Biology Centre of the Academy of Sciences of the Czech Republic, Institute of Hydrobiology

Staff List

Vrba, Jaroslav

vrba@hbu.cas.cz

+420 387 775 872
http://www.hbu.cas.cz/show.php?show=84&lang=en

Papers:

Štrojsová, A., Nedoma, J., Štrojsová, M., Cao, X., Vrba, J.
(2008) The role of cell-surface-bound phosphatases in species competition within natural phytoplankton assemblage: an in situ experiment. Journal of Limnology, 67 (2): 128–138.
Research impacted

Štrojsová, M., Nedoma, J., Seďa, J., Vrba, J.
(2008) Diet quality impact on growth, reproduction and digestive activity in Brachionus calyciflorus. Journal of Plankton Research, 30 (10): 1123–1131.
Research impacted

Vrba, J., Fott, J., Kohout, L., Kopáček, J., Macek, M., Nedbalová, L.
(2008) Limnological survey of the lakes Wielki Staw and Maly Staw in the Giant Mts. (Karkonosze). Opera Corcontica, 45: 45–58.
Research non impacted

Vrba, J.
(2008) Dlouhodobý ekologický výzkum [Long-term ecological research]. Ochrana přírody 2008, (5): 31–33.
Others

Vrba, J.,
(2008) Přímá mikroskopická detekce enzymů u planktonních organismů [Direct microscopic detection of enzymes in planktonic organisms]. Akademický bulletin AV ČR, 2008 (10): 24–25.
Others

Posch, T.*, Mindl, B.*, Horňák, K., Jezbera, J., Salcher, M.M.*, Sattler, B.*, Sonntag, B.*, Vrba, J., Šimek, K.
(2007) Biomass reallocations within freshwater bacterioplankton induced by manipulating phosphorus availability and grazing. Aquatic Microbial Ecology, 49 (3): 223–232.
Research impacted

Salcher, M.M.*, Hofer, J.*, Horňák, K., Jezbera, J., Sonntag, B.*, Vrba, J., Šimek, K., Posch, T.*
(2007) Modulation of microbial predator-prey dynamics by phosphorus availability: Growth patterns and survival strategies of bacterial phylogenetic clades. FEMS Microbiology Ecology, 60 (1): 40–50.
Research impacted

Štrojsová, M., Vrba, J.
(2007) Rotifer digestive enzymes: direct detection using the ELF technique. Hydrobiologia, 593 (1): 159–165.
Research impacted

Groben, R.*, Hahn, M.W.*, Horňák, K., Mergeay, J.*, Šimek, K., Vrba, J.
(2007) Meeting report: ALTER-Net workshop about the “Application of molecular techniques to study biodiversity, structure and function of planktonic communities in lakes” at Blanes, Spain, February 15–16, 2007. Protist, 158 (4): 417–421.
Others

Straškrábová, V., Brandl, Z., Komárková, J., Macek, M., Seďa, J., Šimek, K., Vrba J.
(2006) Climate effeted spring events in pelagic succession of two reservoirs. In: Book of Abstracts, 5th International Conference on Reservoir Limnology and Water Quality, Brno, August 27–31, 2006. Biology Centre of the Academy of Sciences of the Czech Republic, Institute of Hydrobiology, České Budějovice; Centre for Cyanobacteria and Their Toxins, Masaryk University Brno. ISBN 80–86188–23–X: pp. 55–56.
Others

Kopáček, J., Vrba, J.
(2006) Integrated ecological research of catchment-lake ecosystems in the Bohemian Forest (Central Europe): A preface. Biologia, 61 (Suppl. 20): S363–S370.
Research impacted

Nedoma, J., Vrba, J.
(2006) Specific activity of cell-surface acid phosphatase in different bacterioplankton morphotypes in an acidified mountain lake. Environmental Microbiology, 8 (7): 1271–1279.
Research impacted

Šimek, K., Horňák, K., Jezbera, J., Nedoma, J., Vrba, J., Straškrábová, V., Macek, M., Dolan, J.R.*, Hahn, M.W.*
(2006) Maximum growth rates and possible life strategies of different bacterioplankton groups in relation to phosphorus availability in a freshwater reservoir. Environmental Microbiology, 8 (9): 1613–1624.
Research impacted

