aquatic invasive species. invasive species public awareness campaign 2009 sunset commission raised...
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Aquatic Invasive Aquatic Invasive SpeciesSpecies
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Invasive Species Invasive Species Public Awareness CampaignPublic Awareness Campaign
2009 Sunset Commission raised issue of exotic aquatic plants
and directed Texas Parks and Wildlife Department to:
“provide greater information to the public on the harm caused by releasing exotic species.”
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Invasive SpeciesInvasive Species
What is an invasive species? An "invasive species" is defined as a species that is non-native (or alien) to the ecosystem that
• Grows, reproduces and spreads rapidly
• Lacks natural predators and competitors
• Is disease resistant
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Invasive Species ImpactsInvasive Species ImpactsInvasive species…
• Destroy habitats
• Interfere with ecosystem functions (change important processes like fire, nutrient flow and flooding)
• Decrease biodiversity by threatening the survival of native plants and animals
• Hybridize with native species
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Invasive Species ImpactInvasive Species Impact
Why should I care? Invasive species…
• Threaten agriculture (crop damage)
• Are costly to treat, control and to remedy damage caused to public resources & personal equipment (US estimates $137 billion annually)
• Negatively impact recreational activities
• May reduce property values in affected areas
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Aquatic Invasive Species: Aquatic Invasive Species: PlantsPlants
Giant Salvinia
Hydrilla
Elephant ears
Alligator weedCommon water hyacinth
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Aquatic Invasive Species: Aquatic Invasive Species: AnimalsAnimals
Zebra mussels
Asian clam Giant Ram’s-horn snail
NutriaPlecostomus
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Invasive SpeciesInvasive Species
A Closer look
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Invasive Species CampaignInvasive Species CampaignGiant Salvinia (Salvinia molesta) the
first species to be addressed
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Giant Salvinia Giant Salvinia • Floating, rootless fern
• Grows in chains, forming dense mats
• Native of Brazil
• Popular aquarium plant
• First found in Texas in 1998
• Currently reported in over a dozen Texas water bodies and in most US coastal states
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Why Giant Salvinia?Why Giant Salvinia?• Highly destructive
• Can double in size in one week
• Best opportunity to reduce and control
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Hello Salvinia ~ Goodbye LakesHello Salvinia ~ Goodbye Lakes Six month unchecked growth rate
of Giant Salvinia beginning with ¼ acre
0
250
500
750
1,000
1,250
1,500
1,750
2,000
2,250
2,500
2,750
3,000
3,250
3,500
3,750
4,000
4,250
4,500
Lake
Sur
face
( T
hous
ands
of A
cres
)
Lake Austin (1,599 ac)
Lake Amistad (64,900 ac)
Lake Texoma (74,686 ac)
Toledo Bend (181,600 ac)
All Texas Lakes (3.2 million acres)
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The Lesson
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How You Can HelpHow You Can Help• Educate teachers, students and
parents to retain plants and animals from classroom aquariums, displays & science experiments
• Volunteer at a local park, refuge or other wildlife area to help remove invasive species
• Prevent hitchhikers ~ Learn how to clean your shoes & socks, fishing equipment, dogs, boats, cars, bikes and motorcycles
• Choose native plants for your garden and pond that are appropriate for your region. Ask your local nursery to start carrying more native plants.
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ResourcesResourcesTexas Parks & Wildlife, www.tpwd.state.tx.us
Texas Invasives, www.texasinvasives.org
Protect Your Waters, www.protectyourwaters.net
Aquatic Plant Management Society: Understanding Invasive Aquatic Weeds Activity booklet and interactive web site, www.apms.org/activity.htm
University of Florida: Center for Aquatic and Invasive Plants, http://plants.ifas.ufl.edu/
USDA National Invasive Species Information Center, http://www.invasivespeciesinfo.gov/
Science Fairs ~ reducing the risk of spreading invasives, www.anstaskforce.gov/Documents/ISEF.pdf
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Texas Invasives WebsiteTexas Invasives Websitewww.texasinvasives.orgwww.texasinvasives.org
Partnership with Partnership with
Lady Bird Johnson Lady Bird Johnson Wildflower Center Wildflower Center
Features: Features:
– Invasives 101 Invasives 101
– Eco-Alerts by Eco-Alerts by regionregion
– Report new Report new
sightings onlinesightings online
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Thank You!Thank You!