People

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

taxonomy, ecology and systematics of Cyanobacteria and Diatoms

ecology of soil crusts

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

2012 - now: Faculty of Science, University of South Bohemia

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.