Štrojsová, A., Vrba, J.
(2006) Phytoplankton extracellular phosphatases: investigation using the ELF (Enzyme Labelled Fluorescence) technique. Polish Journal of Ecology, 54 (4): 715–723.
Research impacted

Plachno, B.J.*, Adamec, L.*, Lichtscheidl, I.K.*, Peroutka, M.*, Adlassnig, W.*, Vrba, J.
(2006) Fluorescence labelling of phosphatase activity in digestive glands of carnivorous plants. Plant Biology, 8 (6): 813–820.
Research impacted

Nedbalová, L.*, Vrba, J., Fott, J.*, Kohout, L.*, Kopáček, J., Macek, M., Soldán, T.*
(2006) Biological recovery of the Bohemian Forest lakes from acidification. Biologia, 61 (Suppl. 20): S453–S465.
Research impacted

Sirová, D.*, Vrba, J., Rejmánková, E.*
(2006) Extracellular enzyme activities in benthic cyanobacterial mats: comparison between nutrient-enriched and control sites in marshes of northern Belize. Aquatic Microbial Ecology, 44 (1): 11–20.
Research impacted

Vrba, J., Kopáček, J., Bittl, T., Nedoma, J., Štrojsová, A., Nedbalová, L., Kohout, L.*, Fott, J.*
(2006) A key role of aluminium in phosphorus availability, food web structure, and plankton dynamics in strongly acidified lakes. Biologia, 61 (Suppl. 20): S441–S451.
Research impacted

Cao, X.*, Štrojsová, A., Znachor, P., Zapomělová, E., Liu, G.*, Vrba, J., Zhou, Y.*
(2005) Detection of extracellular phosphatases in natural spring phytoplankton of a shallow eutrophic lake (Donghu, China). European Journal of Phycology, 40 (3): 251–258.
Research impacted

Mindl, B.*, Sonntag, B.*, Pernthaler, J.*, Vrba, J., Psenner, R.*, Posch, T.*
(2005) Effects of phosphorus loading on interactions of algae and bacteria: reinvestigation of the ‘phytoplankton–bacteria paradox’ in a continuous cultivation system. Aquatic Microbial Ecology, 38 (3): 203–213.
Research impacted

Straškrábová, V., Šimek, K., Vrba, J.
(2005) Long-term development of reservoir ecosystems – changes in pelagic food webs and their microbial component. Limnetica, 24 (1–2): 9–20.
Research non impacted

Štrojsová, A., Vrba, J., Nedoma, J., Šimek, K.
(2005) Extracellular phosphatase activity of freshwater phytoplankton exposed to different in situ phosphorus concentrations. Marine and Freshwater Reseach, 56 (4): 417–424.
Research impacted

Štrojsová, M.*, Vrba, J.
(2005) Direct detection of digestive enzymes in planktonic rotifers using enzyme-labelled fluorescence (ELF). Marine and Freshwater Research, 56 (2): 189–195.
Research impacted

Znachor, P., Vrba, J., Nedoma, J., Kopáček, J.
(2005) Bacterial and phytoplankton responses to nutrient and pH changes during short term in situ experiments in two acidified lakes. Algological Studies, 115: 79–99.
Research non impacted

Vrba, J., Svoboda, J.*, Fuksa, J. K.*
(2005) Fluorescenční stanovení aminopeptidázové aktivity jako alternativní indikátor kvality povrchových vod? [The fluorescence assay of aminopeptidase activity as an alterantive indicator of water quality?]. In: Ambrožová, J., Tlustá, P. (eds.), Sborník konference Vodárenská biologie 2005. Praha, February 2–3, 2005, Vodní zdroje EKOMONITOR, Chrudim, ISBN 80–86832–07–4: pp. 37–42.
Others

Kopáček, J., Brzáková, M., Hejzlar, J., Nedoma, J., Porcal, P., Vrba, J.
(2004) Nutrient cycling in a strongly acidified mesotrophic lake. Limnology and Oceanography, 49 (4): 1202–1213.
Research impacted

