South Reeds Beach Oyster Reef Event Filmed by Local Delaware Bay Producer
By: Lindsay McNamara, Communications Manager
A record number of Red Knots were counted on New Jersey’s Delaware Bay this year, in part because of innovative restoration projects like our South Reeds Beach oyster reef.
Over 130 volunteers and veterans worked alongside Conserve Wildlife Foundation and American Littoral Society to establish a near-shore whelk shell bar at South Reeds Beach in Cape May Court House on the Delaware Bayshore in early April.
Shorebirds, like the federally listed Red Knot, depend on an uninterrupted supply of horseshoe crab eggs when they stopover in Delaware Bay during their migration. In recent years, countless horseshoe crab eggs have been lost because of the devastating storms that swept away the beaches they depend on.
The oyster reef was built to prevent sand loss from wind-driven waves. The approximately 200-foot project will test whether the reef bars help reduce beach erosion and create calmer water for spawning horseshoe crabs.
Learn more about the project and our “Shell-a-Bration” event in the video above produced by Kathleen Poliski of K. Productions, LLC!
The South Reeds Beach Oyster Reef is one of the many projects that American Littoral Society and Conserve Wildlife Foundation are working on to restore the ecology and economy of the Delaware Bayshore, thanks to generous funding by the National Fish and Wildlife Foundation. To learn more, visit RestoreNJBayshore.org.
Lindsay McNamara is the Communications Manager for Conserve Wildlife Foundation of New Jersey.
An Update on the 2015 Delaware Bay Shorebird Project
By: Dr. Larry Niles, LJ Niles Associates LLC
We had about 13,000 knots on the New Jersey side of the Delaware Bay (an additional reported 2,000 on the Delaware side of the Bay). Yesterday, we suffered strong NW winds in excess of 20 kts and the birds virtually disappeared. Our daily survey turned up about 6,000 knots, the rest we suspect, finding refuge in Egg Island and Goshen Marshes or with a flyover to Delaware.
We will know where they went today. The team will comb the Bayshore for shorebirds with a coordinated ground, boat and aerial survey. The birds gain weight in good time and we expect the first Arctic lift-offs by the 26th. At the current rate, most of the Bay’s population will be off to the Arctic by the 30th.
Above is a clip from a new video about knots and our work by Mitch Smith, a longtime supporter of the team and head of the Mitch Smith Media.
An Update on This Season’s Horseshoe Crab Spawn and Shorebird Migration, Ten Days In
By: Dr. Larry Niles, LJ Niles Associates LLC
Thousands of shorebirds now fill Delaware Bay’s beaches and marshes in a determined effort to regain lost reserves with free-for-the-taking fatty eggs of the horseshoe crab. The crab spawn began ten days ago and has gained momentum over the last week as the volume of eggs grows like a well-funded savings account. The eggs surface as each new female crab digs up egg clusters laid by other crabs or as wind-driven waves pound the always-fluid sandy beaches. At least 8,000 red knots slowly get fat on the eggs scattered on New Jersey’s Delaware Bay beaches.
Eggs on Beach
Both crabs and birds are the beneficiaries of the increasing number of beaches that are highly suitable for egg-laying. In October, 2012, Hurricane Sandy ravaged two-thirds of New Jersey’s best crab-spawning beaches, its strong westerly winds lifting sand and spreading it far from the sea’s edge. Left behind was a jagged sod bank, completely unsuitable for horseshoe crab breeding. The mucky sod starves eggs of oxygen or gasses them with hydrogen sulfide, the by-product of decaying mud.
The American Littoral Society, Conserve Wildlife Foundation of New Jersey, the U.S. Fish and Wildlife Service and the National Fish and Wildlife Foundation came to the rescue, restoring many of these beaches to a condition superior to that before Sandy. The restoration team even repaired damages that predated Sandy — beaches with tons of rubble that entrapped crabs in nasty concrete, killing them by the thousands. Now beaches like Thompson’s Beach and Fortescue Beach join the growing number of delicate sandy strands that provide excellent spawning habitat.
