This project was presented at Stockton University's Graduate Symposium held on April 25, 2023. The above image depicts the poster displayed for all attendees to view during the event. Below are the slideshows and abstract submissions, which were also presented to event attendees.
Designated as a keystone species, the American Horseshoe Crab (Limulus polyphemus) plays a pivotal ecosystem role within the Delaware Bay region of New Jersey. In an effort to increase suitable horseshoe crab spawning beaches, the New Jersey Department of Environmental Protection (NJDEP) acquired property along Money Island, New Jersey, through the NJDEP’s Blue Acres program. A historically erosion-dominated shoreline, the NJDEP conducted a beach nourishment project in conjunction with constructing five individual 5.5 ft detached breakwaters in 2021. Implemented to reduce nearshore hydrodynamics and increase sedimentation landward of the structures, the project’s goal was to enhance nesting habitats for horseshoe crabs which will increase egg mass production. This analysis is designed to assess the success of the detached breakwaters for habitat enhancements by evaluating the reduction in nearshore wave climates, increased sedimentation along the beach profile, and overall behavior of the species post project implementation. Wave climate data will be analyzed from deployments of HOBO sensors within the project delineation to collect water pressure data on 1 sec intervals throughout a tidal cycle. Initial data collected in Fall 2022, determined that on average the detached breakwaters attenuate 6.89-21.61% of waves depending on tidal fluctuations. Alterations in sediment transport balance will also be displayed in shoreline change and Digital Elevation Maps to observe for elevation differences pre and post construction. Initial population data has displayed that the structures do not significantly impinge the individual organisms, however further analysis in deterrence and behavioral choices will be analyzed.
Shadow box display of an American Horseshoe Crab displayed at the Graduate Symposium (Right) and the associated tag created for the display (Top)