Number of found documents: 249
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Korespondence Albrechta Pětipeského z Chýš a Erberku z let 1570-1596
MAREŠ, Petr
2017 - Czech
Available in the Digital Repository of University of South Bohemia.
Korespondence Albrechta Pětipeského z Chýš a Erberku z let 1570-1596

MAREŠ, Petr
Jihočeská univerzita v Českých Budějovicích, 2017

Testing the stress-gradient hypothesis at the roof of the world: effects of the cushion plant Thylacospermum caespitosum on species assemblages
DVORSKÝ, Miroslav
2016 - English
Available in the Digital Repository of University of South Bohemia.
Testing the stress-gradient hypothesis at the roof of the world: effects of the cushion plant Thylacospermum caespitosum on species assemblages

DVORSKÝ, Miroslav
Jihočeská univerzita v Českých Budějovicích, 2016

Effect of low doses of herbicide paraquat on antioxidant defense in Drosophila
KORANDOVÁ, Michala
2016 - English
Disruption of cell equilibrium between production of free radicals and antioxidant defence is named oxidative stress. The main component of antioxidant mechanism is activity of antioxidant enzymes, which include superoxide dismutase (SOD) and catalase. In this study we evaluated the effect of herbicide paraquat on response of SOD and catalase, their transcription level and locomotion activity in Drosophila melanogaster. We exposed the flies to a wide range of paraquat concentration. Our results revealed that transcript and enzymatic levels of both SOD and catalase have a similar biphasic dose response with the peaks at 2,5 ?M paraquat concentration, resembling hormetic effect. Then, males were more sensitive than females. However, females had an increased locomotion activity. We found that paraquat susceptibility is increased in males and mating flies. Therefore, this study supports hypothesis of stress sensitivity elevation as a physiological cost of reproduction. Disruption of cell equilibrium between production of free radicals and antioxidant defence is named oxidative stress. The main component of antioxidant mechanism is activity of antioxidant enzymes, which include superoxide dismutase (SOD) and catalase. In this study we evaluated the effect of herbicide paraquat on response of SOD and catalase, their transcription level and locomotion activity in Drosophila melanogaster. We exposed the flies to a wide range of paraquat concentration. Our results revealed that transcript and enzymatic levels of both SOD and catalase have a similar biphasic dose response with the peaks at 2,5 ?M paraquat concentration, resembling hormetic effect. Then, males were more sensitive than females. However, females had an increased locomotion activity. We found that paraquat susceptibility is increased in males and mating flies. Therefore, this study supports hypothesis of stress sensitivity elevation as a physiological cost of reproduction. Keywords: superoxide dismutase; catalase; antioxidant mechanism; paraquat; Drosophila melanogaster Available in the Digital Repository of University of South Bohemia.
Effect of low doses of herbicide paraquat on antioxidant defense in Drosophila

Disruption of cell equilibrium between production of free radicals and antioxidant defence is named oxidative stress. The main component of antioxidant mechanism is activity of antioxidant enzymes, ...

KORANDOVÁ, Michala
Jihočeská univerzita v Českých Budějovicích, 2016

Measurement of in situ Phasporus Availability in Acidified Soils using Iron-Infused Resin soils.
ČAPEK, Petr
2016 - English
A hybrid anion resin was tested for in situ phosphorus (P) availability measurement in soils of two stands recovering from acidification and having different P-sorption characteristics. The phosphate (P-PO4) sorption capacity of the resin (before saturation) was 48 mol g-1. Sorption and elution were tested under P-PO4 concentrations common in acidic soils (0 0.42 mmol l-1) either with or without the presence of sulfate (0.2 mmol l-1). The efficiency of P-PO4 sorption was independent of the sulfate and was 100 +/- 0.2% (n = 56, +/- SD). The P-PO4 recovery stabilized after six elution steps (each: 50 ml of 0.5 M sodium hydroxide, resin/solution 5:1). The efficiency of P-PO4 recovery was 80 +/- 7% and was used to evaluate field measurements. We determined the amount of P-PO4 in the field using resin bags in three consecutive years. The results indicate that bioavailable P is negatively related to the soil ability to retain P. Available in the Digital Repository of University of South Bohemia.
Measurement of in situ Phasporus Availability in Acidified Soils using Iron-Infused Resin soils.

A hybrid anion resin was tested for in situ phosphorus (P) availability measurement in soils of two stands recovering from acidification and having different P-sorption characteristics. The phosphate ...

ČAPEK, Petr
Jihočeská univerzita v Českých Budějovicích, 2016

Predicting asp and pikeperch recruitment in a riverine redervoir.
BLABOLIL, Petr
2016 - English
Recruitment of two species, asp (Leuciscus aspius) and pikeperch (Sander lucioperca), in a riverine reservoir was studied using a novel statistical approach. Both species are piscivorous and are stocked into reservoirs for biomanipulative purposes to reduce planktivore species. Long-term data series were used, but the number of potential predictors was high. Therefore, a novel informative statistical approach based on dimension reduction methods was applied. Quality of outputs was driven by sampling methods. Main factors affecting asp recruitment were zooplankton abundance, predator density and temperature. In terms of pikeperch fry measured with seine and trawls, the number of predators was the only important factor. Gillnets underestimate small fish and the data were unsuitable for statistical modelling. Keywords: Sliced inversion regression; Stockrecruitment; Temperature; Water level fluctuations; Zooplankton Available in the Digital Repository of University of South Bohemia.
Predicting asp and pikeperch recruitment in a riverine redervoir.

Recruitment of two species, asp (Leuciscus aspius) and pikeperch (Sander lucioperca), in a riverine reservoir was studied using a novel statistical approach. Both species are piscivorous and are ...

