Most of the remaining trees due to erosion / abrasion that often occur around the coast. Abrasion is the process of coastal erosion by sea waves and ocean currents that are destructive. Abrasion is usually referred to coastal erosion. Shoreline damage due to abrasion is driven by the disruption of the natural balance of the coastal area. Although the abrasion could be caused by natural phenomena, but the man often referred to as the main cause abrasion. One way to prevent abrasion is by planting mangrove forest.