Steven A. Nadler

Department of Nematology Chairperson
Professor & Nematologist
Office Phone: 530-752-2121
5th floor lab: 530-754-4321
4th floor lab: 530-754-5123
FAX: 530-752-5809
E-Mail: sanadler@ucdavis.edu

Biography

B.S., cum laude, Southwest Missouri State University, 1980-Biology.
M.S., Louisiana State University Medical Center, New Orleans, 1982-Medical Parasitology.
Ph.D., Louisiana State University Medical Center, New Orleans, 1985-Medical Parasitology.
NIH Postdoctoral Researcher, Experimental Parasitology Training Program, Center for Parasitology, University of Massachusetts, Amherst, 1985-1986.
NSF Postdoctoral Research Associate, Museum of Natural Science, Louisiana State University, Baton Rouge, 1986-1988.
Assistant/Associate Professor of Biological Sciences, Section of Ecology and Evolution, Department of Biological Sciences, Northern Illinois University, DeKalb, 1990-1996.
Associate Professor, Department of Nematology, University of California, Davis, 1996-2001.
Professor, Department of Nematology, University of California, Davis, 2001-present.

Lab Website

Prof. Nadler Laboratory Homepage

Teaching Disciplines

Introduction to Nematology; Biology of Parasitism; Molecular phylogenetic analysis

Research

Research in our laboratory focuses on using phylogenetic trees inferred from nucleotide sequence data as a framework to understand speciation, character evolution, host-symbiont cophylogeny, and molecular evolution. Many of our projects involve nematodes (both free-living and parasitic), although we continue to study other groups of vertebrate parasites, including acanthocephalans. Our main project is a collaborative National Science Foundation Tree-of-Life grant on nematode phylogeny with the laboratories of Jim Baldwin (UC Riverside), Paul De Ley (UC Riverside), David Fitch (New York University) and Kelley Thomas (University of New Hampshire). In addition, we have a collaborative NSF project with Ramon Carreno (Ohio Wesleyan University) to infer the evolutionary history of the Metastrongyloidea (nematode lungworms), with the goal of understanding the evolution of site specificity and life histories in these parasites. Finally, along with our collaborators, Jim Baldwin and I continue to publish and synthesize data generated during the course of our NSF PEET project on the nematode suborder Cephalobina, a group that includes certain free-living soil nematodes, and a relatively large number of parasitic taxa hosted by plants, invertebrates, and some vertebrates.

Selected Publications:

Baldwin, J.G., S.A. Nadler, and D.W. Freckman. 1999. Nematodes - pervading the earth and linking all life. In Proceedings of the second national forum on biodiversity, Nature and Human Society: The Quest for a Sustainable World, P. H. Raven and T. Williams (eds.) National Academy Press, pp. 176-191.

Balasuriya, U.B.R., J.F. Hedges, S.A. Nadler, W.H. McCollum, P.J. Timoney, and N.J. MacLachlan. 1999. Genetic stability of equine arteritis virus during horizontal and vertical transmission in an outbreak of equine viral arteritis. Journal of General Virology, 80:1949-1958.

De Ley, P., M.-A. Felix, L.M. Frisse, S.A. Nadler, P.W. Sternberg, and W.K. Thomas. 1999. Molecular and morphological characterization of two reproductively isolated species with mirror-image anatomy (Nematoda: Cephalobidae). Nematology, 1:591-612.

Nadler, S.A. 1999. Nucleotide sequences from vintage helminths: Fine wine or vinegar? A response to Herniou et al. (Letter). Parasitology Today, 15:122.

DeLey, I.T., P. De Ley, J.G. Baldwin, M. Mundo-Ocampo, and S.A. Nadler. 1999. Three new species of Nothacrobeles (Nematoda: Cephalobidae) from the Mojave Desert, California. Journal of Nematology, 31:482-497.

Crosbie, P.R., S.A. Nadler, E.G. Platzer, C. Kerner, J. Mariaux, and W.M. Boyce. 2000. Molecular systematics of Mesocestoides spp. (Cestoda: Mesocestoididae) from domestic and wild canids. Journal of Parasitology, 86:350-357.

