I am interested in the interaction of water and geologic materials. My interests thus span precipitation chemistry, soil- and ground-water, and fresh surface waters. Recent studies include paleolimnological analysis of lake and bog sediments for their contained information about acidic deposition (including metals) and its direct and indirect impacts on lakes and ombrogenic bogs, chemical manipulations of ecosystems or ecosystem components, and assessment of the impact of land surface pollution such as road salt. Recent research includes the study of the controls of Fe, Al, and dissolved organic carbon on P mobility in oligotrophic ecosystems. We are using empirical and experimental approaches at four sites in Maine, one in France, and two in the Czech Republic. My research is supported by the University’s state-of-the-art environmental chemistry laboratory and the stable isotope laboratory.