Services – Ecological
Wetlands Restoration Project – Cedar Knolls, NJ
JMS was retained to comply with requirements of an existing wetlands permit. The owner previously mitigated a wetlands area that was disturbed during excavation activities at the site. The mitigation consisted of re-establishment of native wetland vegetation with a required survival rate of 85%.
JMS completed a vegetation inventory of the mitigation area as required by the permit. The inventory established survival rates in the mitigation areas ranging from 20% to 90%. JMS also characterized hydric soils and indicators of wetland hydrology to confirm redevelopment of wetland conditions.
One of the planting areas was documented to be in poor condition due to a variety of factors, including herbicide spraying along an adjacent right of way and the presence of invasive species dominating more than 10% of the mitigation area. Numerous aggressive invasive species were present at the site including Japanese knotweed, Japanese barberry, Japanese bittersweet, phragmites, wineberry, autumn olive and multiflora rose. JMS coordinated removal of invasive species and a native vegetation replanting effort. Favored species established in the wetlands area included pin oak, red oak, green ash and nannyberry. Deer fencing was maintained around the plantings to increase survival rates.
JMS continues to conduct biennial vegetation surveys to comply with the permit requirements, ensure survival of the mitigation areas, and monitor and control invasive species as needed.