Thompson’s Beach Before and After Restoration
This week, eggs can be found in many places on the New Jersey side of Delaware Bay, and the birds have the freedom to move to those that best suit them. Earlier this month, strong northwest winds drove red knots from the Reeds Beach area to other, more northerly, beaches that saw good crab spawning — beaches that also provide shelter from the winds. Now that the wind and sea have calmed, the birds have returned to the Reeds Beach area, less than 20 miles away, and have resumed gorging on the plentiful eggs that built up in their absence.
Early Morning Shorebirds on Delaware Bay
If one were to look for any cloud on the Delaware Bay shorebird horizon, it would lie in the lack of any evidence of horseshoe crab recovery. The current, reduced, population of crabs spawned eggs in great numbers early this May because of a spike in the water temperature, a consequence of unusually warm weather. So far the promise of this early spawn is holding, and crabs continue to spawn in good numbers. But will it hold until the end of May?
Crabs in Slew
If not, the readers of this blog will witness the outcome. The graph below, developed by long-time team-member Dick Veitch tells the story of a past egg failure. In the early 2000’s, although the population of shorebirds had not yet declined to its current number, the crab population had already fallen to its current number, crushed by the onslaught of a poorly regulated fishing industry. In those years, all the horseshoe crabs that could spawn had finished by the third week of May and egg densities on the bay plummeted. The birds crammed into the few beaches with eggs like Mispillion Harbor, Delaware, so densely that the beach reeked of off-gassing urinary ammonia.
But the number of eggs there was not sufficient to feed the still-large shorebird populations and birds failed to reach a weight – about 180g for red knots — suitable for their journey to the Arctic and subsequent breeding. Where once 80% reached the “good” weight, only 5% did in 2003 (see the second graph).
Percentage of Red Knots Reaching 180 Grams
The percentage has improved thankfully, but only because the number of shorebirds have fallen over the last 10 years, bringing a balance of sorts. Hopefully, with the new beaches, the new protection afforded by the red knot listing and the growing number of volunteers taking part in conservation of the crab and birds, this kind of disaster is behind us.
Another Season of the Delaware Bay Shorebird Project Underway
By: Dr. Larry Niles, LJ Niles Associates LLC
Our 2015 Delaware Bay Shorebird Project began on one of the hottest early-May weekends in memory. Clive Minton, an English-expatriate Australian, and I began the project with an early morning survey of each bay beach – Reeds, Cooks, Kimbles, Pierces, Rutgers, Norburys, Villas – dripping sweat and swatting biting gnats as though it was early June, not early May. The sudden burst of summer weather warmed the bay waters, triggering our first horseshoe crab spawn providing sufficient eggs for newly arriving birds.
The birds, on the other hand, followed a more normal schedule. We counted only 400 knots, a smaller number of ruddy turnstones and, surprisingly, no sanderlings. We know the birds are en route; Pat Leary in Florida and Fletcher Smith in Georgia report good numbers of knots, but the birds appear stuck because of the unsettled weather and the rare occurrence of a tropical storm making landfall in North Carolina over the weekend. Soon enough they will come.
Red Knot Photo by: Pat O’Leary
The warm weather and the abundant crab spawn bode well for the birds – we want the early bird to gets eggs. But they point to one of the many difficulties facing the red knot and other shorebirds. Will the insidious effects of climate change unravel this elegant machine that provides horseshoe crabs eggs just at the time Arctic-nesting shorebird need them to fly on to their breeding areas?
Horseshoe Crab EggsHorseshoe Crabs Spawning
Our project is 19 years old and so provides a perspective virtually unique among wildlife projects. A long-running project of this kind has many advantages, not the least of which is the human family that has formed around our love of birds. We have nearly the same core team in 2015 as we did in 1997, losing and gaining a few team members as time marches on, but always maintaining an esprit de corp, a common purpose, a lasting bond. The shorebirds, the crabs and the many people who love the Delaware Bay owe a debt of gratitude to this team of intrepid researchers.
