Biblio

Posch, T., J. Jezbera, J. Vrba, K. Šimek, J. Pernthaler, S. Andreatta, and B. Sonntag. 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.

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

Vrba, J., J. Kopacek, and J. Fott. 2000. Long-term limnological research of the Bohemian Forest lakes and their recent status. Silva Gabreta 4: 7 - 27.

Straskrabova, V., J. Fott, P. Hartman, M. Macek, J. Nedoma, K. Šimek, and J. Vrba. 2000. Structure of pelagic food webs in low-alkalinity lakes - forested and alpine catchments. Silva Gabreta 4: 199 - 211.

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

Šimek, K., P. Kojecka, J. Nedoma, P. Hartman, J. Vrba, and J. R. Dolan. 1999. Shifts in bacterial community composition associated with different microzooplankton size fractions in a eutrophic reservoir. Limnology and Oceanography 44: 1634–1644.

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.