Introduction:
Professor in the Department of Biology at Saint Mary's College, Notre Dame, IN 46556. My usual teaching assignments include Field Botany (Biology 324), Economic Botany (Biology 313), Ecology (Biology 323), Statistical Methods for Biologists (Biology 315), and Biology and Human Values II (Biology 104). In addition to these formal courses, I have also directed 2-5 senior research projects each year at Saint Mary's.
My research interests focus on plant taxonomy and systematics, especially of the red and black oaks (Quercus section Lobatae) native to North America. I use numerical taxonomic and morphometric methods to examine problems dealing with morphological variation within and among populations and species and to investigate evidence of hybridization among oak species.
Educational History:
Ph.D., Botany, Miami University, 1975
M.S., Biology, Austin Peay State University, 1972
B.S., Biology, Austin Peay State University, 1970
Professional History:
Professor, Department of Biology, Saint Mary's College, 1979-Present
Guest Professor, Department of Biological Sciences, University of Notre Dame, 1981-Present
Director, Greene-Nieuwland Herbarium, University of Notre Dame,1988-Present
Assistant Professor, Department of Biological Sciences, Wright State University, 1975-79
Professional Memberships:
American Society of Plant Taxonomists
International Association for Plant Taxonomy
Society of Systematic Biologists
Selected Publications:
Jensen, R. J. and W. H. Eshbaugh. 1976. Numerical taxonomic studies of hybridization in Quercus. I. Populations of restricted areal distribution and low taxonomic diversity. Syst. Bot. 1: 1-9.
Jensen, R. J. and W. H. Eshbaugh. 1976. Numerical taxonomic studies of hybridization in Quercus. II. Populations with wide areal distributions and high taxonomic diversity. Syst. Bot. 1: 10-19.
Jensen, R. J., M. J. McLeod, W. H. Eshbaugh, and S. I. Guttman. 1979. Numerical taxonomic analyses of allozymic variation in Capsicum (Solanaceae). Taxon 28: 315-327.
Knops, J. F. and R. J. Jensen. 1980. Morphological and phenolic variation in a three species community of red oaks. Bull. Torrey. Bot. Club 107: 418-428.
Jensen, R. J. and C. D. Barbour. 1981. A phylogenetic reconstruction of the Mexican cyprinid fish genus Algansea. Syst. Zool. 30: 41-57.
Jensen, R. J. 1981. Wagner networks and Wagner trees: a presentation of methods for estimating most parsimonious solutions. Taxon 30: 576-590.
Jensen, R. J. and J. F. Hancock. 1982. Multivariate relationships among California strawberries. Bull. Torrey Bot. Club 109: 136-147.
Jensen, R. J. 1986. Geographic spatial autocorrelation in Quercus ellipsoidalis. Bull. Torrey. Bot. Club 113: 431-439.
Jensen, R. J. 1989. The Quercus falcata Michx. complex in Land Between The Lakes, Kentucky and Tennessee: a study of morphological variation. Amer. Midl. Nat. 121: 245-255.
Jensen, R. J. 1990. Detecting shape variation in oak leaf morphology: a comparison of rotational-fit methods. Amer. J. Bot. 77: 1279-1293.
Jensen, R. J. 1992. Morphometric variation in acorns from two red oak communities in Land Between The Lakes: hybridization or normal variation? pages 87-101. IN: Snyder, D. H. (ed.) Proceedings of the contributed paper sessions of the fourth annual symposium on the natural history of lower Tennessee and Cumberland river valleys. Center for Field Biology, Austin Peay State University, Clarksville,Tennessee.
Jensen, R. J. 1992. Acorn size redux. Journ. Biogeography 19: 573-579.
Hokanson, S. C., J. G. Isebrands, R. J. Jensen, and J. F. Hancock. 1993. Isozyme variation in oaks of the Apostle Islands in Wisconsin: genetic structure and levels of inbreeding in Quercus rubra and Q. ellipsoidalis (Fagaceae). Amer. J. Bot. 80: 1349-1357.
Jensen, R. J., S. C. Hokanson, J. G. Isebrands, and J. F. Hancock. 1993. Morphometric variation in oaks of the Apostle Islands in Wisconsin: evidence of hybridization between Quercus rubra and Q. ellipsoidalis (Fagaceae). Amer. J. Bot. 80: 1358-1366.