Šantrůčková, H.*, Vrba, J., Picek, T.*, Kopáček, J.
(2004) Soil biochemical activity and phosphorus transformations and losses from acidified forest soils. Soil Biology Biochemistry, 36: 1569–1576.
Research impacted

Šimek, K., Jezbera, J., Horňák, K., Vrba, J., Seďa, J.
(2004) Role of diatom-attached choanoflagellates of the genus Salpingoeca as pelagic bacterivores. Aquatic Microbial Ecology, 36: 257–269.
Research impacted

Vrba, J., Callieri, C.*, Bittl, T.*, Šimek, K., Bertoni, R.*, Filandr, P.*, Hartman, P., Hejzlar, J., Macek, M., Nedoma, J.
(2004) Are bacteria the major producers of extracellular glycolytic enzymes in aquatic environments? International Review of Hydrobiology, 89 (1): 102-117.
Research impacted

Vrba, J., Fott, J.*, Kohout, L.*, Kopáček, J.
(2004) Současné zotavování acidifikovaných jezer na Šumavě [Recent recovery of acidified lakes in the Bohemian Forest]. In: Dvořák, L., Šustr, P. (eds.), Sborník konference Aktuality šumavského výzkumu II. Srní, October 4-7, 2004, Správa NP a CHKO Šumava: pp. 99-103.
Others

Kopáček, J., Brzáková, M., Hejzlar, J., Kaňa, J., Porcal, P., Vrba, J.
(2003) Mass balance of nutrients and major solutes in the Plešné watershed-lake ecosystem in the 2001 hydrological year. Silva Gabreta, 9: 33-52.
Research non impacted

Nedoma, J., Straškrábová, V., Znachor, P., Vrba, J.
(2003) Primary and bacterial production in three acidified lakes in the Bohemian Forest. Silva Gabreta, 9: 53-70.
Research non impacted

Nedoma, J., Štrojsová, A., Vrba, J., Komárková, J., Šimek K.
(2003) Extracellular phosphatase activity of natural plankton studied with ELF97 phosphate: fluorescence quantification and labelling kinetics. Environmental Microbiology, 5 (6): 462-472.
Research impacted

Sirová, D.*, Adamec, L.*, Vrba, J.
(2003) Enzymatic activities in traps of four aquatic species of the carnivorous genus Utricularia. New Phytologist, 159 (3): 669-675.
Research impacted

Štrojsová, A.,Vrba, J., Nedoma, J., Komárková, J., Znachor, P.
(2003) Seasonal study of extracellular phosphatase expression in the phytoplankton of a eutrophic reservoir. European Journal of Phycology, 38: 295-306.
Research impacted

Vrba, J., Kopáček, J., Fott, J.*, Kohout, L.*, Nedbalová, L.*, Pražáková, M.*, Soldán, T.*, Schaumburg, J.*
(2003) Long-term studies (1871-2000) on acidification and recovery of lakes in the Bohemian Forest (central Europe). The Science of the Total Environment, 310 (1-3): 73-85.
Research impacted

Vrba, J., Nedoma, J., Kohout, L.*, Kopáček, J., Nedbalová, L.*, Ráčková, P.*, Šimek, K.
(2003) Massive occurrence of heterotrophic flaments in acidified lakes: seasonal dynamics and composition. FEMS Microbiology Ecology, 46 (3): 281-294.
Research impacted

Kopáček, J., Fott, J.*, Hejzlar, J., Majer, V.*, Stuchlík, E.*, Veselý, J.*, a Vrba, J.
(2003) Obnovit či neobnovit přečerpávání vody do Černého jezera? [To renew or not to renew reverse water pumping into Černé Lake?] Vodní hospodářství, 53 (3): 65-67.
Others

Nedoma, J., Vrba, J., Štrojsová, A., Šimek, K., Znachor, P.
(2003) Možnosti využití analýzy obrazu při vyhodnocování mikrobiální biomasy a aktivity ve vzorcích přirozených vod [Use of image analysis for estimation of microbial biomass and activity in samples of natural aquatic ecosystems]. Acta Facultatis Ecologiae: 10 (Suppl. 1): 59-61.
Others

