The physical structure of the oyster reefs can help mitigate shoreline loss. They are placed in the intertidal area and just like sand beds, these biogenic barriers help reduce oncoming wave energy, protecting the coastal shore from eroding.
It can act as a potential buffer against flooding or hurricanes. Although it is not as strong as strongly-engineered methodologies like rip-raps, it still save cost, provides a habitat and does not harm the environment. According to a report by Missisippi-Alabama Sea Grant Consortium, 100 miles of oyster reefs can save up to $95million on rip-rap.
Unfortunately, loose oysters shells are not as effective and sustainable as bagged and dried shells. Therefore, only dried and clean shells should be used and placed in bio-degradable bags or in anchored cages. Frequent monitoring of these oyster reefs needs to be done in order to maintain its effectiveness.
cr: baysave.org
cr: blog.nature.org