Chester, E. W., R. J. Jensen, and L. J. Schibig. 1995. Forest communities of Montgomery and Stewart Counties, northwestern Middle Tennessee. Jour. Tenn. Acad. Sci. 70: 82-91.
Jensen, R. J. 1997. Quercus Linnaeus sect. Lobatae Loudon, the red or black oaks. IN: Flora of North America, vol. 3. pp. 447-468.
Stuessy, T.F., D.J. Crawford, G.J Anderson and R.J. Jensen. 1998. Systematics, biogeography and conservation of Lactoridaceae. Perspectives in Plant Ecology, Evolution and Systematics 1/2: 267-290.
Tomlinson, P.T., R.J. Jensen and J.F. Hancock. 2000. Do whole tree silvic characters indicate hybrization in red oak (Quercus section Lobatae)? Amer. Midl. Nat. 143: 154-168.
Crawford, D. J., E. Ruiz, T. F. Stuessy, E. Tepe, P. Aqeveque, F. Gonzalez, R. J. Jensen, G. J. Anderson, G. Bernardello, M. Baeza, U. Swenson and M. Silva O. 2001. Allozyme diversity in endemic flowering plant species of the Juan Fernandez Archipelago, Chile: ecological and historical factors with implications for conservation. American Journal of Botany 88: 2195-2203.
Platt, T. R. and R. J. Jensen. 2002. Aptorchis aequalis Nicoll, 1914 (Digenea: Plagiorchiidae) is a senior synonym of Dingularis anfracticirrus Jue Sue & Platt, 1999 (Digenea: Plagiorchiidae). Systematic Parasitology 52: 183-191.
Crawford, D., M. Tago-Nakazawa, T. F. Stuessy, G. J. Anderson, G. Bernardello, E. Ruiz, R. J. Jensen, C. M. Baeza, A. D. Wolfe, and M. Silva O. 2001. Intersimple sequence repeat (ISSR) variation in Lactoris fernandeziana (Lactoridaceae), a rare endemic of the Juan Fernandez archipelago, Chile. Plant Species Biology 16: 185-192.
Jensen, R. J., M. Schowyer, D. J. Crawford, T. F. Stuessy, G. J. Anderson, C. M. Baeza, M. Silva O., and E. Ruiz. 2002. Patterns of morphological and genetic variation among populations of Myrceugenia fernandeziana (Myrtaceae) on Masatierra Island: implications for conservation. Systematic Botany 27: 534-547.
Jensen, R. J., K. M. Ciofani, and L. C. Miramontes. 2002. Lines, outlines, and landmarks: morphometric analyses of leaves of Acer rubrum, Acer saccharinum (Aceraceae) and their hybrid.Taxon 51: 475-492.
Butcko, V., and R. J. Jensen. 2002. Evidence of tissue-specific allelopathic activity in Euthamia graminifolia and Solidago canadensis (Asteraceae). Am. Midl. Nat. 148: 253-262.
Jensen, R. J. 2006. On delimiting species for taxonomic analyses. Systematic Botany 31: 432-435.
Reviews:
Jensen, R. J. and H. W. Keller. 1979. Review of: Major Medicinal Plants: Botany, Culture, and Uses, by J. F. Morton. McIlvainea 3: 58-59.
Jensen, R. J. 1983. Review of: An Introduction to Mathematical Taxonomy, by G. Dunn and B. S. Everitt. Syst. Bot. 8: 103-104.
Jensen, R. J. 1986. Review of: Taxonomic Analysis in Biology, by L. A. Abbott, F. A. Bisby, and D. J. Rogers. Syst. Bot. 11: 492.
Jensen, R. J. 1989. Review of: The Lysenko Affair, by D. Joravsky. Bios 58: 102-104.
Jensen, R. J. 1989. Review of: NTSYS-PC, by F. J. Rohlf. Quart. Rev. Biol. 64: 250-252.
Jensen, R. J. 1989. Review of: PC-Taxon, a taxonomic database, by Fred Rhoades. Quart. Rev. Biol. 64: 377- 378.
Jensen, R. J. 1990. Review of: PANKEY, by R. Pankhurst. Quart. Rev. Biol. 65: 538-539.
