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Monitoring before, during and after a project near coral reefs can also help quantify risks. They strive to find methods to mitigate the dangers of damaging corals during operations, such as removing and replanting the coral. This makes it critical to avoid or at least to minimise the dredging of coral rock.ĭredging contractors are well aware of the delicacy of dredging in coral reef areas.
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These fine clouds of sediments can stay in suspension for a long time, spreading over a large area and often causing increased sedimentation that results in significant light reduction. Limestone and coral materials tend to break into extremely fine particles when dredged, which creates milky white “clouds” of suspended sediments. Why should coral reefs be protected? Healthy coral reefs provide an array of services to human communities, including food (especially protein), protecting shorelines, supporting the livelihoods of local communities, such as fishing and tourism, and sustaining cultural traditions.ĭredging can impact coral reefs because of the composition of the reefs themselves. They are formed from the deposition of calcium carbonate by living organisms, predominantly hard corals, but also by other organisms such as coralline algae and shellfish.Īlthough coral reefs are robust and have often withstood the forces of storms, climatic change, sea level change and predators, the living elements – coral, coralline algae and shellfish that build these structures – are just a very thin veneer of delicate tissue, highly sensitive to the surrounding environment.
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“Facts About Dredging Around Coral Reefs” describes the strategies and care needed to preserve and protect coral reefs during dredging activities.Ĭoral reefs are large, long-lived bio-geological structures that are marine ridges or mounds.
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