Straškrábová, V., Nedoma, J., Šimek, K., Vrba, J.
(2003) Pelagic microbial assemblages in oligotrophic mountain lakes. Acta Facultatis Ecologiae: 10 (Suppl. 1): 15-18.
Others

Štrojsová, A., Vrba, J., Nedoma, J.
(2003) Extracelulární fosfatázy fytoplanktonu nádrže Římov [Extracellular phosphatases of the Římov reservoir phytoplankton]. Acta Facultatis Ecologiae: 10 (Supplement 1): 65-68.
Others

Vrba, J., Fott, J.*, Kopáček, J., Soldán, T.*, Veselý, J.*
(2003) Sto třicet let výzkumu šumavských jezer [130 years of lake research in the Bohemian Forest]. Živa, 51 (1): 25-29.
Others

Vrba, J., Kopáček, J., Nedbalová, L.*
(2003) Zotavování šumavských jezer z acidifikace - příklad Plešného jezera [A recovery from acidification - Plešné Lake in the Bohemian Forest]. Acta Facultatis Ecologiae: 10 (Suppl. 1): 259-261.
Others

Kopáček, J., Stuchlík, E.*, Veselý, J.*, Schaumburg, J.*, Anderson, I.C.*, Fott, J.*, Hejzlar, J., Vrba, J.
(2002) Hysteresis in reversal of Central European mountain lakes from atmospheric acidification. Water, Air, and Soil Pollution: Focus, 2 (2): 91–114.
Research impacted

Svoboda, J.*, Vrba, J., Simanov, L.*, Fuksa, J.K.*
(2002) Vývoj mikrobiální aktivity v podélném profilu Vltavy – po proudu k povodí a dále (Development of microbial activity in the Vltava River – a longitudinal profile to Podolí and downstream). In: Ambrožová, J. (ed.): 18. seminář Aktuální otázky vodárenské biologie, Praha, February 6–7, 2002, VŠCHT, Praha, pp. 171–175. ISBN 80–7080–467–X.
Others

Vrba, J., Kopáček, J., Fott, J.*
(2002) Šumavská ledovcová jezera na přelomu tisíciletí (Bohemian Forest lakes on the turn of centuries). Živa, 6: 265–269.
Others

Nedoma, J., Vrba, J., Hejzlar, J., Šimek, K., García, J.C.*, Armengol, J.*
(2002) Spatial patterns of phosphorus dynamics along to canyon-shaped reservoirs of different trophy In: Hydrobiological Institute AS CR (eds.): ResLim 2002, Extended Abstracts, 4th International Conference on Reservoir Limnology and Water Quality, České Budějovice, August 12–16, 2002, Institute of Hydrobiology Academy of Sciences of the Czech Republic, Faculty of Biological Sciences University of South Bohemia, pp. 250-253.
Others

Straškrabová, V., Šimek, K., Vrba, J., Nedoma, J., Macek, M., Hartman, P.
(2002) Seasonal and interannual changes of microbial loop in pelagic food webs of reservoirs In: Hydrobiological Institute AS CR (eds.): ResLim 2002, Extended Abstracts, 4th International Conference on Reservoir Limnology and Water Quality, České Budějovice, August 12–16, 2002, Institute of Hydrobiology Academy of Sciences of the Czech Republic, Faculty of Biological Sciences University of South Bohemia, pp. 322-325.
Others

Štrojsová, A., Komárková, J., Nedoma, J., Vrba, J.
(2002) Seasonal study of expression of extracellular phosphatases in natural phytoplankton in an eutrophic reservoir In: Hydrobiological Institute AS CR (eds.): ResLim 2002, Extended Abstracts, 4th International Conference on Reservoir Limnology and Water Quality, České Budějovice, August 12–16, 2002, Institute of Hydrobiology Academy of Sciences of the Czech Republic, Faculty of Biological Sciences University of South Bohemia, pp. 326-329.
Others

Vrba, J., Nedoma, J., Šimek, K., Straškrabová, V., Štrojsová, A., Fuksa, J.K.*, Svoboda, J.*
(2002) Extracellular enzymes and production parameters in two canyon reservoirs of different trophy: spatial patterns In: Hydrobiological Institute AS CR (eds.): ResLim 2002, Extended Abstracts, 4th International Conference on Reservoir Limnology and Water Quality, České Budějovice, August 12–16, 2002, Institute of Hydrobiology Academy of Sciences of the Czech Republic, Faculty of Biological Sciences University of South Bohemia, pp. 362-365.
Others

