No (336)
Yes (21)
Number of found documents:
357
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Elimination toxins of cyanobacteria
Jančula, Daniel; Blahová, L.; Maršálek, Blahoslav
2010 - Czech
Phthalocyanine molecules which are able to degrade microcystins - toxins, have been discovered. Byly nalezeny a hodnoceny molekuly ftalocyaninů, pomocí kterých lze degradovat toxiny sinic - microcystiny
Keywords:
toxin; removal; cyanobacteria
Available at various institutes of the ASCR
Elimination toxins of cyanobacteria
Phthalocyanine molecules which are able to degrade microcystins - toxins, have been discovered.
The effect of phosphorus deficiency on growth and primary processes of photosynthesis in algae and cyanobacteria
Zezulka, Štěpán; Maršálek, Blahoslav
2010 - Czech
The management of cyanobacterial blooms is connected with the necessity to limit the input of nutrients into surface water reservoirs, especially phosphorus. Higher content of phosphorus or change in N/P ratio towards phosphorus give advance for cyanobacteria. Laboratory cultures of cyanobacteria Synechococcus and green alga Chlorella were cultivated in standard medium (0.18 mM P) and then transferred into medium without phosphorus or with 0.045 mM, 0.09 mM, 0.18 mM and 0.36 mM P. Growth rate (optical density) and parameters of induced chlorophyll fluorescence were measured repeatedly during 7 days of cultivation. Significant inhibitive effect on growth and fluorescence parameters was found in cyanobacteria cultivated in medium without P. On the other hand, green alga did not exhibit any significant sensitivity to the P concentration in the medium. Omezování rozvoje vodních květů sinic je spojováno s nutností omezit přísun živin do vodních nádrží, a to zejména fosfor. Je známo, že vyšší obsah fosforu nebo změna poměru N/P ve prospěch fosforu zvýhodňují sinice v růstu. Na laboratorních kulturách sinice Synechococcus sp. a zelené řasy Chlorella sp. byl studován vliv deficience fosforu. Kultury předpěstované ve standardním médiu (0.18 mM P) byly převedeny do média zcela bez fosforu nebo obohaceného 0.045 mM, 0.09 mM, 0.18 mM a 0.36 mM fosforu. Rychlost růstu (hustota suspenze) a parametry indukované fluorescence chlorofylu byly měřeny po 1, 2, 3, 4 a 7 dnech expozice. Významný inhibiční účinek na růst i fluorescenční parametry byl zjištěn u sinice, kultivované v médiu bez P. Naopak zelená řasa neprojevila téměř žádnou významnou citlivost na množství P v médiu.
Keywords:
phosphorus; cyanobacteria and algae; photosynthesis
Available at various institutes of the ASCR
The effect of phosphorus deficiency on growth and primary processes of photosynthesis in algae and cyanobacteria
The management of cyanobacterial blooms is connected with the necessity to limit the input of nutrients into surface water reservoirs, especially phosphorus. Higher content of phosphorus or change in ...
Nature - friendly fishpond management
Husák, Štěpán; Květ, Jan
2009 - Czech
Endangered water and march plant species in the fishpond of Czech Republic and their relation to different nature and management fishponds. Ohrožené vodní a bažinné rostliny rybníků v ČR a jejich vztah k podmínkám přírodním a hospodářským.
Available at various institutes of the ASCR
Nature - friendly fishpond management
Endangered water and march plant species in the fishpond of Czech Republic and their relation to different nature and management fishponds.
Ecological and health risks of nutrient contamination
Bláha, Luděk; Babica, Pavel; Bláhová, Lucie; Maršálek, Blahoslav
2009 - Czech
Summary of ecological and health impacts of massive development of cyanobacterial water blooms. Shrnutí informací o ekologických a zdravotních dopadeh masivního rozvoje sinic.
Keywords:
nutrients; cyanobasteria; health risks
Available at various institutes of the ASCR
Ecological and health risks of nutrient contamination
Summary of ecological and health impacts of massive development of cyanobacterial water blooms.
Bioindication of trophic level focused on phytobenthos
Šejnohová, Lenka; Maršálek, Blahoslav
2009 - Czech
Summarisation of information about bioindication of phytobenthos. Sumarizace znalostí ohledně bioindikace fytonbentosu.
Keywords:
trophy; trophisation; phytobenthos
Available at various institutes of the ASCR
Bioindication of trophic level focused on phytobenthos
Summarisation of information about bioindication of phytobenthos.
