Limnology is the science of inland waters.  It is a multidisciplinary field, with physics, biology, chemistry, geology, social sciences, and others all strongly contributing to the understanding of the whole.  True to this spirit, work in my lab has covered a wide range of topics, but the center of gravity of all these is the field of Ecological Stoichiometry, which in simple terms is the study of how the nutrient content of organisms shapes their ecology.