No events are planned

Johansen Jeffrey Randolph

Professor, Ph.D.
Born December 11, 1953

  • Botany, specialization in Phycology
  • Member of Learned Society since 2017

Educational and professional preparation

  • 2014, Sabbatical Stay, Department of Botany, Faculty of Science, University of South Bohemia, České Budějovice, CZ
  • 1986-88, Postdoctoral Visiting Professional, Solar Energy Research Institute, Golden, Colorado, USA
  • 1984-86, Postdoctoral Fellowship, Washington State University, Pullman, Washington, USA
  • 1984, Ph.D. in Botany, Brigham Young University, Provo,Utah, USA
  • 1980-82, Graduate studies, Department of Oceanography, Texas A&M University, College Station, Texas, USA
  • 1980, M.S. in Botany, Brigham Young University, Provo,Utah, USA
  • 1978, B.S. in Botany, Brigham Young University, Provo,Utah, USA

Employment and academic positions

  • 2012-now, Professor, Department of Botany, Faculty of Sciences, University of South Bohemia, České Budějovice, CZ
  • 2000-now, Professor, Department of Biology, John Carroll University, University Heights, Ohio, USA
  • 1994-2000, Associate Professor, Department of Biology, John Carroll University, University Heights, Ohio, USA
  • 1988-1994, Assistant Professor, Department of Biology, John Carroll University, University Heights, Ohio, USA

Membership in selected domestic scientific bodies

  • Czech Phycological Society
  • Phi Kappa Phi Honor Society
  • Phycological Society of America
  • Sigma Xi

Membership and positions in selected international organizations and societies

  • 2017-now, Associate Editor, Bibliotheca Phycologica
  • 1999-2002, 2016-now, Editorial Board, Journal of Phycology
  • 2003-2007, Editor, Diatom Research
  • 2003-2006, Secretary, Phycological Society of America
  • 1999-2007, Associate Editor, Nova Hedwigia
  • 1999-now, International Association for Cyanophyte Research
  • 1989-now, International Diatom Society
  • 1989-now, Board of Editorial Advisors, Phycologia
  • 1984-now, International Phycological Society

Notable awards

  • 2016, Distinguished Faculty Award, John Carroll University, University Heights, Ohio, USA
  • 2012, Doctor Honoris Causa, University of South Bohemia, České Budějovice, CZ
  • 2009, Honorary Professor, Bashkir State Pedagogical University, Ufa, Bashkortostan, Russia

