All Stories

  1. Rivularia halophila sp. nov. (Nostocales, Cyanobacteria): the first species of Rivularia described with the modern polyphasic approach

    Article • European Journal of Phycology, October 2018, Taylor & Francis

    Professor Jeffrey R. Johansen, estela cecilia mlewski

  2. Two new species of Phyllonema (Rivulariaceae, Cyanobacteria) with an emendation of the genus

    Article • Journal of Phycology, September 2018, Wiley

    Professor Jeffrey R. Johansen

  3. Cyanomargaritagen. nov. (Nostocales, Cyanobacteria): convergent evolution resulting in a cryptic genus

    Article • Journal of Phycology, May 2017, Wiley

    Professor Jeffrey R. Johansen

  4. Macrochaetegen. nov. (Nostocales, Cyanobacteria), a taxon morphologically and molecularly distinct fromCalothrix

    Article • Journal of Phycology, June 2016, Wiley

    Professor Jeffrey R. Johansen

  5. Biological Soil Crust Response to Late Season Prescribed Fire in a Great Basin Juniper Woodland

    Article • Rangeland Ecology & Management, May 2015, Elsevier

    Professor Jeffrey R. Johansen

  6. A contribution to the desmid flora of Southeastern Maine 1

    Article • The Journal of the Torrey Botanical Society, April 2015, Torrey Botanical Society

    Professor Jeffrey R. Johansen

  7. Roholtiella, gen. nov. (Nostocales, Cyanobacteria)—a tapering and branching cyanobacteria of the family Nostocaceae

    Article • Phytotaxa, February 2015, Magnolia Press

    Professor Jeffrey R. Johansen

  8. Coccoid Cyanobacteria

    Article • January 2015, Elsevier

    Professor Jeffrey R. Johansen

  9. Filamentous Cyanobacteria

    Article • January 2015, Elsevier

    Professor Jeffrey R. Johansen

  10. Characterization of Hawaiian freshwater and terrestrial cyanobacteria reveals high diversity and numerous putative endemics

    Article • Phycological Research, December 2014, Wiley

    Professor Jeffrey R. Johansen

  11. Phylogenetic placement of Symplocastrum (Phormidiaceae, Cyanophyceae) with a new combination S. californicum and two new species: S. flechtnerae and S. torsivum

    Article • Phycologia, November 2014, International Phycological Society

    Professor Jeffrey R. Johansen

  12. Reassessment of the cyanobacterial family M icrochaetaceae and establishment of new families T olypothrichaceae and G odleyaceae

    Article • Journal of Phycology, October 2014, Wiley

    Professor Jeffrey R. Johansen

  13. The Hawaiian freshwater algae biodiversity survey (2009-2014): systematic and biogeographic trends with an emphasis on the macroalgae

    Article • BMC Ecology, October 2014, Springer Science + Business Media

    Professor Jeffrey R. Johansen

  14. Cyanocohniella calida gen. et sp. nov. (Cyanobacteria: Aphanizomenonaceae) a new cyanobacterium from the thermal springs from Karlovy Vary, Czech Republic

    Article • Phytotaxa, October 2014, Magnolia Press

    Professor Jeffrey R. Johansen

  15. Aetokthonos hydrillicola gen. et sp. nov.: Epiphytic cyanobacteria on invasive aquatic plants implicated in Avian Vacuolar Myelinopathy

    Article • Phytotaxa, October 2014, Magnolia Press

    Professor Jeffrey R. Johansen

  16. Seven new species ofOculatella(Pseudanabaenales, Cyanobacteria): taxonomically recognizing cryptic diversification

    Article • European Journal of Phycology, October 2014, Taylor & Francis

    Professor Jeffrey R. Johansen

  17. Variation in secondary structure of the 16S rRNA molecule in cyanobacteria with implications for phylogenetic analysis.