Bittl, T.*, Vrba, J., Nedoma, J., Kopáček, J.
(2001) Impact of ionic aluminium on extracellular phosphatases in acidified lakes. Environmental Microbiology, 3 (9): 578-587.
Research impacted

Kopáček, J., Hejzlar, J., Kaňa, J., Porcal, P., Pšenáková, P.*, Vrba, J.
(2001) Element budgets in three Bohemian Forest lakes and their watersheds in the 2000 hydrological year: II. Černé Lake. Silva Gabreta 6:53-72.
Research impacted

Nedoma, J., Vrba, J., Hanzl, T.*, Nedbalová, L.*
(2001) Quantification of pelagic filamentous microorganisms in aquatic environments using the line-intercept method. FEMS Microbiology Ecology 38: 81-85.
Research impacted

Pernthaler, J.*, Posch, T.*, Šimek, K., Vrba, J., Pernthaler, A.*, Glöckner, F.O.*, Nübel, U.*, Psenner, R.*, Amann, R.*
(2001) Predator-specific enrichment of actinobacteria from a cosmopolitan freshwater clade in mixed continuous culture. Applied and Environmental Microbiology, 5: 2145-2155.
Research impacted

Posch, T.*, Jezbera, J., Vrba, J., Šimek, K., Pernthaler, J.*, Andreatta, S.*, Sonntag B.*
(2001) Size selective feeding in Cyclidium glaucoma (Ciliophora, Scuticociliatida) and its effects on bacterial community structure: a study from a continuous cultivation system. Microbial Ecology, 42: 217-227.
Research impacted

Brzáková, M., Hejzlar, J., Borovec, J., Nedoma, J., Seďa, J., Šimek, K., Vrba, J.
(2001) Retence fosforu ve vodárenské nádrži Římov (Phosphorus retention in drinking water reservoir Římov). In: Kalousková, N., Dolejš, P. (eds.) Sborník z konference Pitná voda 2001, 6. pokračování konferencí Pitná voda z údolních nádrží, Tábor, May 21-24, 2001, W&ET Team, Č. Budějovice, pp. 295-300.
Others

Straškrabová, V., Fott, J.*, Hartman, P., Macek, M., Nedoma, J., Šimek, K., Vrba, J.
(2000) Structure of pelagic food webs in low-alkalinity lakes – forested and alpine catchments. Silva Gabreta, 4:199-212.
Research non impacted

Vrba, J.
(2000) Comment to Sherr and Sherr (1999):”Is there any appropriate way to distinguish different β-N-acetylhexosaminidase activities in aquatic environments?” FEMS Microbiology Ecology, 33: 81-84.
Research impacted

Vrba, J.
(2000) Bibliography of publications and manuscripts relating to the Bohemian/Bavarian Forest lakes. Silva Gabreta, 4: 259-278.
Research non impacted

Vrba, J., Kopáček, J., Fott, J.*
(2000) Long-term limnological research of the Bohemian Forest lakes and their recent status. Silva Gabreta, 4: 7-28.
Research non impacted

Nedoma, J., Vrba, J.
(2000) Vláknité mikroorganismy v šumavských jezerech (Filamentous microorganisms of Bohemian Forest lakes). In: Rulík, M. (ed.), XII. Limnologická konference Limnologie na přelomu tisíciletí, Kouty nad Desnou, September 18-22, 2000, Univerzita Palackého Olomouc, pp. 30-33.
Others

Vrba, J., Bittl, T.*, Nedoma, J., Kopáček, J., Nedbalová, L.*, Fott, J.*
(2000) Jedinečný plankton acidifikovaných šumavských jezer jako důsledek působení hliníku a limitace fosforem (Unique plankton of acidified Bohemian Forest lakes as a consequence of aluminium effect and phosphorus limitation). In: Rulík, M. (ed.), XII. Limnologická konference Limnologie na přelomu tisíciletí, Kouty nad Desnou, September 18-22, 2000, Univerzita Palackého Olomouc, pp. 47-51.
Others

