Gregory-Eaves Lab



Joanna Gauthier

Ph.D. student
Ph.D. student, co-supervised by David Walsh, University Concordia


Proposed thesis title: "Environmental DNA preserved in lake sediments: An innovative approach to track the dynamics of sockeye salmon nursery lakes over ~200 years"

Research summary:
The application of next-generation sequencing (NGS) to environmental DNA (eDNA) is an emerging field that is answering theoretical and applied questions in biodiversity science. Recent advances have proven that eDNA is effective in detecting endangered and rare species as well as invasive species in a cup of water. However, there is considerable uncertainty over which environmental conditions lend themselves to adequate preservation of DNA in lake sediments. In my PhD project, I will apply molecular analyses within an ecological framework to evaluate whether we can use environmental DNA methods to improve our understanding of structure and functioning of sockeye salmon nursery lakes in the context of climatic change.

2014 íńž present¨›: PhD candidate, Department of Biology, McGill University
2010-2012¨›: MSc, Department of Biological Sciences, UQAM
2006-2009¨›: BSc, Department of Biological Sciences, UQAM

Gauthier, J., Y. T. Prairie and B. E. Beisner. 2014. Thermocline deepening and mixing alter zooplankton phenology, community biomass and body size in a whole-lake experiment. Freshwater Biology, doi:10.1111/fwb.12322.

Sastri, A. R., J. Gauthier, P. Juneau and B. E. Beisner. 2013. Biomass and productivity responses of zooplankton communities to experimental thermocline deepening. Limnology and Oceanography, 59(1): 1-16.