Selected publications

  • Shalygin, S., Shalygina, R., Johansen, J.R., Pietrasiak, N., Berrendero, E., Bohunická, M., Mareš, J. and Sheil, C. 2017. Cyanomargarita gen. nov. (Nostocales, Cyanobacteria): convergent evolution resulting in a cryptic genus. Journal of Phycology 53:762-777.
  • Strunecký, O., Bohunická, M., Johansen, J.R., Čapková, K., Raabová, L., Dvořák, P. and Jiří Komárek. 2017. A revision of the genus Geitlerinema and a description of the genus Anagnostidinema gen. nov. (Oscillatoriophycidae, Cyanobacteria). Fottea, Olomouc 17: 114–126.
  • Hentschke, G.S., Johansen, J.R., Pietrasiak, N., Rigonato, J., Fiore, M.F. and Sant'Anna, C.L. 2017. Komarekiella atlantica gen. et sp. nov. (Nostocaceae, Cyanobacteria): a new subaerial taxon from the Atlantic Rainforest and Kauai, Hawaii. Fottea, Olomouc 17: 178-190.
  • Berrendero Gomez, E., Johansen, J.R., Kaštovský, J., Bohunická, M. and Čapková, K. 2016. Macrochaete gen. nov. (Nostocales, Cyanobacteria), a taxon morphologically and molecularly distinct from Calothrix. Journal of Phycology 52: 638–655.
  • Hentschke, G.S., J.R. Johansen, N. Pietrasiak, M.F. Fiore, J. Rigonato, C.L. Sant'Anna and J. Komárek. 2016. Phylogenetic placement of Dapisostemon gen. nov. and Streptostemon, two tropical heterocytous genera (Cyanobacteria). Phytotaxa 245 (2): 129-143.
  • Bohunická, M., Pietrasiak, N., Johansen, J.R., Berrendero-Gomez, E., Hauer, T., Gaysina, L., Lukešová, A. 2015. Roholtiella, gen. nov. (Nostocales, Cyanobacteria) - a tapering and branching member of the Nostocaceae (Cyanobacteria). Phytotaxa 197(2): 84-103.
  • Fučíková, K., J.R. Johansen and J.D. Hall. 2015. A contribution to the desmid flora of Southeastern Maine. Journal of the Torrey Botanical Society 142(2):166-178.
  • Komárek, J. and J.R. Johansen. 2015. Coccoid Cyanobacteria. Pages 75-133 in: Wehr, J.D., R.G. Sheath and J.P. Kociolek (eds.) Freshwater Algae of North America, 2nd Edition. Academic Press, London.
  • Komárek, J. and J.R. Johansen. 2015. Filamentous Cyanobacteria. Pages 135-235 in: Wehr, J.D., R.G. Sheath and J.P. Kociolek (eds.) Freshwater Algae of North America, 2nd Edition. Academic Press, London.
  • Řeháková, K., J.R. Johansen, M.B. Bowen, M.P. Martin and C.A. Sheil. 2014. Variation in secondary structure of the 16S rRNA molecule in cyanobacteria with implications for phylogenetic analysis. Fottea, Olomouc 14: 161–178.
  • Wilde, S.B., J.R. Johansen, H.D. Wilde, P. Jiang, B.A. Bartelme and R.S. Haynie. 2014. Aetokthonos hydrillicola gen. et sp. nov.: Epiphytic cyanobacteria associated with invasive aquatic plants and implicated in bird deaths from Avian Vacuolar Myelinopathy. Phytotaxa 181 (5): 243-260.
  • Komárek, J., J. Kaštovsky, J. Mareš, and J.R. Johansen. 2014. Taxonomic classification of cyanoprokaryotes (cyanobacterial genera) 2014 according to the polyphasic approach. Preslia 86: 295–335.
  • Hauer, T., Mareš, J., Bohunická, M., Johansen, J.R. and Berrendero-Gomez, E. 2014. Heterogeneity of the cyanobacterial genus Microchaete: reassessment of the family Microchaetaceae and establishment of new families Tolypothrichaceae and Godleyaceae. Journal of Phycology 50:1089–1100.
  • Osorio-Santos, K., N. Pietrasiak, M. Bohunická, L. Miscoe, L. Kovacik, M.P. Martin and J.R. Johansen. 2014. Seven new species of Oculatella (Pseudanabaenales, Cyanobacteria): taxonomically recognizing cryptic diversification. European Journal of Phycology 49: 450–470.
  • Johansen, J.R., M. Bohunická, A. Lukešová, K.  Hrčková, M.A. Vaccarino and N.M. Chesarino. 2014. Morphological and molecular characterization within 26 strains of the genus Cylindrospermum (Nostocaceae, Cyanobacteria), with descriptions of three new species. Journal of Phycology 50: 187-202.

Web site

Back to the list of articles



Reaction to the case of Tomáš Hudlický: Members of the Learned Society of the Czech Republic support the freedom of expression

„We believe that free exchange of ideas is a key condition for the pursuit of truth and that the honest opinions should be scrutinized, challenged or rebutted but not censored or suppressed,“ say 45 members of the Learned Society in a statement regarding the retracted opinion paper by Prof. Tomáš Hudlický.


The letter by Jan Konvalinka to the President and Vice-Chancellor of the Brock University regarding the retracted article of Prof. Tomáš Hudlický

Opinions could and should be challenged, questioned or refuted but never silenced. In order to be able to think, we have to have the right to inquire, question and even offend or be mistaken,” writes Assoc. Prof. Jan Konvalinka, a biochemist at the IOCB Prague and the Vice-Rector of the Charles University, to Gervan Fearon.


Prof Miroslav Bárta receives the Česká hlava National Government Award

Learned Society member, Prof. Mgr. Miroslav Bárta, Dr. (Charles University Faculty of Arts) received the Česká hlava (Czech Head) National Government Award on 25 November 2019. A renowned Czech Egyptologist and archaeologist, Professor Bárta researches the history of ancient civilisations, the human relationship to the natural environment, and also for many years the evolution of complex societies. He leads the Czech Institute of Egyptology for archaeological and environmental research in Egypt and Sudan. His principal research interest is the period of the pyramid builders of the Old Kingdom.