Jensen, R. J. 1991. Review of: Plant Taxonomy, by T. F. Stuessy. Bios 61: 39-41.
Jensen, R. J. 1995. Review of: Multi-Variate Statistical Package, version 2.1, by W. L. Kovach. Quart. Rev. Biol. 70: 267-268.
Lauder, G. V., R. B. Huey, R. K. Monson, and R. J. Jensen. 1995. Systematics and the study of organismal form and function. BioScience 45: 696-704.
Jensen, R. J. 2002. "The Oaks of Land Between The Lakes: Biodiversity and Hybridization." Pages 323-334 in Land Between The Lakes, Kentucky and Tennessee, E. W. Chester and J. S. Fralish (eds.). Miscellaneous Publication Number 16 of the Center for Field Biology, Austin Peay State University, Clarksville, TN.
Papers Presented at Meetings (past five years):
Acorns and oak species. American Society of Plant Taxonomists Annual Meeting, August 2002. WITH: Patricia Tomlinson.
Leaves, acorns, and character variability in Quercus (Fagaceae). American Society of Plant Taxonomists Annual Meeting, July 2003. WITH: Patricia Tomlinson.
Genetic diversity and reproductive biology of the flowering plants of the Juan Fernandez Islands, Chile. American Society of Plant Taxonomists Annual Meeting, August 2005. WITH: Dan Crawford, Tod Stuessy, Greg Anderson, Gabriel Bernardello, Eduardo Ruiz, Carlos M. Baeza and Mario Silva O.
The Phenetic Revolution: A Natural Consequence?. American Society of Plant Taxonomists Annual Meeting, July 2007.
Professional Activities/Awards:
Recipient of the Wright State University College of Science and Engineering Award for Outstanding Teaching, 1978.
Elected a Fellow of the Indiana Academy of Science,1986.
Senior Research Fellow, The Center for Field Biology of Land Between The Lakes, Austin Peay State University, 1986-88.
Visiting Scholar, Miami University Department of Botany Academic Challenge Program, 1987.
Recipient of the American Society of Plant Taxonomists Distinguished Service Award, 1996.
Recipient of the Saint Mary's College Maria Pieta Award for Outstanding Teaching, 1997.
Recipient of International Oak Society Special Service Award, 2006
Treasurer of the American Society of Plant Taxonomists (ASPT), 1991-1996. Served on the ASPT Research Committee from 1987-1990, chairing the committee in 1989 and 1990. Served on the ad hoc committee to revise the ASPT Bylaws, 1992-1993. Associate Editor, Systematic Botany, 1996-2000. Elected ASPT Council Member 2001; Served on the ASPT Honors and Awards Committee 2001-2002 (Chair, 2002); Elected ASPT President-Elect, 2003
Board of Directors of the International Oak Society, 1997 - present. Serving as Membership Chair and Webmaster for IOS.
Co-Chair of the Committee on Quantitative and Evolutionary Morphology of the Systematics Agenda 2000 project sponsored by the American Society of Plant Taxonomists, the Society for Systematic Zoology, and the Willi Hennig Society.
Associate Editor for Systematic Botany, American Midland Naturalist, 1988-2005. Executive Committee of the same journal, 1990-present.
Editorial Advisory Board of Plant Systematics and Evolution 1990-1996.
Chair of Plant Systematics and Biodiversity section of the Indiana Academy of Science, 1980-81, 1997-98. Co-Chair of the Program Committee for the 1988 meetings of the Indiana Academy of Science. Served as a member of the IAS Publications Committee from 1988-1993 and the Fellows Committee from 1986-93. Served as a member of the Biological Survey Committee, 1986-97.
Co-Host, 16th International Numerical Taxonomy Conference (held at the University of Notre Dame). Organized and Chaired symposium "Problems in Multivariate Analysis."
Program Chair, 24th International Numerical Taxonomy Conference (held as part of ICSEB IV, at the University of Maryland) and 25th International Numerical Taxonomy Conference (held at the University of Pittsburgh).
Organized a panel session, "Quantitative and Evolutionary Morphology," for the 26th International Numerical Taxonomy Conference (held at McGill University, Montreal, Canada).
Panelist, National Science Foundation Systematic Biology program, 1983-85, 1986-87.
