lIDÉ

1978 - 1984: Birgham Young University, Provo, UT, USA 

taxonomie, ekologie a systematika sinic

taxonomie, ekologie a systematika rozsivek

ekologie půdních krust

1994 - dosud: John Carroll University, Cleveland, OH, USA

2012 - dosud: Přírodovědecká fakulta JU

Johansen. J., Pokorný J., Hauerová R., Kaštovský J. (2026). Description of Flavicapitulum gen. nov. and two new species of Marmoreocelis from thermal habitats in the Americas. Journal of Phycology. https://doi.org/10.1111/jpy.70212  

Vondrášková A, Hauer T, Bengtsson R, Kaštovský J & Johansen JR (2024). Molecular characterization of two cyanobacterial generitypes from their type localities in Scandinavia. Journal of Phycology 61:119–131. https://doi.org/10.1111/jpy.13532 

Hasler P.,  Dvorak P., Johansen J. R., Kitner M., Ondrej V., Poulickova A. (2012): Morphological and molecular study of epipelic filamentous genera Phormidium, Microcoleus and Geitlerinema (Oscillatoriales, Cyanophyta/Cyanobacteria). Fottea 12(2): 341-356.

Vaccarino M. A., Johansen J. R. (2012): Brasilonema angustatum sp. nov. (Nostocales), a new filamentous cyanobacterial species from the Hawaiian Island. Journal of Phycology 48(5): 1178-1186.    

Perkerson R. B. Iii., Johansen J. R., Kováčik L., Brand J., Kaštovský J., Casamatta D.A. (2011): A unique Pseudanabaenalean (Cyanobacteria) genus Nodosilinea gen. nov. based on morphological and molecular data. Journal of Phycology 47(6): 1397-1412.

Pietrasiak N., Johansen J. R., La Doux T., Graham R. C. (2011): Comparison of disturbance impacts to and spatial distribution of biological soil crusts in the Little San Bernardino Mountains of Joshua Tree National Park, California. Western North American Naturalis 71(4): 539-552.

Bohunická M., Johansen J. R., Fučíková K. (2011): Tapinothrix clintonii sp. nov. (Pseudanabaenaceae, Cyanobacteria), a new species at the nexus of five genera. Fottea 11: 127-140.

Johansen J. R., Řeháková K., Acker F. (2011): Tapinothrix ozarkiana sp. nov., with notes on distribution of the genus for North America.  Fottea 11: 141-148.

Vaccarino M. A., Johansen J. R. (2011): Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands. Fottea 11: 149–161.

Pietrasiak N., Johansen J. R., R. E. Drenovsky (2011): Geologic composition influences distribution of microbiotic crusts in the Mojave and Colorado Deserts at the regional scale. Soil Biology & Biochemistry 43: 967-974.

Johansen J. R., Kovacik L., Casamatta D. A, Fučíková K., Kaštovský J. (2011): Utility of 16S-23S ITS sequence and secondary structure for recognition of intrageneric and intergeneric limits within cyanobacterial taxa: Leptolyngbya corticola sp. nov. (Pseudanabaenaceae, Cyanobacteria). Nova Hedwigia 92: 283-302.

Herrick J. E., Van Zee J. W.,Belnap J., Johansen J. R., Remmenga M. (2010):  Fine gravel controls hydrologic and erodibility responses to trampling disturbance for coarse-textured soils with weak cyanobacterial crusts. Catena 83: 119-126.

Khaybullina L., Gaysina L., Johansen J. R., Krautová M. (2010): Examination of the terrestrial algae of the Great Smoky Mountains National Park, USA.  Fottea 10: 201-215.

Furey P. C., Lowe R. L., Johansen J. R. (2009): Morphological deformities in Eunotia taxa from high elevation springs and streams in the Great Smoky Mountains National Park, with a description of Eunotia macroglossa sp. nov. Diatom Research,24: 273-290.

Veselá J., Johansen J. R. (2009):  The diatom flora of headwater streams in the Elbsandsteingebirge Region of the Czech Republic. Diatom Research 24: 443-477.

