytes. Publication of this article in Hydrobiologia indicates on quality results that are interesting for other researchers.
Ecosystem health index (EHI) and respiratory electron transport system (ETS) activity were measured in plankton and sediment communities from two lakes differing in their trophic status (Lake Bohinj and L. Bled). The negative correlations that were found between EHI on the one hand and ETS activities of zooplankton and sediment and total ETS activity on the other indicated higher ETS activity of zooplankton, sediment and total ETS activity at higher trophic status. This article contributed new knowledge on the ETS-assay as an estimator of the changes in the lake status.
The quality of the aquatic environment and macrophytes were surveyed in the case of the remarkable karstic river Ljubljanica. A total of 62 taxa of macrophytes were identified in about 100 km of length examined. Of these, amphibious macrophytes dominated as a consequence of intermittent water regime. Completeness of the riparian zone, bank undercutting and sediment accumulation were found to be the most influential.
Respiratory electron transport system (ETS) activity and oxygen consumption in the interstitial water, and in the fine and coarse sediment fractions from the hyporheic zone have been measured in order to estimate the intensity of potential and actual carbon mineralization through microbial communities. The article contributed new knowledge on the processes in hyporheic zone, using ETS-assay and respiration rate measurements in microbial communities. The results of this article showed that ETS activity is an useful indicator of bioactivity in the hyporheic sediments.