Coastal wetland ecosystems like salt marshes, mangroves, and seagrasses accumulate carbon at a disproportionately high rate relative to their areal extent. Because of their ability to store carbon, there has been a push to restore blue carbon ecosystems to abate anthropogenic greenhouse gas (GHG) emissions. However, there is a need to better understand and predict the carbon dynamics in these ecosystems before they can be used as reliable carbon offset mechanisms. The saturated and anoxic conditions in these ecosystems are one of the most widely cited reasons why they store large amounts of carbon, yet the relationship between hydrology and the preservation and transport of blue carbon is not well studied. In addition, the hydrology of restoration sites can remain altered for many years and may never reach functional equivalence to natural sites. This study will investigate how hydrology influences the preservation and exchange (gaseous and dissolved) of blue carbon in natural and restored salt marshes of various ages in the upper Bay of Fundy. Preliminary results presented will include links between salt marsh hydroperiod and GHG fluxes and blue carbon stocks in the study sites. Preliminary estimates of lateral dissolved organic carbon (DOC) export over spring and neap tidal cycles will also be presented. The results of this study will help clarify the role hydrology plays in the preservation and transport of blue carbon from coastal ecosystems and help to refine coastal carbon budgets in hypertidal systems.