![]() Both estuarine flora and fauna may be harmed by contaminants released into the water column by dredging operations. Coral, oysters, and barnacles are particularly vulnerable to the effects of siltation. These effects include reduced light penetration by increased turbidity altered tidal exchange, mixing, and circulation reduced nutrient outflow from marshes and swamps increased saltwater intrusion and creation of an environment highly susceptible to recurrent low dissolved oxygen levels. ![]() Dredge and fill activities in estuaries have many environmental effects, most, although not all, of them deleterious.
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