    Article • Fottea, September 2014, Palacky University Olomouc

    Professor Jeffrey R. Johansen

  18. Three new Eunotia (Bacillariophyta) species from Acadia National Park, Maine, USA

    Article • Phytotaxa, August 2014, Magnolia Press

    Professor Jeffrey R. Johansen

  19. Biodiversity of soil cyanobacteria in the hyper-arid Atacama Desert, Chile

    Article • Journal of Phycology, June 2014, Wiley

    Professor Jeffrey R. Johansen

  20. Polyphasic characterization of Trichocoleus desertorum sp. nov. (Pseudanabaenales, Cyanobacteria) from desert soils and phylogenetic placement of the genus Trichocoleus

    Article • Phytotaxa, March 2014, Magnolia Press

    Professor Jeffrey R. Johansen

  21. Polyphasic characterization of Kastovskya adunca gen. nov. et comb. nov. (Cyanobacteria: Oscillatoriales), from desert soils of the Atacama Desert, Chile

    Article • Phytotaxa, March 2014, Magnolia Press

    Professor Jeffrey R. Johansen

  22. Morphological and molecular characterization within 26 strains of the genusCylindrospermum(Nostocaceae, Cyanobacteria), with descriptions of three new species

    Article • Journal of Phycology, January 2014, Wiley

    Professor Jeffrey R. Johansen, Dr Nicholas Chesarino

  23. Surirella terryiandS. cruciata: two rare diatoms from North America

    Article • Diatom Research, December 2013, Taylor & Francis

    Professor Jeffrey R. Johansen

  24. Molecular and morphological criteria for revision of the genusMicrocoleus(Oscillatoriales, Cyanobacteria)

    Article • Journal of Phycology, November 2013, Wiley

    Professor Jeffrey R. Johansen

  25. Molecular data show the enigmatic cave-dwelling diatomDiprora(Bacillariophyceae) to be a raphid diatom

    Article • European Journal of Phycology, November 2013, Taylor & Francis

    Professor Jeffrey R. Johansen

  26. Biological soil crust community types differ in key ecological functions

    Article • Soil Biology and Biochemistry, October 2013, Elsevier

    Professor Jeffrey R. Johansen, Professor Louis S. Santiago

  27. Morphological and molecular study of epipelic filamentous genera Phormidium, Microcoleus and Geitlerinema (Oscillatoriales, Cyanophyta/Cyanobacteria).

    Article • Fottea, September 2012, Palacky University Olomouc

    Professor Jeffrey R. Johansen, Miloslav Kitner

  28. BRASILONEMA ANGUSTATUMSP. NOV. (NOSTOCALES), A NEW FILAMENTOUS CYANOBACTERIAL SPECIES FROM THE HAWAIIAN ISLANDS1

    Article • Journal of Phycology, July 2012, Wiley

    Professor Jeffrey R. Johansen

  29. The Algal Flora of Acadia National Park, Maine

    Article • Northeastern Naturalist, December 2011, Humboldt Field Research Institute

    Professor Jeffrey R. Johansen

  30. Comparison of Disturbance Impacts to and Spatial Distribution of Biological Soil Crusts in the Little San Bernardino Mountains of Joshua Tree National Park, California

    Article • Western North American Naturalist, December 2011, Western North American Naturalist

    Professor Jeffrey R. Johansen

  31. A UNIQUE PSEUDANABAENALEAN (CYANOBACTERIA) GENUS NODOSILINEA GEN. NOV. BASED ON MORPHOLOGICAL AND MOLECULAR DATA1

    Article • Journal of Phycology, November 2011, Wiley

    Professor Jeffrey R. Johansen

  32. Geologic composition influences distribution of microbiotic crusts in the Mojave and Colorado Deserts at the regional scale

    Article • Soil Biology and Biochemistry, May 2011, Elsevier

    Professor Jeffrey R. Johansen

  33. 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)

    Article • Nova Hedwigia, May 2011, Schweizerbart

    Professor Jeffrey R. Johansen

  34. Tapinothrix ozarkiana sp. nov., with notes on distribution for the genus in North America.

    Article • Fottea, March 2011, Palacky University Olomouc

    Professor Jeffrey R. Johansen

  35. Scytonematopsis contorta sp. nov. (Nostocales), a new species from the Hawaiian Islands.

    Article • Fottea, March 2011, Palacky University Olomouc

    Professor Jeffrey R. Johansen

  36. Tapinothrix clintonii sp. nov. (Pseudanabaenaceae, Cyanobacteria), a new species at the nexus of five genera.

    Article • Fottea, March 2011, Palacky University Olomouc

    Professor Jeffrey R. Johansen

  37. Cyanobacteria in Soils from a Mojave Desert Ecosystem

    Article • Monographs of the Western North American Naturalist, January 2011, Western North American Naturalist