Photo by: Christophe Buidin
The project’s longevity also creates a perspective rare in the world of bird study. Over 19 years we have seen the collapse of the horseshoe crabs; the dramatic free fall of the red knot that resulted this year in a federal listing as Threatened; the rise of irresponsible commercial exploitation of the natural wealth of the bay; a devastating hurricane and more. And yet each year the birds arrive, the crabs spawn and our team coalesces from every corner of the world. Despite the problems and all the concern, the system persists.
But how long will the system persist?
The challenges faced by the birds grow every year. They cling to this amazing migratory bird like barnacles on a wooden boat. Crabs have not recovered from the devastating overharvest of 15 years ago. The international drug cartels still drain the blood of crabs for the valuable chemical lysate without any responsible management. All the while shorebirds, the red knot in particular, face growing threats from climate change: more frequent storms, destroyed coastal habitat, rapidly-changing arctic tundra habitats.
Herein lies the value of a long-term study. This season’s unprecedented early spawn and warm weather could be good or bad. Either way, by season’s end, the team’s dedication, skill, and plain hard work means we will know what happened and what it means compared to 18 other years.
Restoring Critical Delaware Bay Habitat for Migratory Shorebirds
By: Kelsey Lawler, Spring 2015 Intern
Photo Credit: Jan Van der Kam
Saturday, May 9 is International Migratory Bird Day (IMBD) 2015! It is time to celebrate and bring awareness to the spectacular event that is bird migration. Since 1993, IMBD has been serving as a celebration as well as a call to action for migratory bird conservation.
Conserve Wildlife Foundation of New Jersey has been doing their part for bird conservation. We have developed a range of programs to increase the numbers of endangered migratory birds, like the Red Knot, since their decline in the late 1990’s.
Red Knots use New Jersey’s Delaware Bayshore as a stopover for feeding after their long journey from the Arctic and South America. Delaware Bay plays a major part in the Red Knot life cycle, so we’ve focused our efforts on restoring this critical habitat. The Red Knot migration is timed to take advantage of the spawning of the horseshoe crabs that use the same beaches as breeding grounds. Their eggs provide a rich food source for the Red Knots at a time when they are in desperate need of nutrients.
We have been working to benefit both horseshoe crabs and the migratory shorebirds that feed on their eggs, like the Red Knot, through our beach restoration projects, oyster reef construction and monitoring projects. Since Superstorm Sandy, we have successfully restored over a mile of impacted horseshoe crab habitat. We’re working to further protect these beaches from erosion and to create calmer waters for horseshoe crabs through our oyster reef construction experiments. To learn more about our restoration work in Delaware Bay, visit RestoreNJBayshore.org.
Of course, we haven’t been able to do this work alone. Volunteers are one of the reasons why these projects are possible!
Celebrate International Migratory Bird Day by getting involved in migratory bird conservation:
CONTINUING THE 2015 RESTORATION SEASON AT FORTESCUE AND THOMPSON’S BEACH
By: Lindsay McNamara, Communications Coordinator
Spring on the Bayshore is in full swing, there are ospreys hunting in Dividing Creek.
Conserve Wildlife Foundation of New Jersey and American Littoral Society are moving right along with this season’s restoration work in Delaware Bay! Currently, we are working on projects on Fortescue Beach and Thompson’s Beach. Read more about our restoration work on RestoreNJBayshore.org.
