Conserve Wildlife Blog

Archive for the ‘Habitat Restoration’ Category

Barnegat Light Habitat Maintenance – Prepping for Piping Plovers

Thursday, February 23rd, 2023

By Todd Pover, Senior Wildlife Biologist 

When the Barnegat Light habitat restoration was completed to benefit piping plovers several winters ago, the partners anticipated it would need periodic maintenance to keep it in optimal condition. As it has turned out, the inlet beach site has needed more frequent attention, an annual winter “touch-up” to prep the site for the nesting season. With this in mind, earlier this month, Todd Pover, CWF Senior Wildlife Biologist was on-site for nearly a week to oversee the habitat work. 

The maintenance this winter primarily focused on the two foraging ponds, as those features have proved critical to the success of the plovers utilizing the site. Thick vegetation was mechanically removed from about three-quarters of the perimeter of the large pond. Excessive vegetation can obstruct piping plovers, especially their chicks, from using the pond’s edge to feed. The heavy vegetation can also provide cover for predators. Meanwhile, the smaller pond was filled in with sand due to late fall/early winter storms and tidal surge. Although the small pond has needed to be “refreshed” each winter, this was the first time it had to be entirely re-dug. Experience has shown that having two ponds present at the site – giving plovers alternative feeding options if one pond is not accessible or as productive during a portion of the season – has been a key element in boosting productivity, especially as more plovers chose the site to nest. In addition to the pond work, some vegetation thinning or removal was also completed to enhance the suitability of the nesting areas as plovers prefer sparsely vegetated areas to lay their eggs. 

Invasive vegetation being removed from the edge of the large piping plover foraging pond.
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Announcing New NFWF Funded Project to Study and Monitor American Oystercatchers along the Delaware Bay

Wednesday, February 15th, 2023

by Emmy Casper, Wildlife Biologist

CWF is excited to announce a new project funded by the National Fish and Wildlife Foundation’s Delaware Watershed Conservation Fund designed to develop and execute management strategies for American oystercatchers along the Delaware Bay. Breeding populations of American oystercatchers (State Species of Special Concern) have been well studied and monitored along New Jersey’s Atlantic Coast since 2003, but very little is known about the oystercatchers that nest on the sandy beaches along the Delaware Bay. In 2021, CWF conducted a near bay-wide window census survey to establish a baseline estimate of the Bayshore population. Thirteen oystercatcher pairs were documented across approximately 35 sites from Cape May Point to Sea Breeze, prompting a need for further research and management. This new project seeks to shed light on this understudied population and add to our scientific understanding of their management needs.

American oystercatcher. Photo courtesy of Daniel Irons
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2022 Upland Sandpiper Survey Results

Tuesday, January 17th, 2023

by Meaghan Lyon, Wildlife Biologist

The results are in! It wasn’t a great year for upland sandpipers at the McGuire Airfield. Numbers of breeding pairs at this location have decreased to an estimated two pairs. Numbers can be variable from year to year so there is still hope for better news in 2023.

Upland sandpipers typically require a minimum of 100 acres for breeding habitat and so large expanses of open, grassy land is a high priority. Over the past five years, long term efforts have been ongoing to complete a large-scale grassland restoration at the McGuire Airfield. So far, roughly 500 acres have been converted to native warm season grasses with another 100 acres to be completed by next spring. Our goal is to help create and maintain grassland bird nesting habitat for Upland sandpipers and other species.

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Ongoing Grassland Restoration Efforts Improve Conditions for Grassland Nesting Birds

Tuesday, December 20th, 2022

by Meaghan Lyon, Wildlife Biologist

Over the past five years, long term efforts have been ongoing to complete a large-scale grassland restoration at the McGuire Airfield. So far, roughly 500 acres have been treated and seeded to encourage the growth of native warm season grasses with another 100 acres to be completed by next spring. The planting of species like little bluestem, sideoats grama, and blue grama has helped to create grassland bird nesting habitat and conserve existing habitat, while accommodating necessary airfield procedures and safety.

Keeping the vegetation on the airfield short is important to ensure airport safety and to achieve that goal, the fields must be mowed. When the vegetation reaches 12-14 inches, the area is mowed back down to 7 inches. The vegetation before the start of the restoration project was a mix of native and non-native woody, forb, and grass species, with some plants growing at a faster rate than others. The quicker these plants grow, the more frequent mowing must occur. It’s for this reason why native warm season grasses were planted, which have a slower growth rate and tend not to grow more than 12-14 inches. By planting these species and reducing mowing frequency, the grassland birds have less disturbance and human impacts on their nesting season.

This work is done in cooperation with the USFWS New Jersey Field Office, and grassland bird surveys are completed throughout the summer to monitor success. Stay tuned to learn more about our grassland bird results for the 2022 breeding season.

Vegetation must be mowed when grasses exceed 12 inches.

Protecting Seabeach Amaranth – New Jersey’s Endangered Beach Plant

Wednesday, July 6th, 2022

by Todd Pover, Senior Wildlife Biologist

Seabeach Amaranth – Amaranthus pumilus

Although most of CWF’s work focuses on protecting New Jersey’s imperiled wildlife, in a few cases our mission overlaps with at-risk plants, as well. One such case involves seabeach amaranth, a state and federally-listed plant that shares the beach with our endangered beach nesting birds. In the past, CWF’s effort to protect seabeach amaranth was more “behind the scenes” through the development of beach management plans with coastal communities that put measures in place to protect plants from municipal activities. Over the past several years, in partnership with and through funding by the U.S. Fish and Wildlife Service – New Jersey Field Office, CWF has now taken a more pro-active role in helping monitor and protect seabeach amaranth.

Starting in late May and all throughout June, CWF staff combs the state’s Atlantic coast beaches looking for amaranth plants that are just starting to germinate. Once found, the plants are protected with fence and signage, so they aren’t trampled by beach goers or driven over by vehicles conducting various beach maintenance activities, such as cleaning the beach with mechanical rakes. In the past they would have gone undetected and unprotected; few of the plants would have made it to the stage where they flower and produce seeds. Seabeach amaranth is an annual plant, its continued occurrence depends on seeds being produced and then dropped nearby or dispersed by wind or tides for next year’s “crop” of plants.

So far this season, mostly through the diligent fieldwork of CWF’s Biologist Sherry Tirgrath, we have located and protected 811 plants at 19 sites leading into the busy July 4 th holiday. The highest concentrations of plants are on beaches in southern Monmouth and northern Ocean counties. Since seabeach amaranth was rediscovered in New Jersey in 2000 – it had been absent since 1913 – Monmouth County, in particular Sandy Hook, a unit of Gateway National Recreation Area, has harbored most of the state’s seabeach amaranth population. However, over the past few years, increasingly more plants have been found on Ocean County beaches. In addition to increasing the overall population of plants, this wider distribution is one of the goals of the CWF/USFWs initiative.

With the early season work completed, CWF will now move onto other phases of the project. That includes repeat surveys for later germinating plants, ongoing maintenance of the fence we erected, and coordinating with the state’s beach nesting bird staff as they remove their fence once breeding season ends so it can be checked for plants. Those sites often have large numbers of plants as that habitat has been protected for birds – and as a result plants too – since late March or April. Finally, an annual statewide survey of seabeach amaranth occurs in late July and August and CWF will be “on call” to fence plants that are found by those survey crews. Plants can persist until late November in years with mild fall weather and low-flooding, in those cases our fence could remain up until then, so our work for the season has really just begun.