    Professor Jeffrey R. Johansen

  38. Examination of the terrestrial algae of the Great Smoky Mountains National Park, USA.

    Article • Fottea, September 2010, Palacky University Olomouc

    Professor Jeffrey R. Johansen

  39. TERATOLOGY INEUNOTIATAXA IN THE GREAT SMOKY MOUNTAINS NATIONAL PARK AND DESCRIPTION OFEUNOTIA MACROGLOSSASP. NOV.

    Article • Diatom Research, November 2009, Taylor & Francis

    Professor Jeffrey R. Johansen

  40. THE DIATOM FLORA OF EPHEMERAL HEADWATER STREAMS IN THE ELBSANDSTEINGEBIRGE REGION OF THE CZECH REPUBLIC

    Article • Diatom Research, November 2009, Taylor & Francis

    Professor Jeffrey R. Johansen

  41. Aulosira Bohemensis sp. nov.: Further Phylogenetic Uncertainty at The Base of The Nostocales (Cyanobacteria)

    Article • Phycologia, March 2009, International Phycological Society

    Professor Jeffrey R. Johansen

  42. COLEOFASCICULUSGEN. NOV. (CYANOBACTERIA): MORPHOLOGICAL AND MOLECULAR CRITERIA FOR REVISION OF THE GENUSMICROCOLEUSGOMONT1

    Article • Journal of Phycology, December 2008, Wiley

    Professor Jeffrey R. Johansen

  43. The Biological Soil Crusts of the San Nicolas Island: Enigmatic Algae from a Geographically Isolated Ecosystem

    Article • Western North American Naturalist, December 2008, Western North American Naturalist

    Professor Jeffrey R. Johansen

  44. SPICATICRIBRA KINGSTONII, GEN. NOV. ET SP. NOV. (THALASSIOSIRALES, BACILLARIOPHYTA) FROM GREAT SMOKY MOUNTAINS NATIONAL PARK, U.S.A.

    Article • Diatom Research, November 2008, Taylor & Francis

    Professor Jeffrey R. Johansen

  45. Mastigocladus Laminosus (Stigonematales, Cyanobacteria): Phylogenetic Relationship of Strains from Thermal Springs to Soil-Inhabiting Genera of The Order and Taxonomic Implications for The Genus

    Article • Phycologia, May 2008, International Phycological Society

    Professor Jeffrey R. Johansen

  46. Diatom Biodiversity and Distribution on Wetwalls in Great Smoky Mountains National Park

    Article • Southeastern Naturalist, December 2007, Humboldt Field Research Institute

    Professor Jeffrey R. Johansen

  47. New Algal Species Records for Great Smoky Mountains National Park, with an Annotated Checklist of all Reported Algal Taxa for The Park

    Article • Southeastern Naturalist, December 2007, Humboldt Field Research Institute

    Professor Jeffrey R. Johansen

  48. Wet wall algal community response to in-field nutrient manipulation in the Great Smoky Mountains National Park, U.S.A.

    Article • Algological Studies, November 2007, Schweizerbart

    Professor Jeffrey R. Johansen

  49. Morphological and molecular characterization of selected desert soil cyanobacteria: three species new to science including Mojavia pulchra gen. et sp. Nov

    Article • Phycologia, September 2007, International Phycological Society

    Professor Jeffrey R. Johansen

  50. Draparnaldia appalachiana sp. nova (Chaetophoraceae, Chlorophyceae) from the Great Smoky Mountains National Park

    Article • Algological Studies, May 2007, Schweizerbart

    Professor Jeffrey R. Johansen

  51. THE RELATIONSHIP BETWEEN VALVE DIAMETER AND NUMBER OF CENTRAL FULTOPORTULAE IN THALASSIOSIRA WEISSFLOGII (BACILLARIOPHYCEAE)1

    Article • Journal of Phycology, April 2007, Wiley

    Professor Jeffrey R. Johansen

  52. A Diatom Quality Index from a Diatom-Based Total Phosphorus Inference Model

    Article • Environmental Bioindicators, March 2007, Taylor & Francis

    Professor Jeffrey R. Johansen

  53. Ecology and Assessment of the Benthic Diatom Communities of Four Lake Erie Estuaries using Lange-Bertalot Tolerance Values

