Screening of the health risks of biofilms using a battery of in vitro toxicity assays
Bláha, Luděk; Babica, P.; Sabatier, S.; Admiraal, W.; Maršálek, Blahoslav
2002 - anglický Traces of microcystin-lika compounds were detected by HPCL in biofilm samples from Netherlands. Half of the tested samples had no significant effect in any of the in vitro assays, other biofilms elicicted weak inhibitory/toxic effects mostly in high concentrations, which are not environmentally relevant. Most of observed weak effect seem to be associated with oxidative stress, an important toxicologicalĺmechanisms, as detected by depletion of intracellular antioxidantĺGHS by several biofilm samples. Potential adverse effects ofĺexterne polutants, which are known to accumulate in theĺperyphyton biomass should not underestimated. Mutagenicity andĺneurotoxicity of biofilm metabolits seems to be negligible. Weekĺadverse effects of biofilm extracts detected in a batery of inĺvitro assays indicate relatively low human health risksĺassociated with biofilm toxicity. Klíčová slova: HCPL; microcystin Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Screening of the health risks of biofilms using a battery of in vitro toxicity assays

Traces of microcystin-lika compounds were detected by HPCL in biofilm samples from Netherlands. Half of the tested samples had no significant effect in any of the in vitro assays, other biofilms ...

Bláha, Luděk; Babica, P.; Sabatier, S.; Admiraal, W.; Maršálek, Blahoslav
Botanický ústav, 2002

Impact of intesive fishery management on the ecological sustainability and functioning of fishpond ecosystem in the Czech Republic
Pechar, Libor
2002 - anglický The aim of the present parer are: to describe the increasing oscillatory patterns as a result of the high level of eutrophication and to show decrease of efficiency in utilization of primary production at the high level of eutrophication. Klíčová slova: fishery management; ecological sustainability; fishpond ecosystem; management; hladina Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Impact of intesive fishery management on the ecological sustainability and functioning of fishpond ecosystem in the Czech Republic

The aim of the present parer are: to describe the increasing oscillatory patterns as a result of the high level of eutrophication and to show decrease of efficiency in utilization of primary ...

Pechar, Libor
Botanický ústav, 2002

Algae and extreme environments - ecology and physiology
Elster, Josef
2002 - anglický All photoautotrophic prokaryotes have evolved from the group Eubacteria. From fossil remains in the form of stromatolites, it has been possible to date the first prokaryotic oxyphototrophic algae (Cyanobacteria) back to almost 3,450 million years. Evolution of Eukaryotic Algae did not occur until about 700-800 million years ago. The endosymbiotic hypothesis is the most accepted theory for the origin of eukaryotic organells. Oxyphototrophic microorganisms (cyanobacteria and algae) are ubiquitous and, because of their evolutionary antiquity, are widely adapted to all the extremes related with the many changes in geological time. During the last ten years special attention has been given to study of cyanobacteria and algae in environment with extreme environment. The methodology has been steadily developing for biological-taxonomical and ecological-physiological studies. Klíčová slova: algae, cyanobacteria, extreme environment Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Algae and extreme environments - ecology and physiology

All photoautotrophic prokaryotes have evolved from the group Eubacteria. From fossil remains in the form of stromatolites, it has been possible to date the first prokaryotic oxyphototrophic algae ...

Elster, Josef
Botanický ústav, 2002

Mobility of manganese in aquatic ecosystems
Miholová, D.; Pokorný, Jan; Száková, J.; Vysloužilová, M.; Kolihová, D.
2000 - anglický Concentration of Mn in sediment, water and plant biomass was studied in eutrophic fishponds of Třeboň Biosphere Reserve. Klíčová slova: heavy metals; marophytes; těžké kovy; kovy Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Mobility of manganese in aquatic ecosystems

Concentration of Mn in sediment, water and plant biomass was studied in eutrophic fishponds of Třeboň Biosphere Reserve.

Miholová, D.; Pokorný, Jan; Száková, J.; Vysloužilová, M.; Kolihová, D.
Botanický ústav, 2000

Mobility of manganese in aquatic ecosystems
Miholová, D.; Száková, J.; Vysloužilová, M.; Kolihová, D.; Pokorný, Jan
2000 - anglický Concentration of Mn in sediment, water and plant biomass was studied in eutrophic fishponds of Třeboň Biosphere Reserve. Klíčová slova: heavy metals; marophytes; těžké kovy; kovy Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Mobility of manganese in aquatic ecosystems

Concentration of Mn in sediment, water and plant biomass was studied in eutrophic fishponds of Třeboň Biosphere Reserve.

Miholová, D.; Száková, J.; Vysloužilová, M.; Kolihová, D.; Pokorný, Jan
Botanický ústav, 2000

Stabilization of the natural landscape in Bohemian Forest frontier area (Czech Republic/Germany) abandoned for 40 years
Kučera, Tomáš; Guth, J.
1999 - anglický Land cover and its development is an object of study in applied landscape ecology and landscape conservation. Historical aerial photos are the basic data source for studies of long-term landscape development. All of the data can be analysed by the use of geographical information systems, GIS. GIS IDRISI is recommended for academic and nature conservation purposes, because of its powerful tools for spatial pattern (landscape structure) evaluation, user-friendliness and low price.Own case study is located in the borderland along the former "Iron Curtain". After the landscape was abandoned, the processes of "desynanthropisation" started. In the Bohemian Forest Mts. in SW Bohemia, (i) patch size and shape were evaluated and (ii) spatial pattern was characterised by various indices: diversity, fragmentation, contagion, etc. Land cover development is presented in a special triangular "landcovergram". The changes of indices are closely, but not simply, related to the intensity of human influence (management). Two types of local differences are important: the original situation ("the starting point") and both the quality and quantity of postsynanthropic management. Two main developments of landscape structure have occured in the upper floodplains near the Bohemian/Bavarian borderline: (i) the managed parcels were homogenised, and at the same time, (ii) wetlands were abondoned within their natural borders. Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Stabilization of the natural landscape in Bohemian Forest frontier area (Czech Republic/Germany) abandoned for 40 years

Land cover and its development is an object of study in applied landscape ecology and landscape conservation. Historical aerial photos are the basic data source for studies of long-term landscape ...

Kučera, Tomáš; Guth, J.
Botanický ústav, 1999

All cyano-bacteria may be suspicious of being toxin producers
Maršálek, Blahoslav
1997 - anglický Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. All cyano-bacteria may be suspicious of being toxin producers

Maršálek, Blahoslav
Botanický ústav, 1997

Energy, water and matter flow in the landscape - the key to sustainable land use
Ripl, W.; Ridgill, S. C.; Eiseltová, Martina; Pokorný, Jan
1997 - anglický Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Energy, water and matter flow in the landscape - the key to sustainable land use

Ripl, W.; Ridgill, S. C.; Eiseltová, Martina; Pokorný, Jan
Botanický ústav, 1997

Heavy metals in the ecosystems of the Lužnice river and the Naděje fishpond system
Pokorný, Jan; Pechar, Libor; Radová, Jana; Bastl, J.; Drbal, K.
1996 - anglický Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. Heavy metals in the ecosystems of the Lužnice river and the Naděje fishpond system

Pokorný, Jan; Pechar, Libor; Radová, Jana; Bastl, J.; Drbal, K.
Botanický ústav, 1996

What can the fishponds sustain?
Pokorný, Jan; Pechar, Libor
1996 - anglický Plné texty jsou dostupné na jednotlivých ústavech Akademie věd ČR. What can the fishponds sustain?

Pokorný, Jan; Pechar, Libor
Botanický ústav, 1996