Protecting Critical Dune and Beach Habitat
The Pinelands Preservation Alliance and Raritan Valley Community College (RVCC) are launching their third year of partnership in helping to protect critical dune habitat along New Jersey’s coast. Grants from the New Jersey Sea Grant Consortium, the National Fish & Wildlife Foundation and Wells Fargo have made this project possible.
The goal of this joint project is to proactively improve shoreline community resilience by implementing ecological management techniques along the upper beach. This is done by creating plant protection zones where no beach raking or driving is allowed, which allows for the natural development of dunes and the enhancement of habitat for several threatened and endangered plants and animals that depend upon these areas for survival.
Currently, ecological beach management efforts in New Jersey encompass a small portion of the coastline and yet they could be implemented with little impact on existing recreational uses of the beach. Activities such as fishing, driving, swimming and sunbathing are concentrated towards the lower beach (closer to the water) while beach nesting birds and beach plants are concentrated towards the upper beach (near the foot of the dune). Traditionally we have only focused our management efforts on protecting the dunes and have largely ignored maintaining our beaches in an eco-friendly manner resulting in driving and/or raking the entire length of the beach profile.
[+ ZOOM] Management status of coastal communities as of spring 2018.
This project seeks to implement compromise management that maximizes the benefits for both recreational use and shoreline protection by restricting driving and raking along the back portions of the beach. Consequently, the back beach, once suppressed by beach raking and vehicle use, becomes free to develop naturally allowing native plants and animals to flourish, increasing beach stabilization, and encouraging the natural development of new dunes.
Fostering the natural development of dunes offers substantial rewards for coastal communities at little to no cost. New Jersey has spent well over one billion dollars, more than any other state in the country, on beach replenishment. According to Dr. Jay Kelly, Associate Professor in Biology at Raritan Valley Community College, protected beaches allow for greatly reduced erosion and/or increased sediment deposition compared to beaches that are raked or overridden by vehicles. Our preliminary research suggests that if all of the areas that are currently being mechanically raked along the NJ shoreline were managed ecologically, it could reduce beach replenishment costs by as much as $5-10 million per year in the state.
Project Successes and Future Prospects
This simple and inexpensive form of management has already produced results. In 2016, the first year of this project, the federally listed Seabeach Amaranth was found in exclosures in two of the four state beaches, Island Beach State Park and Brigantine, the state listed Seabeach Evening Primrose was found in Cape May Point and Corson’s Inlet, Oystercatchers nested in exclosures in North Brigantine Natural Area and Piping Ploverssuccessfully nested in Island Beach for the first time in over 20 years. Protections implemented even longer at Island Beach State Park have greatly enhanced the natural recovery of dunes following Hurricane Sandy.
[+ ZOOM] Island Beach State Park - No Management[+ ZOOM] Island Beach State Park with management.
The Piping Plover again nested at Island Beach State Park in 2017, and Seabeach Amaranth occurred in six locations of improved ecological beach management, including Port Monmouth, Belmar, Island Beach, Harvey Cedars, Brigantine and Corson’s inlet. These are locations that have had few if any Seabeach Amaranth occurrences in the past 16 years and further highlight how impactful the simple measure of protection our upper beaches can be.
For the third year of the project we will build upon our successes on our state beaches and expand our work to include municipalities. This will fill important habitat and resiliency gaps along our coast helping to address our statewide goals of habitat protection and coastal community protections.
How are Coastal Dunes Created?
Coastal beaches and dunes are dynamic structures created from the interactions of wind, water, and sand. In the summer when waves are calmer, upper beaches contain annual plants, wrack (natural debris), shells, and other natural features. These features disappear in the winter when winds and waves are stronger, washing over the beach. However, when enough sand accumulates, portions of the upper beach start to form young dunes that escape the winter tide. As succession occurs, accumulation of sand buries old plants as new ones grow to allow further build-up of the dune. Strong storm tides may wash away large sections of the upper beach and dunes causing the process to cycle back to the beginning.
Lower Beach: Wrack, natural debris, is deposited at the high tide mark. Due to consistent flooding from the tides, this area of the beach stays unvegetated.
Upper Beach: Storm tides deposit wrack, including seeds, on the upper beach. Infrequent flooding promotes plant growth, resulting in vegetation dominated by sea rocket and seaside spurge.
Mature Dune: As the dunes mature, Amercian beachgrass becomes the predominant vegetation. Mature dunes serve as the first line of defense during storm events.
Creating Habitat for Threatened and Endangered Species
[+ ZOOM] Seabeach Amaranth[+ ZOOM] Piping Plover
Pioneer beach plants serve the vital function of collecting sand and stabilizing young dunes. Seabeach Amaranth (Amaranthus pumilus), federally threatened, and other state endangered plants, such as seabeach knotweed and seaside sandwort, utilize the upper beach. Intensive human use of the upper beach results in the destruction of habitat and threatens their survival. Seabeach amaranth was thought to be extinct in New Jersey for over 80 years, until it was rediscovered in 2000. Habitat protection has helped keep this plant from becoming locally extinct again.
Piping Plovers (Charadrius melodus) are a federally threatened shorebird. Plovers and other rare birds such as least terns, black skimmers, and American oystercatchers use the upper portion of the beach to nest and rear young. Plovers and other threatened shorebirds, such as the federally threatened Red Knot (Calidris canutus rufa), require the intertidal zone for foraging in preparation for long migrations. Red knots have one of the longest migrations, traveling between the Arctic, where they breed in the summer, to the southern tip of South America, where they over winter. New Jersey’s shoreline is vital in providing the food they need to make their migration successful. Northeastern Beach Tiger Beetles (Cicindela dorsalis dorsalis) are federally threatened, and lay eggs in the back beach and upper intertidal zone. Larvae develop in tubular burrows in the intertidal zone and feed on small insects that cross by. Adults retreat to the dunes at night and feed on insects, crabs, and fish in the intertidal zone during the day.
Public & Private Beach Communities in Atlantic, Cape May, Monmouth and Ocean County are invited to participate:
If your town or privately-owned beach does not have a plant protection strips, the Pinelands Preservation Alliance and Raritan Valley Community College would like to partner with you and your town to help manage your beach in a proactive and eco-friendly manner. All public and private entities in Monmouth, Ocean, Atlantic, and Cape May Counties are eligible for this free management opportunity.
PPA and RVCC will:
- Install temporary fencing and signage in late April/early May
- Provide maintenance throughout the summer
- Take down temporary fencing in the Fall
- Provide Educational outreach to your communities on the importance of these practices in the form of news articles, letters, pamphlets, and presentation.
- Monitor/collect data to document the effectiveness of the fencing at stimulating the growth of vegetation and/or sediment accretion
For more information on how to get your community involve or to schedule a presentation please contact Ryan Rebozo, Ph.D. Director of Conservation Science for the Pinelands Preservation Alliance.
Phone: 609-859-8860 ext 126
See our Protecting Shoreline Communities Rack Card.