K. David Hambright
Professor of Biology

Phone: (405)325-7435
Fax: (405)325-7440

RM/Lab:SH304/UOBS & PHSC 219H, L, & M.

Dr. Hambright's web page

K. David HambrightCurrent Research Interests and Subject Areas Available for Graduate Research

Ecological interactions between freshwater consumer and prey species are the primary foci of my lab group, the Plankton Ecology and Limnology Laboratory (PEL Lab). Our studies have covered a broad range of aquatic organisms, from bacteria to fish, with emphases on lake and reservoir ecosystems. We are particularly interested in understanding how consumers affect community and ecosystem level dynamics through direct and indirect effects on planktonic microbial assemblages via mechanisms such as selective consumption, alteration of competitive forces, and changes in nutrient cycling dynamics. Laboratory and field experimentation play key roles in PEL Lab research, and we typically employ multiple but separate approaches to both basic and applied questions. Graduate and undergraduate students working in the PEL lab are free to explore any topic in aquatic ecology and evolutionary biology. Current student research includes the investigation of factors that affect distributional patterns of the harmful algal bloom (HAB) species Prymnesium parvum across the regional landscape using qPCR and biogeochemical surveys; experimental analyses of acute and chronic impacts of HAB toxins on fish and zooplankton; analytical and toxicological characterization of HAB toxins; analysis of the effects of environmental variation, including HABs, on population dynamics, abundances, and reproductive strategies of monogonont rotifers; the study and metagenomic documentation of microbial diversity across environmental gradients; study of the ecology of invasive Zebra mussels and potential their interactions with the invasive Harris mud crab in Lake Texoma; genomic sequencing and gene expression studies in Prymnesium; and the use of remote sensing technologies for quantification of water quality in regional lakes.

To learn more about this research, visit Dr. Hambright's web page.

 

Ph.D., Cornell University

M.Sc., Texas Christian University

B.Sc., University of North Carolina, Charlotte

 

 

Back to Biology Faculty


Representative publications:

  • Remmel, E.J. and K.D. Hambright. 2012. Toxin-assisted micropredation: Experimental evidence shows that contact micropredation rather than exotoxicity is the role of Prymnesium toxins. Ecology Letters 15: 126-132.

  • Zamor, R.M., K.L. Glenn, and K.D. Hambright. 2012. Incorporating molecular tools into routine HAB monitoring programs: using qPCR to track invasive Prymnesium. Harmful Algae 15:1-7.

  • Hargrave, C.W., K.D. Hambright, & L.J. Weider. 2011. Variation in resource consumption across a gradient of increasing intra- and interspecific richness. Ecology 92:1226-1235.

  • Remmel, E.J., N. Kohmescher, J.H. Larson, & K.D. Hambright. 2011. An experimental analysis of harmful algae-zooplankton interactions and the ultimate defense. Limnology and Oceanography 56:461-470.

  • Hambright, K.D., R.M. Zamor, J.D. Easton, K.G. Looper, E.J. Remmel, & A.C. Easton. 2010. Dynamics of an invasive toxigenic protist in a subtropical reservoir. Harmful Algae 9:568-577.

  • Cichewicz, R.H. & K.D. Hambright. 2010. A revised amino group pKa for prymnesins does not provide decisive evidence for a pH-dependent mechanism of Prymnesium parvum’s toxicity. Toxicon 55:1035-1037.

  • Henrikson, J.C. M.S. Gharfeh, A.C. Easton, J.D. Easton, K.L. Glenn, S.L. Mooberry, K.D. Hambright, R.H. Cichewicz. 2010. Reassessing the ichthyotoxin profile of cultured Prymnesium parvum (Golden Algae) and comparing it to samples collected from recent freshwater bloom and fish kill events in North America. Toxicon 55:1396-1404.

  • Hambright, K.D. 2008. Long-term zooplankton body size and species changes in a subtropical lake: implications for lake management. Fundamental and Applied Limnology 173:1-13.

  • Hambright, K.D., T. Zohary, W. Eckert, S. Schwartz, C.L. Schelske, and P.R. Leavitt. 2008. Human engineered hydrological changes: exploitation and destabilization of the Sea of Galilee. Ecological Applications 18:1591-1603.

  • Hambright, K.D., T. Zohary, and H. Güde. 2007. Microzooplankton dominate carbon flow and nutrient cycling in a warm subtropical freshwater lake. Limnology and Oceanography 52:1018-1025.


 

 

 

OU Home

College of Arts and Sciences

Email Webmaster