Dr. Biddle's research interests include microbial ecology of benthic microorganisms, particularly those in the subsurface marine environment. Her work has examined everything from the isotopic characterization of subsurface cells to the first subsurface metagenome study, all to discover what microbes are present meters beneath the seafloor and how and why they survive in this extreme environment. Additional research projects include genomics of uncultivated microorganisms and molecular characterization of novel environments. She has written a number of articles that were published in professional journals, including Proceedings of the National Academy of Sciences, USA, PLoS One and Geomicrobiology Journal. She will be examining Pavilion Lake Microbialites to do detailed molecular studies on their microbial communities. Her portion of the project is currently funded by the Delaware Space Grant Consortium.