New review article just out in Frontiers in Ecology & Evolution

A new review article has just appeared in Frontiers in Ecology & Evolution which highlights the impacts of nitrogen and phosphorus across different levels of biological organization (i.e., genomes to natural and agricultural ecosystems).  This collaborative work was the result of discussions and presentations at a Royal Society Theo Murphy Conference held at the Kavli International Conference Center at Chicheley Hall, U.K. from 1-2 June 2015.

Congratulations to Christian Brewer!

Congratulations to Christian Brewer, who successfully defended his B.S. Honors (Biology) Thesis today.  The title of his thesis is “Phototactic Response in Naïve Daphnia pulicaria to Chemical Cues from an Invasive Predator”.  Great job, Christian!

L-R: Christian Brewer is congratulated by L.J. Weider on the successful defense of his B.S. Honors (Biology Thesis.


Interesting new paper – maladaptation in resurrected Daphnia from heavy metal contaminated sediments

A dispatch article (“A crustacean time capsule” by P. Monahan) in Frontiers in Ecology and the Environment highlights a new paper (Rogalski. 2017 American Naturalist ) that examines maladaptation in resurrected populations of Daphnia ambigua to heavy metal contamination in lake sediments.  These results are quite interesting and puzzling at the same time.

Congratulations are in order!

Congratulations to Emily Kiehnau on receiving both a summer 2017 and academic year 2017-2018 Adams Scholarship to support her research on the interactions of the spiny waterflea, Bythotrephes longimanus, and its Daphnia prey.

Welcome to “waterflea world”

My name is Larry Weider and I am a professor in the Department of Biology here at The University of Oklahoma.  This is my lab’s website and is a work-in-progress.  I will continue populating the website with useful information about the research that my lab group and I have been conducting over the past number of years.  If you would like to contact me, my email address is Thanks!