Nancy Collins Johnson

Nancy Johnson 230px


BS in Biology, University of Minnesota, 1980
MS in Botany, University of Wisconsin, 1985 
PhD in Ecology, Evolution and Behavior, University of Minnesota, 1991


Office: Physical Sciences (bldg #19), room 124
Phone: 928-523-6473
Personal Web Site
Soil Ecology Lab

Research Interests

Nutritional symbioses among soil organisms fascinate me. I study arbuscular mycorrhizas, which are fungal symbioses with most terrestrial plants. Mycorrhizas in natural and agricultural systems are my primary research focus. A better understanding of the factors controlling the balance of trade between plants and mycorrhizal fungi could lead to their management so that fertilizer inputs can be reduced. Also, since mycorrhizal fungi are enormous (yet invisible), understanding how to manage them may help generate an important belowground carbon sink in our increasingly carbon dioxide enriched world.


Johnson NC, Angelard C, Sanders IR, Kiers TE. 2013. Predicting community and ecosystem outcomes of mycorrhizal responses to global change, invited review for a special issue in Ecology Letters, in press.

Ji B, Gehring CA, WilsonGWT, MillerRM, Flores-Rentería L, Johnson NC. 2013. Patterns of diversity and adaptation in Glomeromycota from three prairie grasslands. Molecular Ecology, in press.

Johnson N.C., Graham, J.H. 2013. The continuum concept remains a useful framework for studying mycorrhizal functioning. Plant & Soil, 363:411-419.

Liu Y., Shi G., Mao L., Cheng G., Jiang S., Ma X., An L., Du G., Johnson N.C., Feng H. 2012. Direct and indirect influences of eight years of nitrogen and phosphorus fertilization on Glomeromycota in an alpine meadow ecosystem. New Phytologist, 194:523-535.

Antoninka, A.,  Reich, P.B., Johnson N.C. 2011. Seven years of carbon dioxide enrichment, nitrogen fertilization and plant diversity influence arbuscular mycorrhizal fungi in a grassland ecosystem. New Phytologist 192:200-214.

Johnson N.C., Wilson G.W.T., Bowker M.A., Wilson J. and Miller R.M. 2010. Resource limitation is a driver of local adaptation in mycorrhizal symbioses. Proceedings National Academy of Science USA 107:2093-2098.

Johnson N.C., 2010. Tansley Review: Resource stoichiometry elucidates the structure and function of arbuscular mycorrhizas across scales. New Phytologist 185:631-647.

For a complete list of publications and additional information, please download NancyJohnson's CV.