Stories tagged ballast

Jan
11
2009

Cargo ships carry invasive species in ballst water
Cargo ships carry invasive species in ballst waterCourtesy AviatorDave
A recently released report warns that the Great Lakes have been invaded by foreign aquatic species resulting in ecological and environmental damage amounting to hundreds of millions of dollars.

Monitor, detect, and take required action

The findings support the need for detection and monitoring efforts at those ports believed to be at greatest risk. The report identified 30 nonnative species that pose a medium or high risk of reaching the lakes and 28 others that already have a foothold and could disperse widely.

The National Center for Environmental Assessment issued the warning in a study released (Jan 5, 09). It identified 30 nonnative species that pose a medium or high risk of reaching the lakes and 28 others that already have a foothold and could disperse widely. (click here to access report)

Flush out ship's ballast tanks with salt water

One preventive measure that works 99% of the time is to flush out the ballast tanks with salty sea water. This usually kills any foreign marine life hitch hiking a ride in the ballast tank water. Both Canada and the United States have made this a requirement for almost two decades now. Both nations also recently have ordered them to rinse empty tanks with seawater in hopes of killing organisms lurking in residual pools on the bottom.

Learn more about invasive species in the Great Lakes