    Article • Hydrobiologia, May 2006, Springer Science + Business Media

    Professor Jeffrey R. Johansen

  54. Rexia erecta Gen. et sp. nov. and Capsosira lowei sp. nov., Two Newly Described Cyanobacterial Taxa from the Great Smoky Mountains National Park (USA)

    Article • Hydrobiologia, May 2006, Springer Science + Business Media

    Professor Jeffrey R. Johansen

  55. THE RED ALGA GENUS RHODOSPORA (BANGIOPHYCIDAE, RHODOPHYTA): FIRST REPORT FROM NORTH AMERICA1

    Article • Journal of Phycology, November 2005, Wiley

    Professor Jeffrey R. Johansen

  56. Recognizing cyanobacterial diversity through adoption of a new species paradigm

    Article • Algological Studies, October 2005, Schweizerbart

    Professor Jeffrey R. Johansen

  57. Algal diversity in North American desert soils

    Article • August 2005, SPIE

    Professor Jeffrey R. Johansen

  58. Floristic Study of Highland Heights Community Park, Cuyahoga County, Ohio

    Article • Castanea, June 2005, Castanea

    Professor Jeffrey R. Johansen

  59. MOLECULAR AND MORPHOLOGICAL CHARACTERIZATION OF TEN POLAR AND NEAR-POLAR STRAINS WITHIN THE OSCILLATORIALES (CYANOBACTERIA)1

    Article • Journal of Phycology, March 2005, Wiley

    Professor Jeffrey R. Johansen

  60. 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

    Article • Algological Studies, February 2004, Schweizerbart

    Professor Jeffrey R. Johansen

  61. Biological Soil Crust and Vascular Plant Communities in a Sand Savanna of Northwestern Ohio

    Article • The Journal of the Torrey Botanical Society, October 2003, JSTOR

    Professor Deborah A Neher, Professor Jeffrey R. Johansen

  62. Photographic Atlas of the Microscopic Freshwater Cyanobacteria

    Article • Journal of Phycology, September 2003, Wiley

    Professor Jeffrey R. Johansen

  63. Development of immobilized cyanobacterial amendments for reclamation of microbiotic soil crusts

    Article • Algological Studies, August 2003, Schweizerbart

    Professor Jeffrey R. Johansen

  64. Cyprinid fishes as samplers of benthic diatom communities in freshwater streams of varying water quality

    Article • Canadian Journal of Fisheries and Aquatic Sciences, February 2003, Canadian Science Publishing

    Professor Jeffrey R. Johansen

  65. PHYLOGENY AND GENETIC VARIANCE IN TERRESTRIAL MICROCOLEUS (CYANOPHYCEAE) SPECIES BASED ON SEQUENCE ANALYSIS OF THE 16S rRNA GENE AND ASSOCIATED 16S-23S ITS REGION1

    Article • Journal of Phycology, December 2002, Wiley

    Professor Jeffrey R. Johansen

  66. Spirirestis rafaelensis gen. et sp. nov. (Cyanophyceae), a new cyanobacterial genus from arid soils

    Article • Nova Hedwigia, February 2002, Schweizerbart

    Professor Jeffrey R. Johansen

  67. FRESHWATER DIATOMS FROM CAROLINA BAYS AND OTHER ISOLATED WETLANDS ON THE ATLANTIC COASTAL PLAIN OF SOUTH CAROLINA, U.S.A., WITH DESCRIPTIONS OF SEVEN TAXA NEW TO SCIENCE

