Summer is fast approaching and soon many of us will be making regular trips to our favorite beaches along the Atlantic coast. Once you’ve made it to that special place where the water meets the sand, you are bound encounter the same warning sign, “Stay off the Dunes.” Have you ever wondered why we are asked to tread lightly on those seemingly ever-shifting dunes?
A healthy dune system is important for ecological and physical reasons. Sand dune vegetation is uniquely adapted to thrive in stressful conditions such as extreme heat, salt spray, drought, limited nutrients and shifting sands. This vegetation provides habitat, including nesting sites, to birds, small mammals, reptiles, amphibians and insects. Dunes also provide a physical barrier to the harsh conditions of the sea and act as a reservoir for beach nourishment.
Sand dunes protect coastal areas from high winds, salt spray, storms, flooding and erosion due to wave and wind energy. Along the mid-Atlantic seaboard, wave and wind action cause these dunes to shift over time – a natural phenomenon. In many areas, human development over the past century has upset the balance of this natural system and the coastal dune system has degraded over the years.
Development has also made it necessary to minimize the natural migration of shifting systems in order to maintain the built infrastructure. Mankind is only now beginning to find ways to work with nature so that the dunes are preserved and development is better planned to reduce adverse impacts to this habitat.
Naval Air Station Oceana (NASO) – Dam Neck Annex maintains nearly 1,100 acres of land, including four miles of beachfront property on Virginia’s Atlantic coast. The base’s coastal habitat communities contain primary sand dune structures, and marshes. Many of the dunes at the base are degraded or require stabilization. In their present condition, they are eroding along the trailing edge resulting in lost habitat with the potential to hinder base operations.
It is a long-term objective to stabilize these dunes by planting native grasses and installing dune fencing so a protective barrier can be maintained while ensuring the mission of the naval base is not compromised. Working with community volunteers to plant these grasses provides an opportunity to educate local citizens about the importance of dune communities as coastal habitat and provide them with a hands-on opportunity for restoration activities.
The National Aquarium has been working with its partners at Command Navy Region Mid-Atlantic, the Naval Facilities Engineering Command Mid-Atlantic, and the Virginia Aquarium and Marine Science Center since 2007 to restore sand dunes on the base. Our most recent project (May 16-17) included engaging more than 60 volunteers in the planting of 15,000 native dune grasses and installing dune fences to help stabilize the shoreline and provide habitat.
We will be returning again in the fall of 2014 to continue the work. If you are interested in joining us, click here!