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Course Outline

Introducing non-native species into District of Columbia waters can upset the balance of the ecosystem, thereby harming the environment. Aquatic nuisance species, such as zebra mussels, quagga mussels, milfoil, and hydrilla, most often spread between waterways by hitching a ride on vessels and trailers. When transplanted into new waters, these organisms proliferate, displacing native species and damaging the water resource.

Hydrilla
Quagga and Zebra Mussels
  • Unit 4 of 6
  • Topic 16 of 19
  • Page 1 of 3