Practical experience with the management of cyanobacterial water blooms
Maršálek, Blahoslav; Jančula, Daniel; Maršálková, Eliška; Vinklárková, Darina
2009 - Czech
Article introduce the Centre for cyanobacteria and their toxins as an organisation with practical experince with the management of cyanobacterial water blooms in Czech republic as well as in foreing countries. Článek představuje Centrum pro cyanobakterie a jejich toxiny. Zaměřuje se na prezentaci výsledků a zkušeností s obnovou nádrží zasažených vodními květy sinic jak v České republice, tak v zahraničí.
Keywords:
management of cyanobacterial water blooms; projects of revitalization; cyanobacterial toxins
Available at various institutes of the ASCR
Practical experience with the management of cyanobacterial water blooms
Article introduce the Centre for cyanobacteria and their toxins as an organisation with practical experince with the management of cyanobacterial water blooms in Czech republic as well as in foreing ...
Nanotechnology and alternative technology for phosphorus reduction
Maršálková, Eliška; Maršálek, Blahoslav
2009 - Czech
Summarisation of information about methods reducing phosphorus in waste water. Sumarizace znalostí o metodách odstranění fosforu z odpadních vod.
Keywords:
phosphorus; nanotechnology; waste waters
Available at various institutes of the ASCR
Nanotechnology and alternative technology for phosphorus reduction
Summarisation of information about methods reducing phosphorus in waste water.
First results limnological research of lakes on James Ross Island (NW Weddell Sea, Antarctica)
Nedbalová, Linda; Elster, Josef
2009 - Czech
In antarctic summers of 2008 and 2009, we performed the first limnological survey of 34 deglacilal lakes on James Ross Island (NW Weddell Sea, Antarctica) V antarktických létech 2008 a 2009, jsme provedli základní limnologický průzkum 34 jezer v odledněné části ostrova James Ross (SZ Weddellovo moře, Antarktida)
Keywords:
research; lakes; Antarctica
Available at various institutes of the ASCR
First results limnological research of lakes on James Ross Island (NW Weddell Sea, Antarctica)
In antarctic summers of 2008 and 2009, we performed the first limnological survey of 34 deglacilal lakes on James Ross Island (NW Weddell Sea, Antarctica)
Microclimate and water table fluctuation in the central part of the Weitfäller peatbogs
Kučerová, Andrea; Kučera, Tomáš; Hájek, Tomáš
2009 - Czech
Water table (WT) is high in the undisturbed parts of the Weitfäller bogs, however short-term decline of the WT was repeatedly measured in summer. Daily air temperature amplitude is quite high reaching 28.7 °C. Hladina podzemní vody v nenarušených, vegetačně velmi cenných partiích Rokyteckých slatí je celoročně vysoká, přesto dochází v letním období ke krátkodobým, výrazným poklesům v závislosti na povětrnostních podmínkách. Tyto poklesy jsou součástí přirozené dynamiky vodního režimu tohoto vegetačního komplexu. Během celého vegetačního období byly měřeny značné denní amplitudy teploty (max. 28.7 °C).
Keywords:
peatbog; air temperature extrems; water table fluctuation
Available at various institutes of the ASCR
Microclimate and water table fluctuation in the central part of the Weitfäller peatbogs
Water table (WT) is high in the undisturbed parts of the Weitfäller bogs, however short-term decline of the WT was repeatedly measured in summer. Daily air temperature amplitude is quite high reaching ...
Biodiversity and Forests in National Parks
Hédl, Radim; Svátek, M.
2009 - Czech
This paper analyses definitions of national park according to international (IUCN) and national (Czech) legislative. It concludes that there is considerable variability and that no universaly valid views are possible. Concerning the Czech National parks, the current tendency towards large unmanaged areas called wilderness is discussed. The conclusion is that despite of it usefulness, wilderness should be only one of the management strategies in order to maintain biodiversity, which is the principal purpose of existience a national park. Tento článek analyzuje definice národního parku podle mezinárodní (IUCN) a národní (české) legislativy. Konstatuje, že existuje značná různorodost a přijmout jednotný koncept není možné. Vzhledem k českým národním parkům, kde současná tendence je směrem k velkým bezzásahovým územím nazývaným divočina, článek uzavírá, že toto by mělo být jen jedno hledisko. Důvodem je ochrana biodiverzity, která je primárním účelem existence národního parku.
Keywords:
biodiversity; legislative; wilderness
Available at various institutes of the ASCR
Biodiversity and Forests in National Parks
This paper analyses definitions of national park according to international (IUCN) and national (Czech) legislative. It concludes that there is considerable variability and that no universaly valid ...
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