In 2014, the team worked with the Town of Essex to expand upon the previous two years of work with ongoing assistance from local, state, and federal collaborators. In this next phase, the team conducted test-transplanting efforts at selected sites in Plum Island Sound and expanded to areas in Essex Bay where a new self-established bed, the first in the ACEC in over 75 years, had just been observed. In addition, the team collected data on the population structure of the European green crab in Great Marsh. Observed in hyper-abundant numbers throughout the Great Marsh system, the team collected data to determine its potential impacts on eelgrass beds. This work is a critical next step in bringing a thriving eelgrass population back to the waters of the Great Marsh ACEC, which is essential to a healthy, resilient coastal ecosystem.
Based on results, the team recommend conducting large-scale restoration at select sites in Essex Bay using multiple donor sources while continuing test-transplanting efforts in Plum Island Sound. All transplant sites should be monitored and managed for green crabs through trapping. Findings indicated the need for more robust baseline information on the population structure of the European green crab and that data collection efforts in both Plum Island Sound and Essex Bay should continue.
A more comprehensive description of the study and conclusions as well as detailed management recommendations are in the report Creating the Basis for a Successful Restoration: Test-transplanting Multiple Eelgrass Donor Populations and Characterizing the European Green Crab Population to Inform Restoration Initiatives in the Great Marsh, Massachusetts.Town of Essex, MA. 2014 file size 6MB.