Biblio

Hejzlar, J., J. Kopacek, J. Vrba, H. Cizkova, J. Komarkova, and K. Šimek. 1998. Limnological study of Plešné Lake in 1994-1995. Silva Gabreta 2: 155-174.

Šimek, K., D. Babenzien, T. Bittl, R. Koschel, M. Macek, J. Nedoma, and J. Vrba. 1998. Microbial food webs in an artificially divided acidic bog lake. International Review of Hydrobiology 83: 3–18.

Šimek, K., P. Hartman, J. Nedoma, J. Pernthaler, D. Springmann, J. Vrba, and R. Psenner. 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.

Pernthaler, J., T. Posch, K. Šimek, J. Vrba, R. Amann, and R. Psenner. 1997. Contrasting bacterial strategies to coexist with a flagellate predator in an experimental microbial assemblage. Applied and Environmental Microbiology 63: 596–601.

Vrba, J., J. Kofronova-Bobkova, J. Pernthaler, K. Šimek, M. Macek, and R. Psenner. 1997. Extracellular, low-affinity beta-N-acetylglucosaminidases linked to the dynamics of diatoms and crustaceans in freshwater systems of different trophic degree. Internationale Revue Der Gesamten Hydrobiologie 82: 277–286.

Šimek, K., J. Vrba, J. Pernthaler, T. Posch, P. Hartman, J. Nedoma, and R. Psenner. 1997. Morphological and compositional shifts in an experimental bacterial community influenced by protists with contrasting feeding modes. Applied and Environmental Microbiology 63: 587–595.

Macek, M., J. Vrba, P. Hartman, P. Ramteke, and P. Ramirez. 1996. Continuous-flow cultivation of Vibrio cholerae in the presence of natural freshwater chitin R.A.A. Muzzarelli [ed.]. Chitin enzymology 2: 147-156.

Vrba, J., P. Filandr, J. Nedoma, and K. Šimek. 1996. Different sources of extracellular beta-N-acetylhexosaminidase-like activities in freshwaters R.A.A. Muzzarelli [ed.]. Chitin enzymology 2: 293 - 301.

Vrba, J., K. Šimek, J. Pernthaler, and R. Psenner. 1996. Evaluation of extracellular, high-affinity beta-N-acetylglucosaminidase measurements from freshwater lakes: An enzyme assay to estimate protistan grazing on bacteria and picocyanobacteria. Microbial Ecology 32: 81–99.

Vrba, J., J. Kopacek, V. Straskrabova, J. Hejzlar, and K. Šimek. 1996. Limnological research of acidified lakes in Czech part of the Sumava Mountains: trophic status and dominance of microbial food webs. Silva Gabreta 1: 151 - 164.

Hejzlar, J., J. Kopacek, J. Vrba, H. Cizkova, J. Komarkova, and K. Šimek. 1996. Limnological study of Plesne Lake in 1994-1995. Silva Gabreta 2: 155 - 174.

Vrba, J., J. Nedoma, and P. Filandr. 1996. Resolving complex saturation kinetics: a potential tool in interpretation of extracellular beta-N-acetylhexosaminidase data from natural freshwaters R.A.A. Muzzarelli [ed.]. Chitin enzymology 2: 303-311.

Vrba, J., V. Vyhnalek, J. Hejzlar, and J. Nedoma. 1995. Comparison of Phosphorus Deficiency-indexes During A Spring Phytoplankton Bloom In A Eutrophic Reservoir. Freshwater Biology 33: 73–81.

Šimek, K., J. Vrba, and P. Lavrentyev. 1994. Estimates of protozoan bacterivory: From microscopy to ectoenzyme assay?. Marine Microbial Food Webs 8: 71–85.

Straskrabova, V., J. Komarkova, M. Macek, J. Seda, K. Šimek, J. Vrba, and V. Vyhnalek. 1994. Microbial-algal-crustacean interactions in a reservoir under different fishstock. ADVANCES IN LIMNOLOGY, VOL 40 - PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON RESERVOIR LIMNOLOGY AND WATER QUALITY 40: 209-221.

Nedoma, J., J. Vrba, J. Hejzlar, K. Šimek, and V. Straskrabova. 1994. N-acetylglucosamine dynamics in freshwater environment: concentration of amino-sugars, extracellular enzyme activities, and microbial uptake. Limnology and Oceanography 39: 1088-1100.

Vrba, J., and J. Machacek. 1994. Release of Dissolved Extracellular Beta-n-acetylglucosaminidase During Crustacean Molting. Limnology and Oceanography 39: 712–716.

Šimek, K., J. Vrba, and P. Hartman. 1994. Size-selective feeding by Cyclidium sp. on bacterioplankton and various sizes of cultured bacteria. FEMS Microbiology Ecology 14: 157–167.

Vrba, J., K. Šimek, J. Nedoma, and P. Hartman. 1993. 4-methylumbelliferyl-beta-N-acetylglucosaminide hydrolysis by a high-affinity enzyme, a putative marker of protozoan bacterivory. Applied and Environmental Microbiology 59: 3091–3101.

Vrba, J., J. Komarkova, and V. Vyhnalek. 1993. Enhanced Activity of Alkaline-phosphatases - Phytoplankton Response To Epilimnetic Phosphorus Depletion. Water Science and Technology 28: 15–24.

Vyhnalek, V., J. Hejzlar, J. Nedoma, and J. Vrba. 1993. Importance of the River Inflow For the Spring Development of Plankton In Rimov Reservoir (czechoslovakia). Advances In Limnology, Vol 40 - Proceedings of the Second International Conference On Reservoir Limnology and Water Quality 40: 51–56.

Straskrabova, V., J. Komarkova, M. Macek, J. Seda, K. Šimek, J. Vrba, and V. Vyhnalek. 1993. Microbial algal crustacean interactions in a reservoir under different fishstock. Archiv für Hydrobiologie Beihefte Ergebnisse der Limnologie 40: 209–221.

Vrba, J., J. Nedoma, K. Šimek, and J. Seda. 1992. Microbial decomposition of polymer organic matter related to plankton development in a reservoir - activity of alpha-glucosidase, beta-glucosidase, and beta-N-acetylglucosaminidase and uptake of N-acetylglucosamine. Archiv für Hydrobiologie 126: 193–211.

Vrba, J. 1992. Seasonal extracellular enzyme activities in decomposition of polymeric organic matter in a reservoir. Archiv für Hydrobiologie Beihefte Ergebnisse der Limnologie 37: 33-42.

Vrba, J. 1990. Effect of periodic illumination on nitrification in the continuous cultivation. Archiv für Hydrobiologie Beihefte Ergebnisse der Limnologie 34: 145–450.