Craig Williamson
Global Change Limnology Laboratory

Undergraduate Students

Keiko WilkinsKeiko Wilkins joined the lab in 2015. During the summer of 2016, as part of a USS award, she studied the effects of hypoxia and anoxia on the abundance and vertical distribution of crustacean zooplankton within Lake Lacawac. After observing differences in the sensitivity of some species to anoxia in the lake versus the lab, she began to investigate the effects of hydrogen sulfide on the zooplankton living within the hypolimnion (bottom layer) of lakes. She is interested in doing marine biology research upon graduation.


Alessia Saul (standing) received a USS award to help implement a citizen science program for lakes in the Pocono region of Pennsylvania. PLEON, or the Pocono Lake Ecological Observatory Network, focuses on water quality education. Alessia designed PLEON's logo and web site. She also created an informational brochure, assisted with public presentations, and sampled lakes to better inform lake associations of their local water quality.



Past Undergraduate Student Projects

Matt Meeks Matt Meeks assisted others with zooplankton research at Lake Lacawac and Lake Giles in Pennsylvania during the summer. While conducting research on Daphnia surface avoidance one summer, Matt observed an event where large numbers of Daphnia infected with a Saprolegnia fungus died at the surface of lake Giles. Since parasites have shown a sensitivity to UV, Matt set out to explore the UV sensitivity of other aquatic parasites including Pastueria and Saprolegnia. He and his PhD mentor, Taylor Leach, were awarded a Doctoral Undergraduate Opportunity Scholarship (DUOS) to conduct this study.

Kate HackettKate Hackett was selected to be a 2012 Hughes Intern. She studied how optical properties of water from different sources change over time by incubating water samples in Lake Lacawac (Pennsylvania). Kate says "my experience was one of the highlights of my undergraduate career. I was able to take my research experience to a new level by planning and running my own independent experiment. Everything about this experience was truly hands on and it challenged me to think critically and expanded my scientific education while providing me with amazing friends and memories that I will not soon forget!"

Claire MeikleClaire Meikle, who earned a USS award in 2011, expanded her work on parasites and zooplankton to test the effects of UV on an amphibian parasite. Through the USS program, she was able to work with a new species, and collaborate with another lab in the department. Claire explains that "the USS program is a great opportunity for students to work closely with graduate students and faculty and to experiment with techniques. My USS project gave me the opportunity to expand my research and investigate new projects and venues of study, motivated me to learn about a new subject, and above all allowed me to develop my capabilities as a researcher and collaborator."

Cody GreenCody Green earned a USS award for summer 2009. Cody's research focused on reconstructing historic DOC patterns in Emerald Lake using sediment cores. He coupled patterns from the field with analyses using advanced instrumentation in the lab to contribute to a broader research question- how do changes in climate affect the diatom and zooplankton communities of alpine lakes?


Sam LeeSam Lee received a USS award for summer 2008. According to Sam, "the USS program allowed me to participate in something I would never have otherwise had the opportunity to experience. I had the opportunity to work in the best "office" I could imagine as part of a priceless, hands-on learning experience of every aspect of the research process. The only downside is that you can only participate in the USS program once!"


Mike CohenMike Cohen also was awarded a USS for summer 2008. Mike says, "the greatest part of the experience was getting to be out in Pennsylvania and Lake Tahoe and working long days outside. While most summer jobs keep people indoors, I got to spend my time outside working on projects that most people would never have the opportunity to experience. I would definitely recommend the USS program to other undergraduate students because it is the research experience of a lifetime, and it will help students decide whether or not research should be their career future."

Theresa Warner, a senior biochemistry major, investigated temporal changes in vertical profiles of dissolved oxygen in our Pocono lakes. The impact of climate change on temperature and dissolved oxygen in the water column has ecological consequences for many trophic levels from parasites to zooplankton to fish.