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Map Layer for Marine Managed Areas of the United States: National Estuarine Research Reserve System Digital Boundaries

Published by National Oceanic and Atmospheric Administration, Department of Commerce | National Oceanic and Atmospheric Administration, Department of Commerce | Metadata Last Checked: December 19, 2025 | Last Modified: 2005-01-01T00:00:00.000+00:00
The National Estuarine Research Reserve System is a network of 29 estuarine areas—places where freshwater from the land mixes with saltwater from the sea—established across the nation for long-term research, education, and coastal stewardship.

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