Raymond, P. R.. College of William and Mary, raymond@vims.edu
Bauer, J. R.. College of William and Mary, bauer@vims.edu

 
ESTIMATION OF NET METABOLISM IN THE YORK RIVER ESTUARY USING INORGANIC CARBON MEASUREMENTS
 
We investigated the cycling of CO2 and dissolved inorganic carbon (DIC) in the York River Estuary (Virginia) in order to quantitatively estimate the metabolic state of this system. The estuary was a net source of atmospheric CO2 year round, and DIC mixing curves indicate a DIC source within the estuary. The seasonal patterns for these two CO2 sinks were similar, and repeated themselves over a two year study period. We argue that the source that balances these two sinks is net heterotrophy (total respiration>primary production) within the estuary. Atmospheric evasion of CO2 and DIC build up were then quantified in order to estimate monthly estimates of net heterotrophy in the York River Estuary for the period of July 1996 to December 1997. Net heterotrophy was estimated to account for the remineralization of about 100 g of C/m2/year. We believe this method for estimating net heterotrophy in estuaries is a relatively easy one, and allows for the evaluation of spatial and temporal dynamics of net metabolism with in estuaries.
 
Day: Tuesday, Feb. 2
Time: 04:15 - 04:30pm
Location: Eldorado Hotel
 
Code: SS34TU0415E