Sea Level Rise in Delaware Bay, U.S.A.: Adaptations of Spawning Horseshoe Crabs (Limulus polyphemus) to the Glacial Past, and the Rapidly Changing Shoreline of the Bay

Author(s):  
Robert E. Loveland ◽  
Mark L. Botton
2013 ◽  
Vol 69 (1) ◽  
pp. 141-163 ◽  
Author(s):  
Han Song Tang ◽  
Steven I-Jy Chien ◽  
Marouane Temimi ◽  
Cheryl Ann Blain ◽  
Qu Ke ◽  
...  

Author(s):  
Peter Kotulak

The Delaware Department of Natural Resources and Environmental Control (DNREC) has received grants from Hurricane Sandy funding to rehabilitate and improve environmental functionality and sustainability for areas along the Delaware Bay shoreline. The Mispillion Inlet Complex near Milford, Delaware was one of the projects selected due to its importance as habitat for both American Horseshoe Crabs (Limulus polyphemus) and shorebirds, specifically the threatened species Rufa Red Knot (Calidris canutus rufa). The complex includes the Mispillion River and Cedar Creek that connect at Mispillion Inlet and provide access for tidal flow and navigation into the Delaware Bay via federally-authorized and maintained channels. Efforts to stabilize Mispillion Inlet first occurred in 1859 when a 560-foot long timber pile jetty was constructed along the north side of the inlet. In 1908 a south jetty was constructed, and in subsequent years, several additional jetty extensions were made to a total length of about 5,800 feet. In 1985, the barrier spit separating Mispillion River and the Delaware Bay north of the inlet breached and was subsequently closed with a stone dike and sand fill. Two years later, the repaired area was breached again, followed by placement of more rock and sand.


2020 ◽  
Author(s):  
Daria Nikitina ◽  
◽  
Heather Wholey ◽  
Michael Powers ◽  
Cameron Knight ◽  
...  

Geology ◽  
1993 ◽  
Vol 21 (2) ◽  
pp. 121 ◽  
Author(s):  
Charles H. Fletcher III ◽  
James E. Pizzuto ◽  
Suku John ◽  
Jennifer E. van Pelt

2020 ◽  
Vol 12 ◽  
pp. 81-90
Author(s):  
DM Munroe ◽  
TM Grothues ◽  
NE Cleary ◽  
J Daw ◽  
S Estrada

Farms for eastern oyster Crassostrea virginica, which are commonly located along shallow estuarine shores of the eastern USA, use a range of farm equipment and require regular access to care for and harvest oyster livestock. In some cases, these farms are located in areas used by Atlantic horseshoe crabs Limulus polyphemus as they come ashore during spring to spawn. The sandy shores of the Delaware Bay host the largest spawning aggregations of this species in the world. Limited studies have examined interactions between horseshoe crabs and intertidal oyster farms, and concern has been raised about the horseshoe crab’s ability to traverse oyster farms to reach spawning habitat. This study examines potential farm interactions with horseshoe crabs in Delaware Bay during the 2018 and 2019 crab spawning season. Our studies included a range of experiments and surveys during high and low tide to observe crab abundance and behavior at rack-and-bag oyster farm and non-farm sites. In all cases, results indicated that crabs can successfully traverse rack-and-bag farms and reach spawning beaches. Crabs do not differentially use farm versus non-farm areas, and crab behavior is relatively unaltered by farm gear. These results provide important context for developing frameworks for managing ecological interactions among farms and wildlife species of concern.


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