dan molloy - zebra mussels presentation 9/12/11
TRANSCRIPT
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A Formidable Foe:A Formidable Foe:
The Search for an Environmentally The Search for an Environmentally
Safe Zebra Mussel Control MethodSafe Zebra Mussel Control Method
Daniel P. Molloy, Ph.D.Daniel P. Molloy, Ph.D.
Research Scientist:State University of New York at Albany
Consultant:Molloy & Associates
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Michael SchmidtAssistant SuperintendentMinneapolis Park and Recreation Board Eric EvensonAdministratorMinnehaha Creek Watershed District Lois Sinn LindquistExecutive DirectorMinnesota Waters
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BiologistBiologist Aquatic freshwater biologistAquatic freshwater biologist Study diseases of aquatic organismsStudy diseases of aquatic organisms Diseases in invertebrate aquatic Diseases in invertebrate aquatic
organismsorganisms Especially diseases of pest organisms Especially diseases of pest organisms
– FundamentalFundamental research research
Who is Dan Molloy?Who is Dan Molloy?
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BiologistBiologist Aquatic freshwater biologistAquatic freshwater biologist Study diseases of aquatic organismsStudy diseases of aquatic organisms Diseases in invertebrate aquatic Diseases in invertebrate aquatic
organismsorganisms Especially diseases of pest organisms Especially diseases of pest organisms
– Fundamental researchFundamental research– AppliedApplied research (can we control the pest research (can we control the pest
with the disease)with the disease)
Who is Dan Molloy?Who is Dan Molloy?
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BiologistBiologist Aquatic freshwater biologistAquatic freshwater biologist Study diseases of aquatic organismsStudy diseases of aquatic organisms Diseases in invertebrate aquatic Diseases in invertebrate aquatic
organismsorganisms Especially diseases of pest organisms Especially diseases of pest organisms
– Fundamental researchFundamental research– AppliedApplied research (can we control the pest research (can we control the pest
with the disease)with the disease)
Who is Dan Molloy?Who is Dan Molloy?
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Who is my (our) foe?Who is my (our) foe?
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Two North American Species Two North American Species
Quagga musselQuagga musselDreissena Dreissena
rostriformis bugensisrostriformis bugensis
Zebra musselZebra musselDreissenaDreissena
polymorphapolymorpha
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1988 – Zebra mussels were first discovered 1988 – Zebra mussels were first discovered in Lake St. Clair and Lake Eriein Lake St. Clair and Lake Erie
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http://nas.er.usgs.gov/taxgroup/mollusks/zebramussel/maps/current_zm_quag_map.jpghttp://nas.er.usgs.gov/taxgroup/mollusks/zebramussel/maps/current_zm_quag_map.jpg
……current distribution of current distribution of DreissenaDreissena in in North AmericaNorth America
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Credit: Minnesota DNR
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How did these mussels getHow did these mussels get to North America?to North America?
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So what’s the problem?So what’s the problem?
1. Ecological1. Ecological
2. Recreational2. Recreational
3. Industrial3. Industrial
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Ecological ImpactsEcological Impacts
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Decrease in phytoplanktonDecrease in phytoplankton Decrease in zooplanktonDecrease in zooplankton Increase in water transparencyIncrease in water transparency Increase in macrophytesIncrease in macrophytes Alteration of fish communityAlteration of fish community Alteration of benthic (bottom) Alteration of benthic (bottom)
communitycommunity
Ecological effects of filtration Ecological effects of filtration by by DreissenaDreissena spp. spp.
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Eurasian water-milfoilEurasian water-milfoil
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Recreational Impacts
Cut foot Pelican Lake, MN (Credit - Bob Gilsdorf to Fargo The Forum )
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Industrial ImpactsIndustrial Impacts
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Weeks and Weeks and weeks of weeks of
chlorinationchlorination
TrihalomethanesTrihalomethanes
DioxinsDioxins
How to How to reduce the reduce the use of use of chlorination chlorination and other and other biocides??biocides??
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Find a control method to reduce the use ofbroadspectrum chemicals.
Biological control
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Find a control method to reduce the use ofbroadspectrum chemicals.
Discover a bacterium with specificity to Dreissena spp.?
Biological control
Why a bacterial control agent?
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For decades polluting broadspectrum For decades polluting broadspectrum chemical insecticides were used for black fly chemical insecticides were used for black fly
control in New York Statecontrol in New York State
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B t iBacteria used to control black fly larvae
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Metropolitan MosquitoControl District
165 small streams
28 large river sites
Program began in 1984
Bti bacteria are applied:
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Use of bacteria successfulUse of bacteria successfulagainst black fliesagainst black flies
Maybe success against Dreissena spp. too??
??????????
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Pseudomonas fluorescens CL145A
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2 mm
DreissenaDreissena spp. die following spp. die following ingestion of large quantities ingestion of large quantities
of of P. fluorescensP. fluorescens cells cells
Individual Individual P. fluorescensP. fluorescens cells cells are ~1 x 2 are ~1 x 2 mm
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Trials within power plantsTrials within power plantsNYPA Hydro-electric power NYPA Hydro-electric power
plant Crescent, NYplant Crescent, NYMohawk RiverMohawk River
RG&E Coal-fired power RG&E Coal-fired power plant Rochester, NYplant Rochester, NY
Lake OntarioLake Ontario
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Lab trials = 100% kill.Lab trials = 100% kill.
Veligers appear to be the most Veligers appear to be the most susceptible life stage.susceptible life stage.
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Specificity of Specificity of Pf-Pf-CL145A productCL145A product
Trout Trout Salmo truttaSalmo trutta
Fathead minnow Fathead minnow Pimephales promelasPimephales promelas
Bluegill sunfish Bluegill sunfish Lepomis Lepomis macrochirusmacrochirus
Freshwater ciliate Freshwater ciliate ColpidiumColpidium colpodacolpoda
Zooplankton Zooplankton Daphnia magnaDaphnia magna
Mytilus edulis, Pyganodon grandis, Lasmigona Mytilus edulis, Pyganodon grandis, Lasmigona compressa, Strophirus undalatus, Lampsilis radiata, compressa, Strophirus undalatus, Lampsilis radiata,
Pyganodon cataracta,Pyganodon cataracta, Elliptio complanataElliptio complanata
7 Bivalve 7 Bivalve speciesspecies
Mallard duck Mallard duck Anas platyrhynchosAnas platyrhynchos
Freshwater shrimp Freshwater shrimp Hyalella aztecaHyalella azteca
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If Pf-CL145A is going to really be used to reduce the use of chemical biocides
in pipes, my New York State government lab needed to partner with
a company…..
…..one with expertise in commercializing biopesticides
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Pf-CL145A Product name: Product name: ZequanoxZequanox
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OK, the future of OK, the future of PfPf-CL145A looks -CL145A looks promising for use in pipes.... but could promising for use in pipes.... but could
it be used to in lakes and rivers?it be used to in lakes and rivers?
We will not know without additional research
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The current overriding approach in the fight against zebra mussels is CONTAINMENT
SLOW the spread! = Inspections
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Minnesota has been and continues to Minnesota has been and continues to be a leader in educating its citizen be a leader in educating its citizen
about slowing the spreadabout slowing the spread
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Federal agencies
University of Minnesota Sea Grant
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State governmental agencies
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Local governmental agencies
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Minnesotan citizen groups
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OK, the future of OK, the future of PfPf-CL145A looks -CL145A looks promising for use in pipes.... but could promising for use in pipes.... but could
it be used to in lakes and rivers?it be used to in lakes and rivers?
We will not know if the Pf-CL145A bacterium can be used for containment until it is field tested
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