Wetland Restoration A closed canopy of buckthorn and other exotic plant species are shading out the native understory of Harrier Marsh and portions of the adjacent sedge meadow and wet prairie. This condition impairs biological function and hydrology and exposes soil to erosion. As a result, wetland function has been adversely impacted allowing invasive species to displace native species. This further contributes to wetland degradation and loss of habitat. Before Jack Pizzo stands before the towering stalks of common reed (Phragmites australis) targeted for removal as part of the wetland restoration. Click image for larger version and photo data Click for more "before" images. After The wetland improves after removal of invasive shrubs and common reed. Click image for larger version and photo data Click for more "after" images. Methods Outcomes