Zebra Mussel Prevention at Lake Powell

1. Zebra Mussel Preventionat Lake Powell Glen Canyon National Recreation Area

2. Meet the Zebra Mussel Dreissena polymorpha and D. bugensis (quagga mussel) • Small invasive mussel with varying stripes • Attaches to surfaces with byssal threads

3. Cost to Facilities • Forms thick mats • Fills intake pipes • Clogs trash screens • Encrusts docks, launch ramps, rocks, andanything else in the water

4. Cost to Recreation • Encrusts Boats • Clogs Engines

5. Cost to Recreation • Encrusts Boats • Clogs Engines • Covers beaches with sharp shells • Fills air with stench of decay

6. Ecological Damage • No ecologically friendly way to eradicate • Encrusts and kills any bottom critters(clams, crayfish, …)

7. Ecological Damage • No ecologically friendly way to eradicate • Encrusts and kills any bottom critters(clams, crayfish, …) • Filters enormous amounts of algae,disrupting the food chain • No natural predators of consequence • Accumulates toxins: Biomagnification

8. Why Lake Powell? • Considered the most likely point ofintroduction to the Colorado River System • Good Conditions for Zebra Mussels

9. Why Lake Powell? • Considered the most likely point ofintroduction to the Colorado River System • Good Conditions for Zebra Mussels • Mussels are transported on boats, in bilgewater, in engines, on trailers, with bait

10. Life Cycle

11. History of Invasion • From the Caspian and Black Seas • Took over all of Europe

12. History of Invasion • From the Caspian and Black Seas • Took over all of Europe • Came to America in ballast water • Discovered in Lake St. Clair in 1988 • Moved through the Great Lakes and 8 majorrivers in the East

13. Zebra Mussel Spread

14. What is being done for theColorado River System? • Lake Powell Prevention Program • Utah Aquatic Nuisance Species Action Team • Utah Division of Wildlife Resources • Education through signs and brochures • Boat inspections at 15 State Parks

15. What is being done for theColorado River System? • Lake Powell Prevention Program • Utah Aquatic Nuisance Species Action Team • Utah Division of Wildlife Resources • Education through signs and brochures • Boat inspections at 15 State Parks • 100th Meridian Initiative • National Invasive Species Act (1996) • Forum for multi-agency cooperation • Stop the spread of Aquatic Nuisance Species from Eastto West at the 100th Meridian

16. Lake Powell Prevention • Monitoring • Screening • Washing

17. Visitor Screening • Has your vessel been used east of theRocky Mountains in the past 30 days? • In which state(s) or province(s) east of the Rocky Mountains was your vesselused? • Alabama, Arkansas, Illinois, Indiana, Iowa, Kentucky,Louisiana, Michigan, Minnesota, Mississippi, Missouri,New York, Ohio, Oklahoma, Pennsylvania, Tennessee,Vermont, West Virginia, Wisconsin, Ontario Canada,Quebec Canada

18. Prevention Packet • Informative pamphlet • Coupon for boat washing • Map to washing facilities

19. Washing Procedure • Assume boat is infested • Remove any organic matter • High pressure wash • Hull, lines, bumpers, motor, trim tabs, anchor trailer,and all nooks and crannies • Drain and flush any water • >140 degrees F • Bilge, live wells, bait buckets, cooling system

20. Washing Procedure

21. Washing Procedure

22. Prevention Program Results forthe 2001 Season • 13 potentially infested boats entered • 9 were voluntarily washed • Roughly the same as 2000

23. For more information • Mark Anderson • 928-608-6266 • Mark_Anderson@nps.gov • Web Resources • www.100thMeridian.org • www.wes.army.mil/el/zebra/zmis/zmishelp.htm

24. National Park Service Mission • Protect resources • Provide recreation • Web Resources • www.100thMeridian.org • www.wes.army.mil/el/zebra/zmis/zmishelp.htm