Ships need ballast water for their stability, maneuverability and safety. The down-side to ballast water is that it contains bacteria, algae and animals from the place of its intake. These microscopic organisms may be introduced at the port of ballast water discharge where they may cause devastating harm to the local ecosystem, economy and human health. With continued growth of shipping traffic, the probability increases that such organisms survive the transport in ballast water. In this way, numerous aquatic species have become invasive species and established populations in new areas.
- Teacher: IAMUteacher IAMUteacher