Vrba, J., Kopáček, J., Fott, J.*, Šantrůčková, H.*, Veselý, J.*, Vicena, I.*
(2000) Dlouhodobý výzkum šumavských jezer - výstupy pro lesnickou praxi (Long-term research of the Bohemian Forest lakes - outlines for a forest management). In: Podrázský, V., Ryšánková, H., Vacek, S., Ulbrichová, I. (eds.): Sborník z celostátní konference Monitoring, výzkum a management ekosystémů Národního parku Šumava, Kostelec nad Černými lesy, November 27-28, 2000, Správa národního parku a chráněné krajinné oblasti Šumava, pp. 44-50.
Others

Posch, T.*, Šimek, K., Vrba, J., Pernthaler, J.*, Nedoma, J., Sattler, B.*, Sonntag, B.*, Psenner, R.*
(1999) Predator-induced changes of bacterial size-structure and productivity studied on an experimental microbial community. Aquatic Microbial Ecology, 18: 235-246.
Research impacted

Šimek, K., Kojecká, P., Nedoma, J., Hartman, P., Vrba, J., Dolan, J. R.*
(1999) Shifts in bacterial community composition associated with different microzooplankton size fractions in a eutrophic reservoir. Limnology and Oceanography, 44 (7): 1634-1644.
Research impacted

Nedoma, J., Vrba, J., Hanzl,T.
(1999) Kvantifikace vláknitých mikroorganismů a jejich výskyt v acidifikovaných jezerech Šumavy (Quantification of filamentous microorganisms and their occurrence in acidified Bohemian Forest lakes). In: Sládeková, D. (ed.), Zborník referátov prednesených na seminári: Nové poznatky v mikrobioológii vody VII, pp. 27-34. Poprad, September 29-October 1, 1999, Československá spoločnost´ mikrobiologická.
Others

Hejzlar, J. - Kopáček, J. - Vrba, J. - Čížková, R. - Komárková, J. - Šimek, K.
(1998) Limnological study of Plešné Lake in 1994-1995. 20 s. Silva Gabreta, 2, 155-174 (1998).
Research non impacted

Pernthaler, J. - Posch, T. - Šimek, K. - Vrba, J. - Psenner, R. - Amann, R.
(1998) Protisten-induzierte Populationsverschiebungen in einer experimentellen mikrobiellen Gemeinschaft. In: Neueste Entwicklungen in der in situ-Charakterisierung mikrobieller Biozönosen in Abwasser, Oberflächengewässern, Grund- und Trinkwasser. - München, Oldenbourg 1998. - 10 s.S. 117-126.
Research non impacted

Straškrabová, V. - Kopáček, J. - Procházková, L. - Vrba, J.
(1998) Die Versauerung der Seen im Böhmerwald, Ursachen, Trends und Folgen für die biologischen Prozesse und die Wasserqualität. In: Ergänzungsheft zum Tagungsband des Gewässerschutz und Wassernutzung im Einzugsgebiet der Elbe. - (Ed. Geller, W.). - Leipzig, B.G.Teubner Stuttgart 1998. - 4 s.S. 74-77.
Research non impacted

Šimek, K. - Babenzien, D. - Bittl, T. - Koschel, R. - Macek, M. - Nedoma, J. - Vrba, J.
(1998) Microbial Food Webs in an Artificially Divided Acidic Bog Lake. 16 s. International Revue der gesamten Hydrobiologie, 83 [1] 3-18 (1998).
Research impacted

Vrba, J.
(1998) Book review. 2 s. Silva Gabreta, 2, 409-410 (1998).
Research non impacted

Straškrabová, V. - Hartman, P. - Macek, M. - Nedoma, J. - Šimek, K. - Vrba, J.
(1997) S helikoptérou za mikroby horských jezer. In: Limnologický výzkum pro rozumné hospodaření s vodou. - (Ed. Lukavský, J.; Švehlová, D.). - Třeboň, ČLS, SLS 1997. - S. 188.
Others

