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Understanding Lag Times Affecting the Improvement of Water Quality in the Chesapeake Bay

Available in digital format and hardcopy. Better quantifying the lag time between changes in nutrient and sediment sources in the Chesapeake Bay watershed and improvement in the Bays water quality and submerged aquatic vegetation (SAV) is critical to help resource managers to implement the most effective nutrient and sediment reduction strategies and for scientists to improve monitoring and modeling. There is a large degree of uncertainty about the lag time between implementing nutrient and sediment best management practices and detecting an actual improvement of water quality and SAV in the Bay. Results from this Scientific and Technical Advisory Committee (STAC) workshop suggest that lag times associated with implementation of management practices, impacts of watershed properties, and response of the Bay water quality will make it very difficult to meet water-quality criteria in the Bay by 2010. However, the information about lag times can be used by resource managers to prioritize implementation of practices that provide the most rapid improvement in water quality and improve models and monitoring.

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Spatial Management in the Chesapeake Bay: Applications, Issues, and Opportunities

Available in digital format and hardcopy. Globally and nationally, persuasive arguments have been developed to promote increased implementation of spatial measures to conserve and protect marine ecosystems, to preserve or restore biodiversity, to protect habitats, and to be applied as tools that are alternatives or supplements to conventional fisheries management. The Scientific and Technical Advisory Committee (STAC) recognized that it was important to define what might be achieved through designation of Marine Protected Areas (MPAs) and other spatial management tools in the Bay and its watershed that could not be achieved through conventional management, or could be achieved with greater probability of success and more economically through spatial management. Workshop participants represented a diverse group of stakeholders, management agencies, and academia and several concerns were identified and recommendations made which are included in this workshop report.

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Chesapeake Bay Submerged Aquatic Vegetation Water Quality and Habitat Based Requirements and Restora

The second SAV Technical Synthesis revises and updates the first synthesis, by providing new light requirements for SAV through the water column and at the leaf surface, providing diagnostic tools for their application and interpretation, and identifying preliminary sets of physical, chemical, and other biological habitat requirements.

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