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Oyster restoration efforts are increasingly challenged by anthropogenic influences such as run-off, sea level rise, decreased
salinity and pH, and other factors. Populations of Eastern oysters, Crassostrea virginica, along the Atlantic coast of US are
only 1-3% of historic population levels and further declines would be catastrophic. Oysters are essential as a ?keystone species?
that provides habitat and spawning substrate, stabilization of sediments, and a natural filtration system to clarify waters. Depth
and salinity greatly affect oyster populations and their associated fauna. Theycan tolerate a wide range of salinity, temperature,
turbidity, anddissolved oxygen. Oysters occur where the annual temperature can range between -2 to 36�C. Large long-term
populations are found at salinities between 5 and 40 . In an attempt to enhance the oyster populations and improve water quality
conditions in Delaware, an oyster gardening restoration program initiated. A variety of culturing techniques including subtidal
modified rack and bag aquaculture, oyster cages, Taylor floats, and created oyster reefs have been used to investigate ecological and
biological impacts of these efforts. Oyster survival looked promising, ranging from 100% to 74% survival. Natural recruitment of
oysters have been observed on oysters in floats and nearby riprap, which may be a promising sign that oysters in the gardening
program are reproducing within the Delaware Inland Bays. The timing and magnitude of deleterious effects of climate change on
aquatic systems have yet to be determined. However, precautions to mitigate repercussions must be undertaken now if we are to
have any hope of protecting this valuable natural resourcey
Biography
Dr. Ozbay is a Research Professor in the Department of Agriculture and Natural Resources in Delaware State University. Her research interests are
in the area of habitat restoration and water quality issues, specifically water quality driven toxicity in harmful algae, shellfish-algae dynamics, nutrient
and water quality management, aquatic ecology and bacterial monitoring. She received her PhD. in Fisheries and Allied Aquacultures at Auburn
University, Auburn, Alabama in 2002. She conducted research leading to the development of aquaculture effluent water quality standards for the U.S.
Environmental Protection Agency as her PhD. project. Dr. Ozbay has advised 15 graduate and 50 undergraduate students and has served other 15
graduate students? committees. She has received several outstanding researcher awards at the national, regional and institutional levels. She serves
as an Editorial Board Member for the five different journals and former Executive Board Member for Atlantic Estuarine Research Society. She also
serves in the Research Advisory Committee for NOAA-LMRCSC, Technical Advisory Committee for the Northeast Aquaculture Center, currently as
co-chair, and the Center for the Inland Bays
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