Loss of coastal ecosystems
The massive changes to our shoreline means than many of our coastal areas are no longer complete ecosystems. The original habitats are fragmented and separated from one another. Animals at the top of the food chain have long since disappeared affecting the balance in the remaining habitats. For example, we no longer have tigers in our mangroves. And animals such as crocodiles are no longer common. Dugongs, dolpins and sea turtles are also less commonly seen. High levels of coastal activity (shipping, dredging and continued reclamation and coastal construction) also contributes to sedimentation, or murky waters. While visibility underwater in the 1960s was 10m, nowadays, this has been reduced to 2m or less. Sediment in the water reduces the light penetration into the water. This affects photosynthesis by seagrasses and other plants, as well as corals which rely on their sym...