Burd, A. B. Texas A&M University, adrian@halodule.tamu.edu
Eldridge, P. B. U.S. E.P.A., peldridg@nitro.tamu.edu

 
A MODEL OF THE LIGHT AND SEDIMENT INTERACTIONS OF SEAGRASSES.
 
The Laguna Madre lies along the south-eastern coast of Texas and contains most of the seagrass meadows in Texas. Dramatic declines in seagrass populations around the United States have recently been reported. These declines have been attributed to, for example, a reduction in light levels resulting from eutrophication and the impact of human activities such as dredging. We present results from a seagrass biomass model that incorporates both light and sediment interactions. The model includes nutrient limitations and sediment toxicity. Such models can help in both understanding the reasons for seagrass decline and the formulation of conservation strategies. The model is formulated for Halodule wrightii and calibrated using data taken in the Laguna Madre during 1996-1997. The relative importance of the light field and sediment interactions are investigated using various runs of the model. We present results showing the effects of various interactions between the sediments and the seagrasses.
 
Day: Thursday, Feb. 4
Time: Poster
Location: Sweeney Center
 
Code: CS63TH0484S