Nadler, S.A., and D.S.S. Hudspeth. 2000. Phylogeny of the Ascaridoidea (Nematoda: Ascaridida) based on three genes and morphology: Hypotheses of structural and sequence evolution. Journal of Parasitology, 86:380-393.

Hudspeth, D.S.S., S.A. Nadler, and M.E.S. Hudspeth. 2000. A COX2 molecular phylogeny of the Peronosporomycetes. Mycologia, 92:674-684.

Nadler, S.A., E.P. Hoberg, D.S.S. Hudspeth, and L.G. Rickard. 2000. Relationships of Nematodirus species and Nematodirus battus isolates (Nematoda: Trichostrongyloidea) based on nuclear ribosomal DNA sequences. Journal of Parasitology, 86:588-601.

Felix, M.-A., P. De Ley, R.J. Sommer, L. Frisse, S.A. Nadler, K. Thomas, J. Vanfleteren, and P. Sternberg. 2000. Evolution of vulva development in the Cephalobina (Nematoda). Developmental Biology, 221:68-86.

Nadler, S. A., S. D'Amelio, H.-P. Fagerholm, B. Berland, and L. Paggi. 2000. Phylogenetic relationships among species of Contracaecum Railliet & Henry, 1912 and Phocascaris Host, 1932 (Nematoda: Ascaridoidea) based on nuclear rDNA sequence data. Parasitology, 121:455-463.

Nadler, S. A., B. J. Adams, E. T. Lyons, R. L. DeLong, and S. R. Melin. 2000. Molecular and morphometric evidence for separate species of Uncinaria (Nematoda: Ancylostomatidae) in California sea lions and northern fur seals: Hypothesis testing supplants verification. Journal of Parasitology, 86:1099-1106.

Gresoviac, S. J., J. S. Khattra, S. A. Nadler, M. L. Kent, R. H. Devlin, C. P. Vivares, E. De La Fuente, and R. P. Hedrick. 2000. Comparison of small subunit ribosomal RNA gene and internal transcribed spacer region sequences among isolates of the intranuclear microsporidian Nucleospora salmonis. Journal of Eukaryotic Microbiology, 47:379-387.

Stock, S. P., J. F. Campbell, and S. A. Nadler. 2001. Phylogeny of Steinernema Travassos, 1927 (Cephalobina: Steinernematidae) inferred from ribosomal DNA sequences and morphological characters. Journal of Parasitology, 87:877-889.

Baldwin, J. G., I. T. De Ley, M. Mundo-Ocampo, P. De Ley, S. A. Nadler, and M. Gebre. 2001. Acromoldavicus mojavicus n. sp. (Nematoda: Cephalobidae) from the Mojave Desert, California. Nematology, 3:343-353.

Stock, S. P., P. De Ley, I. De Ley, M. Mundo-Ocampo, J. G. Baldwin, and S. A. Nadler. 2002. Panagrobelus stammeri Ruhm, 1956 and Plectonchus hunti n. sp.: implications of new morphological observations for characterization of these genera (Nematoda: Panagrolaimoidea). Nematology, 4:403-419.

Nadler, S. A. 2002. Species delimitation and nematode biodiversity: phylogenies rule. Nematology, 4(5): 615-625.

Campbell, J. F., E. E. Lewis, S. P. Stock, S. A. Nadler, and H. K. Kaya. 2003. Evolution of host search strategies in entomopathogenic nematodes. Journal of Nematology 35:142-145.

Nadler, S. A., R. A. Carreno, B. J. Adams, H. Kinde, J. G. Baldwin, and M. Mundo-Ocampo. 2003. Molecular phylogenetics and diagnosis of soil and clinical isolates of Halicephalobus gingivalis (Nematoda: Cephalobina: Panagrolaimoidea), an opportunistic pathogen of horses. International Journal for Parasitology 33:1115-1125.

Carreno, R. A., and S. A. Nadler. 2003. Phylogenetic analysis of the Metastrongyloidea (Nematoda: Strongylida) inferred from ribosomal RNA gene sequences. Journal of Parasitology 89:965-973.