Weider Lab Fall 2017: Back Row: L-R: Larry Weider, Jake Scott, Emily Kiehnau, Michael Onwuchuruba, Ronak Tapiavala; Front Row: L-R: Ritu Kulkarni, Rachel Hartnett
2012-15 Dr. Joaquin Muńoz, U. of Oklahoma Biological Station/Sevilla, Spain
2010-13 Dr. Philip Morton, U. of Oklahoma Biological Station (currently an Assistant Professor and Dept Chair, Murray State College, OK)
2007-15 Dr. Dagmar Frisch, U. of Oklahoma Biological Station (currently a Marie Sklodowska-Curie Research Fellow, School of Biosciences, U. of Birmingham, U.K.)
2006-07 Dr. James Larson, U. of Oklahoma Biological Station (currently a Research Scientist, USGS Upper Midwest Environmental Science Center, La Crosse, Wisconsin)
2005-06 Dr. Chad Hargrave, U. of Oklahoma Biological Station (currently an Associate Professor, Dept. of Biological Sciences, Sam Houston State U., Texas)
2000-01 Dr. Richard Broughton, Dept. of Zoology/Biological Station, U. of Oklahoma (currently Professor and Chair, OU Dept. of Biology)
1997 Dr. Martin Cerny, Dept. of Hydrobiology, Charles University, Prague, Czech Rep.
1994-96 Dr. Piet Spaak, Centre for Limnology, Netherlands Inst. of Ecology, Nieuwersluis, NL(currently Head of the Dept. of Aquatic Ecology, EAWAG, Dubdendorf, Switzerland)
1995 Dr. France Dufresne, Dept. of Zoology, U. of Guelph, Ontario, Canada. (currently an Associate Professor, Dept. of Biology, U. of Quebec at Rimouski)
1994-95 Dr. Luc De Meester, Laboratory of Animal Ecology, U. of Ghent, Belgium. (currently a Professor, Dept. of Biology, KU-Leuven, Belgium)
1991-93 Dr. Joanna Pijanowska, Department of Hydrobiology, U. of Warsaw, Poland.
Previous Graduate Students:
2012-2017 Rachel Harnett (Ph.D., former NSF Graduate Research Fellow)
Dr. Hartnett’s work has focused on how population dynamics influence community properties using Daphnia as a model organism. She has been interested in potential mechanisms of size-distribution variation along an increasing experimental scale of size and ecological complexity (from life-history to mesocosm experiments). From this work, she has focused on two main arms: 1) mechanisms and patterns of size distributions, and 2) the role of species evenness in community theory and application. Rachel successfully defended her Ph.D. dissertation in November 2017, and was awarded her doctorate in December 2017. She was awarded and has accepted one of the inaugural Diversity Postdoctoral Fellowships in the College of Arts & Sciences (CAS) at Oklahoma State University. She took up her new position effective 1 July 2018. Please visit her website http://www.rnhartnett.net for more information.
2010-16 Billy Culver (Ph.D. student, U. of Oklahoma) (currently an Assistant Professor, Dept. of Natural Sciences, Centenary Univ., N.J.)
2013-15 Aime’e Yousey (M.S. student, U. of Oklahoma) (currently Assistant-to-the-Chair, OU Dept. of Educational Psychology)
2008-10 Mingyan Lin (M.S., U. of Oklahoma)
2002-07 Punidan Jeyasingh (Ph.D., U. of Oklahoma) (currently an Associate Professor, Dept. of Integrative Biology, Oklahoma State Univ.)
