‌David Janos


View CV
166A Cox Science Center
1301 Memorial Drive, Coral Gables, FL 33124
E-mail: davidjanos@miami.edu
Office: (305) 284-6300
Fax: (305) 284-3039


  • University of Tasmania, Visiting Scholar, 2011
  • CRC for Tropical Savannas, Visiting Scientist, 1997
  • Harvard University, Bullard Fellow, 1994-1995
  • Smithsonian Tropical Research Institute, Postdoctoral Work, 1976-1979
  • Ph.D., University of Michigan, 1975
  • M.S., University of Michigan, 1971
  • B.S., Carleton College, 1969


  • Howard Hughes Medical Institute (to M. S. Gaines, P.I., and D. P. Janos, Co-P.I.):  “Undergraduate Science Education.” 2010-2014
  • National Institute of General Medical Sciences (M. S. Gaines, P.I., and D. P. Janos, Co-P.I.):  “Miami Dade College – University of Miami Bridge Program, American Reinvestment and Recovery Act Administrative Supplement.” 2009-2011
  • National Institute of General Medical Sciences (M. S. Gaines, P.I., and D. P. Janos, Co-P.I.):  “Miami Dade College – University of Miami Bridge Program.” 2008-2013
  • Howard Hughes Medical Institute (to M. S. Gaines, P.I., and D. P. Janos, Co-P.I.):  “Undergraduate Science Education.” 2006-2010
  • National Institute of General Medical Sciences, MBRS Initiative for more student diversity (IMSD) (to M. S. Gaines, P.I., with R. Bookman, and D. P. Janos, Co-P.Is.):  “IMSD Program at the University of Miami.” 2005-2009
  • National Institute of General Medical Sciences (M.S. Gaines with D.P. Janos): "Initiative for minority students: bridges to the baccalaureate." 2005-2008
  • National Science Foundation (to L. Sternberg, P.I., with M. Gaines, G. Goldstein, D. Janos, and F. Miralles-Wilhelm, Co-P.Is.):  “Acquisition of two isotope ratio mass spectrometers.” 2004-2005
  • National Science Foundation, Integrative Plant Biology (to D. P. Janos, P.I.):  “Plant iron nutrition in calcareous soils: are arbuscular mycorrhizas a help or a hindrance?” 2003-2006
  • Howard Hughes Medical Institute (to M. S. Gaines, P.I., with D. P. Janos, Co-P.I.):  “Undergraduate Biological Sciences Education Program.” 2002-2006 


  • Evolutionary Biology
  • Tropical Biology
  • Conservation and Restoration Biology


My research concerns the evolutionary and physiological ecology of root symbioses, especially mycorrhizas. These fungus-root mutualisms are pervasive among plants in natural ecosystems, and especially in the notoriously mineral nutrient-poor soils of the tropics, are indispensable for mineral nutrient uptake by a majority of plant species. Mycorrhizas can be important for successful restoration of degraded tropical lands, and might have promise for low-input, sustainable agriculture. My work takes two major foci: 1) factors influencing whether or not mycorrhizas form, and 2) once appropriate mycorrhizas do form, what are the consequences for host survival and growth. Within these foci, my research and publications have spanned alpha taxonomy of glomeromycotan fungi to rodent dispersal of those fungi, and defining dependence and responsiveness of plants to mycorrhizas through consequences of those attributes for plant succession, competition, community composition, and biodiversity. Most recently, I have been investigating glomalin, a glycoprotein produced in abundance by glomeromycotan fungi, and consequences of both arbuscular and ectomycorrhizas for establishment of eucalypts in Australian forests.


I am most interested in fostering students' experiential learning (i.e., "learning by doing"). I incorporate this philosophy in most of my courses, but especially in: "Howard Hughes Medical Institute (HHMI)/PRISM Introductory Biology Laboratory" (BIL 162), "Core Laboratory Techniques" (BIL 258), and "Galapagos Ecology and Land Use" (BIL/ECS 332). In the HHMI laboratory, students are provided an opportunity to conduct research instead of pursuing prescribed, "cookbook" exercises. That opportunity to understand research conceptually is complemented by Core Laboratory Techniques in which students get hands-on experience with modern analytical instruments for element analysis. Galapagos Ecology and Land Use (part of the UGalapagos fall semester abroad program) focuses on making qualitative and quantitative field observations that can be understood in light of fundamental ecological principles. Additionally, together with Kathryn Tosney, I teach a graduate core course, "Professional Skills" (BIL 612), that engages students in all the activities of which academic scientists require mastery.


  • Weremijewicz, J. and D.P. Janos. 2013. Common mycorrhizal networks amplify size inequality in Andropogon gerardii monocultures. New Phytologist, 198: 203-213.
  • Janos, D.P., Scott J, Aristizábal C, Bowman DMJS. 2013. Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms. PLoS ONE 8(2): e57716. doi:10.1371/journal.pone.0057716
  • Sawers, R.J.H., Gebreselassie, M.N., Janos, D.P., and U. Paszkowski.  2010.  Characterizing variation in mycorrhiza effect among diverse plant varieties.  Theoretical and Applied Genetics 120:1029-1039.  DOI: 10.1007/s00122-009-1231-y
  • Schroeder-Moreno, M. S., and D. P. Janos.  2008.  Intra- and interspecific density affects plant growth responses to arbuscular mycorrhizas.  Botany86:1180-1193.  DOI: 10.1139/B08-080
  • Janos, D. P., J. Scott, D. M. J. S. Bowman.  2008.  Temporal and spatial variation of fine roots in a northern Australian Eucalyptus tetrodontasavanna.  Journal of Tropical Ecology 24:177-188.  DOI: 10.1017/S0266467408004860
  • Janos, D. P., S. Garamszegi, and B. Beltran.  2008.  Glomalin extraction and measurement.  Soil Biology and Biochemistry 40:728-739.  DOI: 10.1016/j.soilbio.2007.10.007