Robert A. Johnson
Dr. Johnson has broad research interests in the evolutionary ecology of North American seed-harvester ants. Dr. Johnson’s research focuses on life history, nest founding strategies, biogeography, community structure, and hybridization and caste determination, primarily using the seed-harvester ant genus Pogonomyrmex. Dr. Johnson’s interests also include the ant fauna of Baja California, Mexico, and adjacent areas of mainland Mexico. Brief descriptions of several larger ongoing projects follow.
Johnson, R.A. 1995. Distribution and natural history of the workerless inquiline ant Pogonomyrmex anergismus Cole. Psyche 101 (1994): 257-262. [1995.]
Johnson, R.A., Holbrook, C.T., Strehl, C. & Gadeau, J. 2007. Population and colony structure and morphometrics in the queen dimorphic harvester ant, Pogonomyrmex pima. Insectes Sociaux 54: 77-86.
Johnson, R.A. & Overson, R.P. 2009. A new North American species of Pogonomyrmex from the Mohave Desert of Eastern California and Western Nevada. Journal of Hymenoptera Research 18: 305-314.
Johnson, R.A., Parker, J.D. & Rissing, S.W. 1996. Rediscovery of the workerless inquiline ant Pogonomyrmex colei and additional notes on natural history. Insectes Sociaux 43: 69-76. [(31.xii).1996.]