James Easton
Postdoctoral Research Associate

Ph.D., 2003, Hebrew University of Jerusalem

I am currently investigating the toxicological and ecological role of Prymnesium parvum in Lake Texoma. My background is in organizing and working on lake monitoring and data collection. My interests are in zooplankton migration and spatial distribution, and predator driven fish -zooplankton interactions.

Dagmar Frisch
Postdoctoral Fellow, EU Marie Curie International Fellowship

Ph.D., 2000, Freie Universität Berlin, Germany

My current research with Larry Weider focuses on factors influencing the success of biological invasions, in particular microevolutionary processes vs. broad physiological tolerance to the environment. Two invasive zooplankton organisms are used as model species which have each invaded new continents across large geographical scales: Daphnia lumholtzi (Cladocera, Crustacea) in North America, and Acartia tonsa (Copepoda, Crustacea) in Europe. I am also involved in a project (with Andy Green at the Doñana Biological Station in Sevilla, Spain) on the dispersal biology of zooplankton and consequences of propagule dispersal on species and genetic diversity in temporary ponds.

James Larson
Postdoctoral Fellow

Ph.D., 2006, University of Notre Dame

I am currently investigating the interaction between nutrient cycling and toxicity using planktonic invertebrate communities. My background is in the controls and effects of dissolved organic matter in forested streams. My interests are in linking ecological stoichiometry with toxicological studies to investigate how sublethal concentrations of toxins influence ecosystem function.

Rickey Cothran
Doctoral Student, University of Oklahoma

I am interested in phenotypic evolution. Currently, I am studying the evolution of mating phenotypes in two freshwater amphipods species in the genus Hyalella.  Amphipods in the genus Hyalella provide an excellent opportunity to study key issues in behavioral ecology. Currently I am exploring how ecological context shapes the benefits of female choice, the relationship between resources and condition dependency of sexually selected traits, and precopulatory sexual conflict

Courtney Franssen
Masters Student, University of Oklahoma

I am a Masters student with Bill Matthews studying the affects of heavy metal contaminants on fish communities and more specifically on the reproduction of Gambusia affinis (Western mosquitofish). I am working in a system that is classified as an EPA superfund mega-site in northeastern Oklahoma that is impacted by outflow from abandoned lead and zinc mines.

David Gillette
Doctoral Student, University of Oklahoma

I am an aquatic ecologist, currently investigating the manner in which context of habitat patches affects secondary consumers via trophic pathways. With this work, I am taking theory from the field of landscape ecology and applying it in an aquatic setting. In addition to this primary focus, I am also involved in projects studying homogenization of fish assemblages, and the effects of fishes on ecosystem processes. My study organisms are fishes and aquatic macroinvertebrates, and I have conducted studies in lakes, rivers, streams and experimental mesocosms.

Rachael Remington
Doctoral Student, University of Oklahoma

The goal of my research is to investigate the ecology and evolution of turbidity tolerances in freshwater fishes. I conduct my ecological research at UOBS in outdoor experimental streams and indoor tanks. Some questions that I am addressing in my research include:  (1) What role does turbidity play in structuring fish communities?  (2) What are the advantages and disadvantages of turbid environments vs. clear water environments?  (3) Do fishes that have evolved in turbid waters have greater feeding success and/or greater predator avoidance abilities in turbid water?  (4) What are the morphological adaptations to living in turbid water?  (5) Where do these turbid phenotypes fit on a phylogenetic tree?

Richard Zamor
Doctoral Student, University of Oklahoma

My research interests include most aspects of fish ecology and fish community ecology. I graduated cum laude with a B.S. in Zoology from the Unversity of Oklahoma. Following this I completed my M.S. in forest resources (with a focus on fish ecology) under Gary Grossman at the University of Georgia. This research focused on the effects of turbidity on fish foraging. For my Ph.D. with David Hambright, I am researching the toxic and lethal effects of golden algae (Prymnesium parvum) on fishes. I also enjoy anything to do with Sooner football.

LAKE TEXOMA OFFICE

MAILING ADDRESS:

HC 71, Box 205
Kingston, OK 73439-9738

Phone: (405) 325-7431 OR
(580) 564-2478
Fax: (580) 564-2479

These pages maintained by
Donna Cobb and Amy Govert-Larson

NORMAN OFFICE

MAILING ADDRESS:

Richards Hall
730 Van Vleet Oval
Norman, OK 73019-6121

Phone: (405) 325-5391
Fax: (405) 325-0835