Introduction 528 Method evaluation 528 Sample collection 530 Isolation methods 530 Preenrichment 530 Enrichment 531 Agar plates 531 Methods for bacterial counts 532 Pathogenic bacteria 533 Campylobacter 533 Clostridium perfringens 536 Listeria 536 Salmonella 537 Spoilage microorganisms 538 Mesotrophic bacteria 538 Psychrotrophic bacteria 539 Yeasts and molds 539 Application of molecular techniq...

Due to the fact that zones of ecological risk have appeared in Lake Ladoga since increase anthropogenic pressure 1970s, monitoring studies are currently needed assess state littoral zone as one takes on main load. The aim work was current waters terms toxicological and hydrochemical characteristics, indicators phytoplankton development, identify most problematic deterioration water quality a ha...

Global mean surface temperatures are increasing. All ecosystems are likely to be affected and there is much interest at present in predicting the effects. In freshwater environments, we expect to observe, among other things, effects similar to those observed under eutrophication, such as increases in zooplankton population density and biomass as a result of enhanced population growth rates. Lag...

background: eutrophication is one of the detrimental environmental problems in water reservoirs dye to the irregular introducing nutrients (phosphorus and nitrogen). this study aimed to explore the eutrophication state of ekbatan reservoir, hamadan, western iran. methods: monthly sampling was conducted during april 2010 to march 2011. seven sampling stations were selected in the various locatio...

Dissolved organic matter (DOM) is one of the important parameters water quality in aquatic ecosystems. In experiments, phyto- and bacterioplankton actively consumed 14C-labeled chlorella hydrolyzate. Removal (by filtration) cyanobacteria from environment leads to an increase rate DOM consumption by bacteria. This indicates possibility a negative effect cyanobacterial metabolites on physiologica...

Allochthonous and autochthonous organic matter deposited in benthic sediments are mineralized by microbial communities, resulting in release of nutrients to the water column. Lakes with different trophic states may have sediments with different carbon and nutrient concentration with consequently different microbial communities. Microbial diversity of surface sediments of three subtropical lakes...

Lake Ilmen is one of the most productive lakes in northwestern part European Russia. The purpose study was to assess trophic status period 2003–2020 based on two different indicators. index (ITS) calculated from hydrochemical indicators: pH value and percentage water saturation with oxygen. other indicator average annual concentration total phosphorus. Interannual ITS values for 2003 2020 were ...

1. In an attempt to discern long-term regional patterns in phytoplankton community composition we analysed data from five deep peri-alpine lake basins that have been included in long-term monitoring programmes since the beginning of the 1970s. Local management measures have led to synchronous declines in phosphorus concentrations by more than 50% in all four lakes. Their trophic state now range...