A stable isotope biogeochemist, Dr. Anderson's research focuses on biogeochemical cycling of carbon and nitrogen in marine systems, as well as the oxygen, carbon, and nitrogen isotopic signatures in organic material. This work/approach is focused on the calibration and reconstruction of the isotopic records from terrestrial and marine archives located in the US, Europe, and South America and Asia. Present work focuses on applying new continuous flow isotope ratio mass spectrometry (CF-IRMS) methods to biogeochemical-orientated projects in the Everglades, the Keys, Florida Bay, and other subtropical locations in South America and Asia. The goal of this approach is to better understand how changes in the hydrologic cycle and environmental conditions (nutrients, pCO2, stress, etc.) affect different biogeochemical systems, which aids in improving our understanding of past and present climatic change.