Straškrabová, V. - Hartman, P. - Macek, M. - Šimek, K. - Vrba, J.
(1997) Podíl baktérií v biomase planktonu údolních nádrží. In: Limnologický výzkum pro rozumné hospodaření s vodou. - (Ed. Lukavský, J.; Švehlová, D.). - Třeboň, ČLS, SLS 1997. - S. 189-192.
Others

Šimek, K. - Hartman, P. - Kojecká, P. - Nedoma, J. - Pernthaler, J. - Posch, T. - Vrba, J.
(1997) Faktory ovlivňující diverzitu společenstev vodních bakterií: využití fluorescenčně značených RNA-sond. In: Limnologický výzkum pro rozumné hospodaření s vodou. - (Ed. Lukavský, J.; Švehlová, D.). - Třeboň, ČLS, SLS 1997. - S. 196-199.
Others

Šimek, K. - Hartman, P. - Nedoma, J. - Pernthaler, J. - Springmann, D. - Vrba, J. - Psenner, R.
(1997) Community structure, picoplankton grazing and zooplankton control of heterotrophic nanoflagellates in a eutrophic reservoir during the summer phytoplankton maximum. Aquatic Microbial Ecology, 12, 49-63 (1997).
Research impacted

Pernthaler, J., Šimek, K., Posch, T. - Vrba, J. - Amann, R. - Psenner, R.
(1997) Contrasting bacterial strategies to coexist with a flagellate predator in an experimental microbial assemblage. Applied and Environmental Microbiology, 63 [2] 596-601 (1997).
Research impacted

Šimek, K. - Vrba, J. - Pernthaler, J. - Posch, T. - Hartman, P. - Nedoma, J. - Psenner, R.
(1997) Morphological and compositional shifts in an experimental bacterial community influenced by protists with contrasting feeding modes. Applied and Environmental Microbiology, 63 [2] 587-595 (1997).
Research impacted

Vrba, J. - Kofroňová-Bobková, J. - Pernthaler, J. - Šimek, K. - Macek, M. - Psenner, R.
(1997) Extracellular, low-affinity β-N-acetylglucosaminidases linked to the dynamics of diatoms and crustaceans in freshwater systems of different trophic degree. Internationale Revue der gesamten Hydrobiologie, 82 [2] 277-286 (1997).
Research impacted

Vrba, J. - Kopáček, J. - Fott, J. - Hartman, P. - Hejzlar, J. - Komárková, J. - Macek, M. - Nedoma, J. - Straškrabová, V. - Šimek, K.
(1997) Limnologický výzkum šumavských jezer na sklonku 20. století. In: Limnologický výzkum pro rozumné hospodaření s vodou. - (Ed. Lukavský, J.; Švehlová, D.). - Třeboň, ČLS, SLS 1997. - S. 222-225.
Others

Macek, M. - Vrba, J. - Hartman, P. - Ramteke, P. - Ramirez, P.
(1996) Continuous-flow cultivation of Vibrio cholerae in the presenceof natural freshwater chitin. In: Chitin Enzymology. - (Ed. Muzzarelli, R. A. A.). - -, Atec Edizioni 1996. - S. 147-156.

Vrba, J. - Kopáček, J. - Straškrabová, V. - Hejzlar, J. - Šimek, K.
(1996) Limnological research of acidified lakes in Czech part of the Šumava Mountains: trophic status and dominance of microbial food webs. Silva Gabreta, 1: 151-164.
Research non impacted

Vrba, J. - Nedoma, J. - Filandr, P.
(1996) Resolving complex saturation kinetics: a potential tool in interpretationof extracellular β-N-acetylhexosaminidase data from natural freshwaters. In: Chitin Enzymology. - (Ed. Muzzareli, R. A. A.). - Atec Edizioni 1996. - S. 303-311.
Research non impacted

Vrba, J. - Nedoma, J. - Šimek, K. - Filandr, P.
(1996) Different sources of extracellular β-N-acetylhexosaminidase-like activities in freshwaters. In: Chitin Enzymology. - (Ed. Muzzareli, R. A. A.). - -, Atec Edizioni 1996. - S. 293-301.
Research non impacted

