Threats and Population Limiting Factors D. Affects of Beach Replenishment and Alteration Beach replenishment projects and placement of dredge spoil from maintaining the Atlantic Intracoastal Waterway and various inlet channels have impacts on seabeach amaranth.
More study is needed before the overall impacts can be accurately assessed.
Since dredging normally takes place in winter, when amaranth exists primarily as seeds, the impacts on individual plants are likely to be minor. Deeply burying seeds, however, could have serious effects on populations. On the other hand, beach replenishment rebuilds habitat for seabeach amaranth and can have long-term benefits. Southern Beaches a. Wrightsville Beach Wrightsville Beach was probably the first location in North Carolina where seabeach amaranth was collected, in 1888. It was collected several times later, such as in 1931.