2000-01 Wenjun Wang (Ph.D. student, U. of Oklahoma)
1997-00 Petra Limburg (Ph.D., U. of Kiel, Germany) (currently in the private sector in Germany)
1996-99 Thomas Berendonk (Ph.D., U. of Kiel, Germany) (currently Professor of Limnology, Technical University-Dresden, Germany)
1997-98 Angelika Denk (M.Sc. student, U. of Regensburg, Germany)
1994-97 Suzanne E. Mitchell (Ph.D. – NERC-CASE, U. of Hull, England) (currently Director, Aeona Limited, Edinburgh, Scotland)
1997 Lilla Pokutta (M.Sc. – U. of Hamburg, Germany)
1989-90 Mary H. Murdoch (M.Sc. – U. of Windsor, Canada) (currently Principal, Stantec Environmental Services, Fredericton, New Brunswick, Canada)
Previous Undergraduate Students:
2017-2018 Ronak Tapiavala (B.S., U. of Oklahoma)
Ronak’s research project involved the study of the artificial sweetener sucralose, and its potential impact on physiological and metabolic aspects of Daphnia. Sucralose is one of the main ingredients found in the artificial sweetener, Splenda, which is found in a wide variety of low-calorie beverages. Given that sucralose is quite “metabolically stable”, much of it ends up into aquatic ecosystems via waste-water run-off. Its role as a man-made eco-toxicant remains to be fully examined. One of the major assays that Ronak performed involved testing the effects of sucralose on the heart rate of various clones of Daphnia, including both modern-day clones, as well as “ancient” (centuries-old) clones to determine if modern Daphnia clones have adapted to this artificial sweetener. Here is a video clip of a Daphnia pulicaria female (carrying eggs/embryos) that has been exposed to sucralose. You can see the beating heart just above the brood chamber (containing developing embryos). Ronak graduated from OU in May 2018. He is in the process of applying to Dental School for fall 2019.
2017 – 2018 Jake Scott (B.S., U. of Oklahoma)
Jake joined our lab in fall 2017. He completed his independent study project in spring 2018, which was a comparative study on the “nutritional ecology” of several different algal food types and their impact on growth and reproduction among several species of Daphnia, including D. pulicaria, and D. mendotae. He plans on graduating from OU in May 2019.
2016-17 Michael Onwuchuruba (B.S., National Merit Scholar, U. of Oklahoma). Michael graduated from OU in May 2018 and is applying to medical/DO schools for fall 2019.
2016-17 Christian Brewer (B.S., U. of Oklahoma, National Merit Scholar, OU Honors College)(Christian started medical school in August 2017 at UT-Southwestern in Dallas).
2015-16 Hayley Severson (B.S., U. of Oklahoma, National Merit Scholar, UROP award winner) (Hayley completed her Masters of Public Health, U. of Wisconsin-Madison, and began medical school at UWM in fall 2017).
2012-2016 Frank “Weston” Speer (B.S. Biology, 2016, U. of Oklahoma; UROP award winner)
Weston’s research project involved the study of the aquatic crustacean (brine shrimp) Artemia franciscana, a prominent model organism. With the aid of international colleagues, he obtained A. franciscana populations from several different countries. His project aimed to determine the optimal hatching cues for these populations. Additionally, he engineered a novel hatchery system that could be applied to an array of aquatic organisms. The results of his independent study research were recently published in the journal Hydrobiologia. Currently, he is conducting nuclear imaging research in the Oklahoma City area. In August 2018, he will begin medical school at Oklahoma State University (OSU)-Tulsa.
2015 Arianne Rick (B.S., U. of Oklahoma, OU Honors College) (will begin dental school at the U. of Florida in fall 2017)
2011-13 Jeff Medders (B.S., U. of Oklahoma)
2012-13 Alex Mutz (B.S., U. of Oklahoma)
2011 Rosa Yorks (B.S. , Oklahoma State Univ.)
2011 Tiffany Glover (B.S., Langston Univ., Oklahoma)
2011 Garrett Schulze (Kingston High, Oklahoma)
2011 Kelsie Montgomery (high-school student, Red River Technology Center, Oklahoma)
2010 Michael Leitch (B.S., U. of Oklahoma)
2005-06 Laura Harolds (B.S. Honors, U. of Oklahoma, UROP award winner)
2003 Andrea Bean (B.S., U. of Oklahoma)
2003 Jaime Ramos (B.S., U. of Oklahoma)
2002 Robyn Moran (B.S., S.W. Okla. State)
2002 Lynette Matthews (B.S., Arizona State U.)
2002 Amy Ramsey (B.S., Botany, U. of Oklahoma)
2001 Jeremiah Smith (B.S., U. of Oklahoma)
2001 Kim Land (B.S., U. of Oklahoma)
2000 Amanda Warren (B.S., U. of Oklahoma)
1992 Gerhard Griebe (B.Sc. honors – U. of Oldenburg, Germany)
1992 Andreas Heinken (B.Sc. – Free University – Berlin, Germany)
1992 Adrian Howe (B.Sc. – EC Comet Program, U. of Swansea, Wales)
1989-90 Catherine Delvanminck (B.Sc. honors – U. of Windsor, Canada)