Vrba, J. - Šimek, K. - Pernthaler, J. - Psenner, R.
(1996) Evaluation of Extracellular, High-affinity β-N-acetylglucosaminidase Measurements from Freshwater Lakes: An Enzyme Assay to Estimate Protistan Grazing on Bacteria and Picocyanobaceria. Microbial Ecology, 32, 81-99 (1996).
Research impacted

Vrba, J. - Hartman, P. - Šimek, K.
(1995) Rychlé testy pro zjištění vlastností a identifikaci bakterií: využití komerčních fluorogenních substrátů. In: Nové ČSN ISO a STN ISO normy mikrobiologického rozboru vod. - (Ed. Tržilová, B.). - Brno, Československá spoločnosť mikrobiologická - Komisia mikrobiológie vody 1995. - S. 100-105.
Others

Vrba, J. - Vyhnálek, V. - Hejzlar, J. - Nedoma, J.
(1995) Comparison of phosphorus deficiency indices during a spring phytoplankton bloom in a eutrophic reservoir. Freshwater Biology, 33, [-] 73-81 (1995).
Research impacted

Nedoma, J. - Vrba, J. - Hejzlar, J. - Šimek, K. - Straškrabová, V.
(1994) N-acetylglucosamine dynamics in freshwater environments: Concentration of amino sugars, extracellular enzyme activities, and microbial uptake. Limnology and Oceanography, 39 [5] 1088-1100 (1994).
Research impacted

Straškrabová, V. - Komárková, J. - Macek, M. - Seďa, J. - Šimek, K. - Vrba, J. - Vyhnálek, V.
(1994) Microbial-algal-crustacean interactions in a reservoir under different fishstock. Ergebnisse der Limnologie. Archiv für Hydrobiologie Beiheft, 40, [-] 209-221 (1994.02.00).
Research non impacted

Straškrabová, V. - Vrba, J. - Šimek, K. - Nedoma, J.
(1994) Mikrobiologie kyselých horských jezer (Šumava). In: Nové metódy v mikrobiológii vody. - 6. - (Ed. Tržilová, B.). - Bratislava, Československá spoločnosť mikrobiologická, Komisia mikrobiológie vody 1994. - S. 97-104.
Others

Šimek, K. - Vrba, J. - Hartman, P.
(1994) Size-selective feeding by Cyclidium sp. on bacterioplanktnon and various sizes of cultured bacteria. FEMS Microbiology Ecology, 14 [2] 157-168 (1994).
Research impacted

Šimek, K. - Vrba, J. - Lavrentyev, P.
(1994) Estimates of protozoan bacterivory: From microscopy to ectoenzyme assay? Marine Microbial Food Webs, 8 [1/2] 71-85 (1994).
Research impacted

Vrba, J. - Macháček, J.
(1994) Release of dissolved extracellular β-N-acetylglucosaminidase during crustacean moulting. Limnology and Oceanography, 39 [3] 712-716 (1994).
Research impacted

Vrba, J. - Nedoma, J. - Šimek, K. - Hartman, P. - Macháček, J.
(1994) Aktivita extracelulárních hydroláz ve vodách: různá ekologická interpretace a význam. In: Zborník 10. Limnologickej konferencie. - Bratislava, Slovenská Limnologická spoločnosť 1994. - S. 240-244.
Others

Vyhnálek, V. - Hejzlar, J. - Nedoma, J. - Vrba, J.
(1994) Importance of the river inflow for the spring development of plankton in Římov Reservoir (Czechoslovakia). Ergebnisse der Limnologie. Archiv für Hydrobiologie Beiheft, 40, [-] 51-56 (1994.02.00).
Research non impacted

Vrba, J. - Komárková, J. - Vyhnálek, V.
(1993) Enhanced Activity of Alkaline Phosphatases - Phytoplankton Response to Epilimnetic Phosphorus Depletion. Water Science and Technology, 28 [6] 15-24 (1993).
Research impacted

Vrba, J. - Šimek, K. - Nedoma, J. - Hartman, P.
(1993) 4-Methylumbelliferyl-β-N-Acetylglucosaminide Hydrolysis by a High-Affnity Enzyme, a Putative Marker of Protozoan Bacterivory. Applied and Environmental Microbiology, 59 [9] 3091-3101 (1993).
Research impacted