Lukešová A., Johansen J. R., Martin M. P.,Casamatta D. A. (2009): Aulosira bohemensis sp. nov.: further phylogenetic uncertainty at the base of the Nostocales (Cyanobacteria).  Phycologia 48: 118-129.

Thomas E. W., Kociolek J. P., Lowe R. L., Johansen J. R. (2009): Taxonomy, ultrastructure and distribution of gomphonemoid diatoms (Bacillariophyceae) from Great Smoky Mountains National Park (U.S.A.). Nova Hedwigia, Beiheft 135: 201-237.

Flechtner, V.R., Johansen J. R., Belnap J. (2008): The biological soil crusts of the San Nicolas Island: enigmatic algae from a geographically isolated ecosystem. Western North American Naturalist 68: 405-436.

Johansen J. R., Kociolek J. P., Lowe R. L. (2008): Spicaticribra kingstonii, gen. nov. et sp. nov. (Thalassiosiraceae, Bacillariophyta) from Great Smoky Mountains National Park, USA. Diatom Research 23: 367-375.

Sigiesmund M. A., Johansen J. R., Karsten U., Friedl T. (2008): Coleofasciculus gen. nov. (Cyanobacteria): morphological and molecular criteria for revision of the genus Microcoleus Gomont. Journal of Phycology 44: 1572-1585

Fučíková K., Hall J. D., Johansen J. R. and Lowe R. L. (2008): Desmid flora of the Great Smoky Mountains National Park, USA. Bibliotheca Phycologica 113: 1-59.

Johansen J. R., Olsen C. E., Lowe R. L., Fučíková K., Casamatta D. A. (2008): Leptolyngbya species from selected seep walls in the Great Smoky Mountains National Park. Algological Studies 126:21-36.

Kaštovský J., Johansen J. R. (2008): Mastigocladus laminosus (Stigonematales, Cyanobacteria): phylogenetic relationship of the strains from thermal springs to the soil-inhabiting genera of the order, and taxonomic implications for the genus.  Phycologia 47: 307-320.

Miller N., Johansen J. R. (2008): Observations on a diminutive form of Thalassiosira lacustris (Grunow) Hasle from Ohio.  Nova Hedwigia, Beiheft 133: 101-111.

Belnap J., Phillips S. L., Herrick S. E., Johansen J. R. (2007): Wind erodibility of soils at Ft. Irwin, CA (Mojave Desert) before and after trampling disturbance: Implications for land management: Earth Surface Processes and Landforms 32: 75-84.

Furey P.C., Lowe R. L., Johansen J. R. (2007): Wet wall algal community response to in-field nutrient manipulation in the Great Smoky Mountains National Park, U.S.A. Algological Studies 125: 17-43.

Johansen J. R., Lowe R. L. (2007): Draparnaldia appalachiana sp. nov. (Chaetophoraceae, Chlorophyceae) from the Great Smoky Mountains National Park. Algological Studies 123: 35-45.

Johansen J. R., Lowe R. L., Carty S., Fučiková K., Olsen C. E., Fitzpatrick M. H., Ress J. A., Furey P. C. (2007): New algal species records for the Great Smoky Mountains National Park, with an annotated checklist of all reported taxa from the park.  Southeastern Naturalist, Special Issue 1: 99-134.

Lowe R. L., Furey P. C., Ress J. A., Johansen J. R. (2007): Diatom biodiversity and distribution on wetwalls in the Great Smoky Mountains National Park.  Southeastern Naturalist, Special Issue 1: 135-152.

Řeháková K., Johansen J. R.,Casamatta D. A., Xuesong L., Vincent J. (2007): Morphological and molecular characterization of selected desert soil cyanobacteria: Three species new to science including Mojavia pulchra gen. et sp. nov.  Phycologia 46: 481-502.

Sgro G. V.,Reavie E. D., Kingston J. C., Kireta A. R., Ferguson M. J., Danz N. P., Johansen J. R. (2007): A diatom quality index from a diatom-based total phosphorus inference model.  Environmental Bioindicators 2: 15-34.