Dr. Larry Niles of LJ Niles Associates LLC, a leader in efforts to protect red knots and horseshoe crabs for over 30 years, has shared updates throughout the month of April on the blog of RestoreNJBayshore.org:
Oyster Reef Build on South Reeds Beach a Huge Success
By: Lindsay McNamara, Communications Coordinator
Photo by: Lindsay McNamara
Over 130 volunteers and veterans worked alongside Conserve Wildlife Foundation of New Jerseyand American Littoral Society to establish a near-shore whelk shell bar at South Reeds Beach in Cape May Court House on the Delaware Bayshore on Saturday, April 4, 2015. The shell bar was built to prevent sand loss from wind-driven waves. During the “Shell-a-Bration,” an approximately 200-foot oyster reef was constructed offshore to test whether the reef bars help reduce beach erosion and create calmer water for spawning horseshoe crabs.
“We are rebuilding the habitats of Delaware Bay to strengthen its ecology, its communities and its economy. This reef approach will be a key technique which we will try to expand around the Bayshore,” stated Tim Dillingham, American Littoral Society Executive Director.
The South Reeds Beach Oyster Reef is one of the many projects that American Littoral Society and Conserve Wildlife Foundation are working on to restore the ecology and economy of the Delaware Bayshore, thanks to generous funding by the National Fish and Wildlife Foundation.
“The project focuses on creating resiliency in Delaware Bay beaches while improving their usefulness to horseshoe crabs. We have a great challenge: how do we create a reef to protect against damaging Bay storms without stopping horseshoe crabs from getting ashore to breed,” said Dr. Larry Niles, a biologist who leads the beach restoration efforts for Conserve Wildlife Foundation of New Jersey and American Littoral Society, and has studied Red Knots for three decades. “This project is an experiment to help us do both,” he added.
Shorebirds, like the federally listed Red Knot, depend on an uninterrupted supply of horseshoe crab eggs when they stopover in Delaware Bay during their migration. In recent years, countless horseshoe crab eggs have been lost because of the devastating storms that swept away the beaches they depend on.
“The time-honored migration of Red Knots to reach the eggs of these ancient horseshoe crabs is a wildlife spectacle of global significance right here in Delaware Bay,” explained David Wheeler, Conserve Wildlife Foundation of New Jersey Executive Director. “Red Knots come to New Jersey’s Delaware Bay from as far away as the southernmost tip of South America to feed on horseshoe crab eggs. It is vital that we promote coastal resiliency projects like this one to support the largest population of horseshoe crabs in the world, and the human communities of the Delaware Bayshore alike.”
The new oyster reef will attenuate waves but still allow for horseshoe crab breeding. In existing areas where crabs can breed without interruption, like creek mouths protected by sand shoals or rock jetties, egg densities can exceed ten times the egg densities on unprotected beaches.
The projects are being funded by National Fish and Wildlife Foundation (NFWF) through their Hurricane Sandy Coastal Resiliency Grants Program, and are being developed in partnership with U.S. Fish and Wildlife Service and New Jersey Division of Fish and Wildlife.
“The Delaware Bayshore is a perfect location to demonstrate how communities benefit from their connection to a healthy natural resource base – for fishing, boating, wildlife watching and tourism,” said David O’Neill, National Fish and Wildlife Foundation Vice President of Conservation Programs. “The economies of Bayshore towns have historically been intertwined with the bay. And with the NFWF Hurricane Sandy grant, American Littoral Society and Conserve Wildlife Foundation of New Jersey are already restoring shorelines to make Bayshore natural resources and communities more resilient for the future.”
Event guests enjoyed a barbecue and oysters, and family-friendly activities like a “Green Eggs in the Sand” Easter Egg Hunt. In addition, local leaders and biologists spoke to the attendees about the oyster reef project at a mid-day “Whelk-come.”
Conserve Wildlife Foundation of New Jersey and American Littoral Society have started this season’s restoration work in Delaware Bay! Currently, we are working on projects on Fortescue Beach and Thompson’s Beach. Read more about our restoration work on RestoreNJBayshore.org.
Dr. Larry Niles of LJ Niles Associates LLC, a leader in efforts to protect red knots and horseshoe crabs for over 30 years, has shared updates throughout the month of March on the blog of RestoreNJBayshore.org:
