Dr. Clifford A. Ochs

                                                                    Here I am with my class - Aquatic Microbiology
                                                                    (We've been in the lake sampling methanogens)

Address:     Department of Biology                Phone:   662-915-7562
                  University of Mississippi              FAX:      662-915-5144
                  University, MS  38677                  e-mail:   byochs@olemiss.edu

Population dynamics and ecological interactions of aquatic microorganisms.
Effects of the light and chemical environment on aquatic microbial community structure and function.
Nutrient biogeochemistry in aquatic and terrestrial ecosystems.

Our lab is engaged in various studies in the areas of aquatic ecology and biogeochemistry.  Broadly speaking, we are investigating connections between the abiotic environment, plankton community composition and activities, and biogeochemical cycles involving nitrogen, phosphorus, and carbon.  Our research is focused mostly on aquatic habitats of northern Mississippi including oxbow lakes, various wetland types, reservoirs, the Mississippi River itself, and even flooded agricultural fields in the Mississippi Delta.  Funding to support our work comes primarily from the National Science Foundation, the Environmental Protection Agency, and the Department of Agriculture. 

For a recent presentation describing our research activities click HERE

     Aquatic Microbiology (BISC 505)
     Microbial Ecology (BISC 522)
     Research Methods in Biology (BISC 300)
     Freshman Biology (BISC 102, 104)  

Canion, A.K. and C. Ochs. 2005. The population dynamics of freshwater armored dinoflagellates in a small lake in Mississippi. J. Freshwater Ecology 20: 617-626.

Hwang, H-M, N. McArthur, C. Ochs, and B. Libman. 2004. Assessing interactions of multiple agrichemicals by using bacterial assemblages in a wetland mesocosm system. Int. J. Environ. Res. Public Health 2: 84-90.

Ochs, C.A. and S.A. Milburn. 2003. Effects of wintertime flooding to control erosion on selected chemical and microbial properties of agricultural soils in the Mississippi Delta. J. Mississippi Academy of Sciences 48: 102-114.           

Ochs, C.A. 2002. Planktonic microorganisms: bacterioplankton, p. 2519-2539. In G. Bitton [ed.], Encyclopedia of Environmental Microbiology, John Wiley, N.Y.

Pezeshki, S.R., R.D. DeLaune, W.J. Catallo, J.A. Nyman, C.A. Ochs, S.A. Milburn,  J.M. Melack, L. Mertes, L. Hess, and B. Forsberg. 2003. Wetland biogeochemistry, p. 125-156 In: M. Holland and L. Shaffer, Proceedings from the Center for Water and Wetlands Research Conference, Oxford, MS., Island Press.

Rhew, K., and C.A. Ochs. 2000. Spatial patterns in autotrophic picoplankton abundance in a reservoir examined using microcosm experiments. Internat. Rev. Hydrobiol. 85 (4): 395-412 .

Rhew, K., R.M. Baca, C.A. Ochs, and S.T. Threlkeld. 1999. Interaction effects of fish, nutrients, mixing and sediments on autotrophic picoplankton and algal composition. Freshwater Biology. 42:99-109.

Ochs, C.A. and L. Eddy  1998. Effects of UVA on grazing pressure of a marine heterotrophic nanoflagellate on the unicellular cyanobacterium Synechococcus spp..  Appl. Environ. Microbiol. 64: 287-293.

Ochs, C.A. and K. Rhew.  1997.  Population dynamics of autotrophic picoplankton in a southeastern U.S. reservoir. Internationale Revue der gesamten Hydrobiologie 82: 293-313.

Ochs, C.A.  1997. Effects of UV radiation on feeding by two marine heterotrophic nanoflagellates on autotrophic picoplankton. Journal of Plankton Research 19(10): 1517-  1536.

Hwang, H-M, N. McArthur, C. Ochs, and K. Overstreet, Jr. 1997.  Assessing interactions of multiple agrichemicals by using bacterial assemblages in a wetland mesocosm system.  Proceedings of the twenty-seventh Mississippi Water Resources Conference.

Ochs, C.A. J.J. Cole, and G.E. Likens.  1995. Population dynamics of bacterioplankton in an  oligotrophic lake. Journal of Plankton Research 17(2): 365-391.

Cole, J.J., N. Caraco, D. Strayer, C.A. Ochs, and S. Nolan. 1989. A detailed organic carbon  budget as an ecosystem-level calibration of bacterial respiration in an oligotrophic lake  during mid-summer. Limnol. Oceanogr. 34(2): 286-296.

Melack, J.M., J.L. Stoddard, and C.A. Ochs. 1985. Major ion chemistry and sensitivity to acid precipitation of Sierra Nevada lakes. Water Resour. Res. 21: 27-32.

Lab manuals
Ochs, C.A. 1998. Inquiry into Life: Human Biology. Hayden-McNeil Publishing, Inc., 168 pp.

Stratton, G.E., and C.A. Ochs. 2000. Inquiry into Life: Diversity and the Environment. Hayden-McNeil Publishing, Inc., 184 pp.

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