BLABOLIL, Petr
Jihočeská univerzita v Českých Budějovicích, 2016

(Arbo)viruses in high European Arctic
ELSTEROVÁ, Jana
2016 - English
Since an ongoing climate change covers strongly the polar areas. Higher temperatures and related climate parameters bring the emergence of new parasites and their pathogens to higher latitudes. This may influence zoonotic diseases including arthropod-transmitted diseases. The tick species Ixodes uriae, parasitizing seabirds in the Arctic, may transmit many pathogens including various arboviruses, Borrelia spirochetes and Babesia apicomplexans. In the study we diagnosed 89 individuals of seabird tick Ixodes uriae and searched for arthropod-borne viruses from the genera Flavivirus, Alphavirus, Orthobunyavirus, Phlebovirus and Orbivirus using genus-specific primers. Moreover we searched for presence of Borrelia spp. and Babesia spp. DNA in the ticks. All samples were negative after PCR amplification for all tested pathogens. The result signalizes that tested pathogens might not be present in such high latitudes of European Arctic. Though, the possibility of introduction of these pathogens may be observable in near future due to quick changing of the Arctic ecosystem with the rising of migration of vertebrate hosts including humans to the polar areas. It is though important to continue to study potential presence of pathogens in polar areas. We are working on increase of the number of tick samples to confirm the presence or absence of the tick-borne pathogens in the European Arctic. Keywords: Arbovirus; Arctic; Polar Areas; Ixodes uriae; Tick-borne pathogen Available in the Digital Repository of University of South Bohemia.
(Arbo)viruses in high European Arctic

Since an ongoing climate change covers strongly the polar areas. Higher temperatures and related climate parameters bring the emergence of new parasites and their pathogens to higher latitudes. This ...

ELSTEROVÁ, Jana
Jihočeská univerzita v Českých Budějovicích, 2016

Demography and Dispersal Ability of a Threatened Saproxylic Beetle: A Mark- Recapture Study of the Rosalia Longicorn (Rosalia alpina)
DRAG, Lukáš
2016 - English
This thesis focuses on demography and mobility of an endangered and strictly protected icon of European saproxylic biodiversity, the Rosalia longicorn beetle (Rosalia alpina). Using the mark-recapture method we estimated the size of the population, adult longevity, and dispersal ability of the Rosalia longicorn on three hills in the Ralska Upland, Czech Republic. Furthermore, we assessed the distribution pattern of another 15 populations inhabiting small patches of old beech forest in this area. Factors affecting local survival and the species conservation are discussed. This thesis focuses on demography and mobility of an endangered and strictly protected icon of European saproxylic biodiversity, the Rosalia longicorn beetle (Rosalia alpina). Using the mark-recapture method we estimated the size of the population, adult longevity, and dispersal ability of the Rosalia longicorn on three hills in the Ralska Upland, Czech Republic. Furthermore, we assessed the distribution pattern of another 15 populations inhabiting small patches of old beech forest in this area. Factors affecting local survival and the species conservation are discussed. Keywords: insect ecology; Natura 2000; Fagus sylvatica; metapopulation Available in the Digital Repository of University of South Bohemia.
Demography and Dispersal Ability of a Threatened Saproxylic Beetle: A Mark- Recapture Study of the Rosalia Longicorn (Rosalia alpina)

This thesis focuses on demography and mobility of an endangered and strictly protected icon of European saproxylic biodiversity, the Rosalia longicorn beetle (Rosalia alpina). Using the mark-recapture ...

DRAG, Lukáš
Jihočeská univerzita v Českých Budějovicích, 2016

Bodrý národní buditel osvícený romantismem? Vybraná beletrie Josefa Franty Šumavského (1796-1857) z 30. let 19. století.
FRANTA, David
2016 - Czech
Available in the Digital Repository of University of South Bohemia.
Bodrý národní buditel osvícený romantismem? Vybraná beletrie Josefa Franty Šumavského (1796-1857) z 30. let 19. století.

FRANTA, David
Jihočeská univerzita v Českých Budějovicích, 2016

Tree-rings mirror management legacy: dramatic response of standard oaks to past coppicing in Central Europe?
ALTMAN, Jan
2016 - English
Available in the Digital Repository of University of South Bohemia.
Tree-rings mirror management legacy: dramatic response of standard oaks to past coppicing in Central Europe?

ALTMAN, Jan
Jihočeská univerzita v Českých Budějovicích, 2016

Effects of the earthworm Eisenia andrei on methanogens in a cattle-impacted soil: A microcosm study
KOUBOVÁ, Anna
2016 - English
The potential of earthworms Eisenia andrei to regulate functional microbiota in cattle-impacted soil was investigated in the laboratory microcosm experiment. Methanogenic archaea and anaerobes were characterised using phylogenetic microarray and phospholipid fatty acid analysis, respectively. The potential of earthworms Eisenia andrei to regulate functional microbiota in cattle-impacted soil was investigated in the laboratory microcosm experiment. Methanogenic archaea and anaerobes were characterised using phylogenetic microarray and phospholipid fatty acid analysis, respectively. Keywords: Cattle winter pasture; methane emission; Methanosarcina sp.; microarray AnaeroChip; PLFA; real-time PCR. Available in the Digital Repository of University of South Bohemia.
Effects of the earthworm Eisenia andrei on methanogens in a cattle-impacted soil: A microcosm study

The potential of earthworms Eisenia andrei to regulate functional microbiota in cattle-impacted soil was investigated in the laboratory microcosm experiment. Methanogenic archaea and anaerobes were ...

KOUBOVÁ, Anna
Jihočeská univerzita v Českých Budějovicích, 2016

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