TAMMI RICHARDSON

Tammi Richardson

Assistant Professor of Marine Science and Biological Sciences
Ph.D., 1996, Dalhousie University (Canada)
Rm 612 EWS
803-777-2269
richardson@biol.sc.edu

Phytoplankton Physiology and Ecology; Marine Food Webs

My research focuses on physiological responses of phytoplankton to fluctuations in environmental factors like light, nutrients, and temperature and how, ultimately, variations in small-scale processes translate into larger scale effects on ecosystems. I am specifically interested in phytoplankton growth rates, including the underlying processes of photosynthesis and nutrient uptake and incorporation. I examine how changes in growth rate may result in changes in phytoplankton community composition, including the development of phytoplankton blooms (including harmful algal blooms) and how these influence aquatic food webs. For my research, I use a variety of tools, including algal cultures, small volume microcosms, field studies and numerical modelling.

Selected Publications:

See, J.H., L. Campbell, T.L. Richardson, J.L. Pinckney and R. Shen. 2005. Combining new technologies for determination of phytoplankton community structure in the northern Gulf of Mexico. Journal of Phycology, in press.

Breed, G., G.A. Jackson, and T.L. Richardson. 2004. Sedimentation, carbon export, and food web structure in the Mississippi River plume described by inverse analysis Marine Ecology Progress Series 278: 35-51.

Richardson, T.L. and J.L. Pinckney. 2004. Monitoring of the toxic dinoflagellate, Karenia brevis (Dinophyta), using gyroxanthin-based detection methods. Journal of Applied Phycology, accepted 12 May 2004, in press.

Richardson, T.L., G.A. Jackson, H.W. Ducklow, and M.R. Roman. 2004. Planktonic food webs of the equatorial Pacific at 0°, 140° W: a synthesis of EqPac time-series carbon flux data. Deep-Sea Research I 51(9): 1245-1274.

Richardson, T.L., G.A. Jackson, and A.B. Burd. 2003. Planktonic food web dynamics in two contrasting regions of Florida Bay, US. Bulletin of Marine Science 73(3): 569-591.

Bergmann, T, T.L. Richardson, H.W. Paerl, J.L. Pinckney, and O. Schofield. 2002. Synergy of light and nutrients on the photosynthetic efficiency of phytoplankton populations from the Neuse River Estuary, North Carolina. Journal of Plankton Research 24(9): 923-933.

Richardson, T.L., J.L. Pinckney, and H.W. Paerl. 2001. Responses of estuarine phytoplankton communities to nitrogen form and mixing using microcosm bioassays. Estuaries 24 (6A): 828-839.

Pinckney, J.L., H.W. Paerl, P.A. Tester, and T.L. Richardson. 2001. The role of nutrient loading and eutrophication in estuarine ecology. Environmental Health Perspectives 109: 699-706.

Pinckney, J.L., T.L. Richardson, D.F. Millie and H.W. Paerl. 2001. Application of photopigment biomarkers for quantifying microalgal community composition and in situ growth rates. Organic Geochemistry 32: 585-595.

Paerl, H.W., J.D. Bales, L.W.Ausley, C.P. Buzzelli, L.B. Crowder, L.A. Eby, J. Fear, M. Go, B. Peierls, T.L. Richardson, and J.S. Ramus. 2001. Ecosystem impacts of 3 sequential hurricanes (Dennis, Floyd and Irene) on the US’s largest lagoonal estuary, Pamlico Sound, NC. Proceedings of the National Academy of Sciences 98(10): 5655-5660.

Richardson, T.L., C.E. Gibson, and S.I. Heaney. 2000. Temperature, growth and seasonal succession of phytoplankton from Lake Baikal, Siberia. Freshwater Biol. 44(3): 431-440.

Paerl, H.W., J.D. Bales, L.W.Ausley, C.P. Buzzelli, L.B. Crowder, L.A. Eby, M. Go, B. Peierls, T.L. Richardson, and J.S. Ramus. 2000. Recent hurricanes result in continuing ecosystem impacts on the USA's largest lagoonal estuary, Pamlico Sound, N.C. Eos 81(40): 458.

Richardson, T.L., J.J. Cullen, D.E. Kelley, and M.R. Lewis. 1998. Potential contributions of vertically migrating Rhizosolenia to nutrient cycling and new production in the open ocean. J. Plankton Research 20 (2): 219-241.

Richardson, T.L., A.M. Ciotti, J.J. Cullen, and T.A. Villareal. 1996. Physiological and optical properties of Rhizosolenia formosa (Bacillariophyceae) in the context of open ocean vertical migration. J. Phycol. 32: 741-757.

Richardson, T.L. and J.J. Cullen. 1995. Changes in buoyancy and chemical composition during growth of a coastal marine diatom: ecological and biogeochemical consequences. Mar. Ecol.Prog. Ser. 128: 77-90.

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