    Article • Diatom Research, May 2000, Taylor & Francis

    Professor Jeffrey R. Johansen

  68. Microalgae: Aspects of Diversity and Systematics

    Article • Phycologia, July 1998, International Phycological Society

    Professor Jeffrey R. Johansen

  69. MICROCOSTATUSGEN. NOV., A NEW AEROPHILIC DIATOM GENUS BASED ONNAVICULA KRASSKEIHUSTEDT

    Article • Diatom Research, May 1998, Taylor & Francis

    Professor Jeffrey R. Johansen

  70. Pelletized cyanobacterial soil amendments: Laboratory testing for survival, escapability, and Nitrogen fixation

    Article • Arid Land Research and Management, April 1998, Taylor & Francis

    Professor Jeffrey R. Johansen

  71. CRYPTOGAMIC CRUSTS OF SEMIARID AND ARID LANDS OF NORTH AMERICA

    Article • Journal of Phycology, April 1993, Wiley

    Professor Jeffrey R. Johansen

  72. Comparative anatomy of absorbing roots and anchoring roots in three species of Cyclanthaceae (Monocotyledoneae)

    Article • Canadian Journal of Botany, December 1992, Canadian Science Publishing

    Professor Jeffrey R. Johansen

  73. PHYSIOLOGICAL VARIABILITY WITHIN TEN STRAINS OF CHAETOCEROS MUELLERI (BACILLARIOPHYCEAE)1

    Article • Journal of Phycology, June 1990, Wiley

    Professor Jeffrey R. Johansen

  74. PHYSIOLOGICAL CHARACTERIZATION OF SIX LIPID-PRODUCING DIATOMS FROM THE SOUTHEASTERN UNITED STATES

    Article • Journal of Phycology, December 1988, Wiley

    Professor Jeffrey R. Johansen

  75. PHYSIOLOGICAL CHARACTERIZATION OF SIX LIPID-PRODUCING DIATOMS FROM THE SOUTHEASTERN UNITED STATES

    Article • Journal of Phycology, December 1988, Wiley

    Professor Jeffrey R. Johansen

  76. Changes in valve morphology ofThalassiosira decipiens(Bacillariophyceae) cultured in media of four different salinities

    Article • British Phycological Journal, December 1988, Taylor & Francis

    Professor Jeffrey R. Johansen

  77. Atlas du Phytoplancton Marin Volume II: Diatomophycees

    Article • Phycologia, September 1988, International Phycological Society

    Professor Jeffrey R. Johansen

  78. The morphology and ecology of Pleurochrysis carterae var. dentata var. nov. (Prymnesiophyceae), a new coccolithophorid from an inland saline pond in New Mexico, USA

    Article • Phycologia, March 1988, International Phycological Society

    Professor Jeffrey R. Johansen

  79. THE INLAND CHAETOCEROS (BACILLARIOPHYCEAE) SPECIES OF NORTH AMERICA

    Article • Journal of Phycology, December 1986, Wiley

    Professor Jeffrey R. Johansen

  80. A contribution to the taxonomy of Chaetoceros muelleri Lemmermann (Bacillariophyceae) and related taxa

    Article • Phycologia, December 1985, International Phycological Society

    Professor Jeffrey R. Johansen

  81. The Genus Thalassiosira (Bacillariophyceae): Morphology of Heterovalvate Resting Spores of T. scotia

    Article • American Journal of Botany, December 1985, Botanical Society of America

    Professor Jeffrey R. Johansen

  82. The genus Thalassiosira (Bacillariophyceae): studies on species occurring south of the Antarctic Convergence Zone

    Article • Phycologia, June 1985, International Phycological Society

    Professor Jeffrey R. Johansen

  83. Chaetoceros amanita Cleve-Euler (Bacillariophyceae) from Blue Lake Warm Spring, Utah, USA

    Article • Phycologia, March 1985, International Phycological Society

    Professor Jeffrey R. Johansen

  84. Recovery Patterns of Cryptogamic Soil Crusts in Desert Rangelands Following Fire Disturbance

    Article • The Bryologist, January 1984, JSTOR

    Professor Jeffrey R. Johansen

  85. Effects of Long-Term Grazing on Cryptogam Crust Cover in Navajo National Monument, Ariz

    Article • Journal of Range Management, September 1983, JSTOR

    Professor Jeffrey R. Johansen

  86. Effects of Burning on the Algal Communities of a High Desert Soil near Wallsburg, Utah

    Article • Journal of Range Management, September 1982, JSTOR

    Professor Jeffrey R. Johansen

  87. Diatoms of aerial habitats

    Article • Cambridge University Press

    Professor Jeffrey R. Johansen

  88. Diatoms of aerial habitats

    Article • Cambridge University Press

    Professor Jeffrey R. Johansen

  89. Rexia erecta gen. et sp. nov. and Capsosira lowei sp. nov., two newly described cyanobacterial taxa from the Great Smoky Mountains National Park (USA)

    Article • Springer Science + Business Media

    Professor Jeffrey R. Johansen

  90. Ecology and assessment of the benthic diatom communities of four Lake Erie estuaries using Lange-Bertalot tolerance values

    Article • Springer Science + Business Media

    Professor Jeffrey R. Johansen