Sgro G. V., Poole J. B., Johansen J. R. (2007): Diatom Species Composition and Ecology of the Animas River Watershed, Colorado, USA. Western North American Naturalist 67: 510-519.

St. Clair L. L., Johansen J. R., St. Clair S. B., Knight K. B. (2007): The influence of grazing and other environmental factors on lichen community structure along an alpine tundra ridge in the Uinta Mountains, Utah, USA.  Arctic, Antarctic, and Alpine Research 39: 603-13. 

Casamatta D. A., Gomez S. R., Johansen J. R. (2006): Rexia erecta gen. et sp. nov. and Capsosira lowei sp. nov., two newly described cyanobacterial taxa from the Great Smoky Mountain National Park (USA). Hydrobiologia 561: 13-26.

Jog S. K., Johansen J. R., Delong M. K., Magee D. (2006): Plant Communities of Highland heights community Park, Cuyahoga County, Ohio.  Ohio Journal of Science 106: 174-180.

Sgro G. V., Ketterer M., Johansen J. R. (2006): Ecology and assessment of the benthic diatom communities of four Lake Erie estuaries using Lange-Bertalot Tolerance values. Hydrobiologia 561: 239-249.

Casamatta D. A., Johansen J. R., Vis M. L., Broadwater S. T. (2005): Molecular and ultrastructural characterization of ten polar and near-polar strains within the Oscillatoriales (Cyanobacteria). Journal of Phycology 41: 421-438.

Delong M. K., Jog S. K., Johansen J. R., Wilder G. J. (2005): Floristic survey of a highly disturbed wetland within Shaker Median Park, Beachwood (Cuyahoga County), Ohio. Ohio Journal of Science 105: 102-115.

Johansen J. R., Casamatta D. A. (2005): Recognizing cyanobacterial diversity through adoption of a new species paradigm.  Algological Studies 116: 71-93.

Johansen J. R., Fučíková K., Fitzpatrick M. H., Lowe R. L. (2005): The red algal genus Rhodospora (Bangiophycidae, Rhodophyta): first report from North America.  Journal of Phycology 41: 1281-1283.

S. K. Jog, Kartesz J. T., Johansen J. R. and Wilder G. J. (2005): Floristic study of Highland Heights Community Park, Cuyahoga Co., Ohio. Castanea 70: 136-145.

Nagy M. L., Johansen J. R., St. Clair L. L., Webb B. L. (2005): Impact of elevated arsenic on microbiotic soil crusts 70 years after contamination. Journal of Arid Environments 63: 304-323.

Johansen J. R., Lowe R. L., Gomez S. R., Kociolek J. P., Makosky S. A. (2004): New algal species records for the Great Smoky Mountains National Park, U.S.A., with an annotated checklist of all reported algal species for the park. Algological Studies 111: 17-44.

George D. B., Roundy B.A., St. Clair L. L., Johansen J. R., Schaalje G. B., Webb B. L. (2003): The effects of microbiotic soil crusts on soil water loss. Arid Land Research and Management 17: 113-125.

Gomez S. R., Johansen J. R., Lowe R. L. (2003): Epilithic Aerial Algae of Great Smoky Mountains National Park. Biologia, Bratislava 58: 603-615.

Kubečková K., Johansen J. R., Warren S. D., R. L. Sparks (2003): Development of immobilized cyanobacterial amendments for reclamation of microbiotic soil crusts. Algological Studies 109: 341-362.

Neher D. A., Walters T. L., Tramer E., Weicht T. R., Veluci R. M., Saiya-Cork K., Will-wolf S., Toppin J., Traub J., Johansen J. R. (2003): Biological soil crust and vascular plant communities in a sand savanna of northwestern Ohio. Journal of the Torrey Botanical Society 130: 244-252.

Rosati T. C., J. R. Johansen and Coburn M. M. (2003): Cyprinid fishes as samplers of benthic diatom communities in freshwater streams of varying water quality.  Canadian Journal of Fisheries and Aquatic Sciences 60: 117-125.