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Christine Badger - Photobiology and
Solar UV Radiation
Fairleigh Dickinson University, New Jersey
Export of Dissolved Inorganic and Organic Carbon from a Tidal Marsh
The export of dissolved inorganic carbon (DIC) and organic carbon (DOC) wasstudied in a low elevation tidal marsh in a sub-estuary of the Chesapeake Bay.Samples were collected during ebbing tide (weekly from May 31 to July 27) as well as over two tidal cycles following a salinity gradient from a freshwater end-member to the marsh creek, and a transect out to the Bay. DIC and DOC levels were consistently higher in the middle of the marsh than in either the freshwater sites or the sites closer to the estuary. Tidal sampling showed that both DIC andDOC had maximum concentrations in the water draining off of the adjacent waters.The colored dissolved organic matter (CDOM) exported from the marsh had optical properties indicative of relatively high molecular weight and high aromaticity compared to freshwater and estuarine dominated CDOM. Carbon dioxide levels in the middle of the marsh were on average 33 times higher than atmospheric equilibrium.This research project was presented as a poster at the American Society of Limnology & Oceanography 2007 Aquatic Sciences meeting in Santa Fe, New Mexico.
Funding provided by the National Science Foundation – Research Experience for
Undergraduates (REU)