zebra mussel prevention at lake powell glen canyon national recreation area
TRANSCRIPT
Zebra Mussel Prevention
at Lake Powell
Glen Canyon National Recreation Area
Dreissena polymorpha and D. bugensis (quagga mussel)
• Small invasive mussel with varying stripes
• Attaches to surfaces with byssal threads
Meet the Zebra Mussel
Cost to Facilities
• Forms thick mats• Fills intake pipes• Clogs trash screens• Encrusts docks, launch ramps, rocks, and
anything else in the water
Cost to Recreation
• Encrusts Boats
• Clogs Engines
• Covers beaches with sharp shells
• Fills air with stench of decay
• Encrusts Boats
• Clogs Engines
Cost to Recreation
• No ecologically friendly way to eradicate• Encrusts and kills any bottom critters
(clams, crayfish, …)
Ecological Damage
• No ecologically friendly way to eradicate• Encrusts and kills any bottom critters
(clams, crayfish, …)
Ecological Damage
• Filters enormous amounts of algae,disrupting the food chain
• No natural predators of consequence
• Accumulates toxins: Biomagnification
Why Lake Powell?
• Considered the most likely point ofintroduction to the Colorado River System
• Good Conditions for Zebra Mussels
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
Life Cycle
History of Invasion
• From the Caspian and Black Seas
• Took over all of Europe
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
Zebra Mussel Spread
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
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 East
to West at the 100th Meridian
Lake Powell Prevention
• Monitoring
• Screening
• Washing
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
Prevention Packet
• Informative pamphlet
• Coupon for boat washing
• Map to washing facilities
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
Washing Procedure
Washing Procedure
Prevention Program Results forthe 2001 Season
• 13 potentially infested boats entered
• 9 were voluntarily washed
• Roughly the same as 2000
For more information
• Mark Anderson- 928-608-6266- [email protected]
• Web Resources- www.100thMeridian.org- www.wes.army.mil/el/zebra/zmis/zmishelp.htm
National Park Service Mission
• Protect resources
• Provide recreation
• Web Resources- www.100thMeridian.org- www.wes.army.mil/el/zebra/zmis/zmishelp.htm